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Littérature scientifique sur le sujet « POLY (ACRYLAMIDE-CO-ACRYLIC ACID) COMPOSITE »

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Publié le 11 septembre 2023

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Articles de revues sur le sujet "POLY (ACRYLAMIDE-CO-ACRYLIC ACID) COMPOSITE"

Zaharia, Anamaria, Anita-Laura Radu, Stela Iancu, Ana-Mihaela Florea, Teodor Sandu, Iulian Minca, Victor Fruth-Oprisan, Mircea Teodorescu, Andrei Sarbu et Tanta-Verona Iordache. « Bacterial cellulose-poly(acrylic acid-co-N,N′-methylene-bis-acrylamide) interpenetrated networks for the controlled release of fertilizers ». RSC Advances 8, n^o 32 (2018) : 17635–44. http://dx.doi.org/10.1039/c8ra01733f.

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In this study, composite hydrogels with interpenetrated polymer networks (IPNs), based on bacterial cellulose (BC) and poly(acrylic acid-co-N,N′-methylene-bis-acrylamide) (PAA) were synthesized by radical polymerization.

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Cheng, Wei-Min, Xiang-Ming Hu, Yan-Yun Zhao, Ming-Yue Wu, Zun-Xiang Hu et Xing-Teng Yu. « Preparation and swelling properties of poly(acrylic acid-co-acrylamide) composite hydrogels ». e-Polymers 17, n^o 1 (1 janvier 2017) : 95–106. http://dx.doi.org/10.1515/epoly-2016-0250.

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AbstractIn order to study the effect of composite clays on the mechanical properties, water absorption and salt tolerance of a hydrogel, a poly(acrylic acid-co-acrylamide)/bentonite/kaolin composite hydrogel was prepared. Acrylic acid and acrylamide have been used as water absorbent monomers. N,N′-methylene bisacrylamide was used as a crosslinking agent while potassium persulfate was used as an initiator. The water preserving capability, repeated water absorption, salt resistance and the mechanical properties of the composite hydrogel are analyzed and discussed. The results show that a small quantity of bentonite can increase the storage modulus of the composite hydrogel, whereas the excess clay had an unfavorable effect on the mechanical strength of the composite hydrogel. Both bentonite and kaolin significantly improved the water preserving capability, repeated water absorption and salt resistance of the composite hydrogel. Optimum values for the amounts of bentonite and kaolin were found to be 10% and 5%, respectively.

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Tang, Yaoji, Rui Yang, Dong Ma, Bin Zhou, Linhui Zhu et Jing Yang. « Removal of Methyl Orange from Aqueous Solution by Adsorption onto a Hydrogel Composite ». Polymers and Polymer Composites 26, n^o 2 (février 2018) : 161–68. http://dx.doi.org/10.1177/096739111802600204.

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Poly(acrylic acid- co-2-acrylamide-2-methyl-1-propanesulfonic acid)/kaolin hydrogel composite was synthesised using acrylic acid (AA), 2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS) and kaolin (KL) as main materials. The composite was characterised and used to remove methyl orange (MO) from aqueous solutions. Effect of adsorption conditions, including initial concentration of MO, contact time, pH values and ionic strength, on the adsorption capacities was studied. Maximal adsorption capacity was 506 mg/g as the initial concentration of MO was 1000 mg/L. It showed that the adsorption process was spontaneous, and the isotherms and kinetics were in good agreement with the Freundlich isotherm model and pseudo-second-order equation, respectively.

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Simeonov, Marin, Anton Atanasov Apostolov, Milena Georgieva, Dimitar Tzankov et Elena Vassileva. « Poly(acrylic acid-co-acrylamide)/Polyacrylamide pIPNs/Magnetite Composite Hydrogels : Synthesis and Characterization ». Gels 9, n^o 5 (26 avril 2023) : 365. http://dx.doi.org/10.3390/gels9050365.

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Novel composite hydrogels based on poly(acrylic acid-co-acrylamide)/polyacrylamide pseudo-interpenetrating polymer networks (pIPNs) and magnetite were prepared via in situ precipitation of Fe3+/Fe2+ ions within the hydrogel structure. The magnetite formation was confirmed by X-ray diffraction, and the size of the magnetite crystallites was shown to depend on the hydrogel composition: the crystallinity of the magnetite particles increased in line with PAAM content within the composition of the pIPNs. The Fourier transform infrared spectroscopy revealed an interaction between the hydrogel matrix, via the carboxylic groups of polyacrylic acid, and Fe ions, which strongly influenced the formation of the magnetite articles. The composites’ thermal properties, examined using differential scanning calorimetry (DSC), show an increase in the glass transition temperature of the obtained composites, which depends on the PAA/PAAM copolymer ratio in the pIPNs’ composition. Moreover, the composite hydrogels exhibit pH and ionic strength responsiveness as well as superparamagnetic properties. The study revealed the potential of pIPNs as matrices for controlled inorganic particle deposition as a viable method for the production of polymer nanocomposites.

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Zhu, Wenjuan, Zhiyong Yang, Akram Yasin, Yanxia Liu et Letao Zhang. « Preparation of Poly(acrylic acid-acrylamide/starch) Composite and Its Adsorption Properties for Mercury (II) ». Materials 14, n^o 12 (14 juin 2021) : 3277. http://dx.doi.org/10.3390/ma14123277.

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The poly(acrylic acid-acrylamide/starch) composite was synthesized by solution polymerization, aiming to adsorb mercury (II) in water. The resulted copolymer was characterized by particle size exclusion chromatography (SEC), Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), scanning electron microscopy (SEM) and dynamic light scattering particle size analyzer (DLS). It turned out that starch was successfully incorporated with the macromolecular polymer matrix and played a key role for improving the performance of the composites. These characterization results showed that the graft copolymer exhibited narrow molecular weight distribution, rough but uniform morphology, good thermal stability and narrow particle size distribution. The graft copolymer was used to remove Hg(II) ions from aqueous solution. The effects of contact time, pH value, initial mercury (II) concentration and temperature on the adsorption capacity of Hg(II) ions were researched. It was found that after 120 min of interaction, poly(acrylic acid-acrylamide/starch) composite achieved the maximum adsorption capacity of 19.23 mg·g−1 to Hg(II) ions with initial concentration of 15 mg·L−1, pH of 5.5 at 45 °C. Compared with other studies with the same purpose, the composites synthesized in this study present high adsorption properties for Hg(II) ion in dilute solution. The adsorption kinetics of Hg(II) on the poly(acrylic acid-acrylamide/starch) composite fits well with the pseudo second order model.

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Wang, Yongsheng, Yongfeng Zhu, Yan Liu, Bin Mu et Aiqin Wang. « Slow Release and Water Retention Performance of Poly(acrylic acid-co-acrylamide)/Fulvic Acid/Oil Shale Semicoke Superabsorbent Composites ». Polymers 14, n^o 9 (22 avril 2022) : 1719. http://dx.doi.org/10.3390/polym14091719.

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In order to achieve the low cost and multifunction of superabsorbent composites, poly(acrylic acid-co-acrylamide)/fulvic acid/oil shale semicoke (PAMFS) were prepared by free radical copolymerization of fulvic acid (FA), oil shale semicoke (OSSC), acrylic acid (AA) and acrylamide (AM). The characterization results revealed that FA and OSSC were involved in the construction of a three-dimensional (3D) polymeric network via hydrogen bonding and covalent bonding. The water absorbency of PAMFS in distilled water and 0.9 wt% NaCl solution were 724 and 98 g/g, respectively. The FA slow release of PAMFS in distilled water and soil was achieved due to the interaction between FA and the functional groups of polymer matrix by hydrogen bonds and covalent bonds. Furthermore, the potted experiment indicated that the addition of PAMFS to soil can significantly promote plant growth compared with the pure soil, regardless of water stress. Therefore, this superabsorbent composite showed an excellent water absorption and salt resistance performance, as well as nice slow release performance. It has a broad application prospect.

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Yang, Huang, et Sun Dong-ping. « BACTERIAL CELLULOSE WHISKER/POLY(ACRYLIC ACID-co-ACRYLAMIDE) SUPER-ABSORBENT COMPOSITE RESINS ». Acta Polymerica Sinica 013, n^o 9 (9 octobre 2013) : 1183–89. http://dx.doi.org/10.3724/sp.j.1105.2013.12397.

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Diao, Quan, Hongyan Liu et Yanyu Yang. « A Highly Mechanical, Conductive, and Cryophylactic Double Network Hydrogel for Flexible and Low-Temperature Tolerant Strain Sensors ». Gels 8, n^o 7 (7 juillet 2022) : 424. http://dx.doi.org/10.3390/gels8070424.

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Due to their stretchability, conductivity, and good biocompatibility, hydrogels have been recognized as potential materials for flexible sensors. However, it is still challenging for hydrogels to meet the conductivity, mechanical strength, and freeze-resistant requirements in practice. In this study, a chitosan-poly (acrylic acid-co-acrylamide) double network (DN) hydrogel was prepared by immersing the chitosan-poly (acrylic acid-co-acrylamide) composite hydrogel into Fe2(SO4)3 solution. Due to the formation of an energy-dissipative chitosan physical network, the DN hydrogel possessed excellent tensile and compression properties. Moreover, the incorporation of the inorganic salt endowed the DN hydrogel with excellent conductivity and freeze-resistance. The strain sensor prepared using this DN hydrogel displayed remarkable sensitivity and reliability in detecting stretching and bending deformations. In addition, this DN hydrogel sensor also worked well at a lower temperature (−20 °C). The highly mechanical, conductive, and freeze-resistant DN hydrogel revealed a promising application in the field of wearable devices.

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Sjaifullah, Achmad, I. Nyoman Adi Winata et Ahmad Suhardiman. « Hydrogel Composite Based On Arrowroot Starch-G-Poly (Acrylamide-Co-Acrylic Acid)/Zeolite as Matrix of Controlled Release Urea Fertilizer ». Indonesian Chimica Letters 1, n^o 1 (17 juin 2022) : 17–22. http://dx.doi.org/10.19184/icl.v1i1.10.

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Agricultural yields can be increased through fertilization. Conventional fertilization by spreading fertilizer on agricultural land is very ineffective. As much as 40-70% of the nitrogen from urea given through conventional fertilization will be leaching. This problem can be overcome by implementing a new fertilization system, namely by applying controlled fertilizer release technology or Control Release Fertilizer (CRF). The CRF system is made by loading or mixing urea fertilizer at the time of synthesis of a composite based on Arrowroot Starch-g-poly (acrylamide-co-acrylic acid)/zeolite. Fertilizer will come off gradually during fertilizing the land. Synthesis of starch-based hydrogel composite Arrowroot Starch-g-poly (acrylamide-co-acrylic acid)/zeolite loaded or mixed with urea fertilizer, has been successfully carried out. The composite's structure characterized by IR spectroscopy and its ability as CRF has also been tested through swelling and urea release tests in distilled water, phosphate buffer pH 5, pH 7 and pH 9. The results show that the swelling capacity and urea release in distilled water > Buffer pH 7 > pH 9 > pH 5. The welling degree in distilled water, Buffer pH 5, pH 7 and pH 9 is 39.078; 18,719; 36,296 and 33,510 g.g-1 respectively and the release of urea is 2,129; 1,829; 2,110; and 2,091 mg.mL-1 respectively and they showed significant differences.

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Shaheen Wali, Shaheen Wali, Manzoor Iqbal Khattak Manzoor Iqbal Khattak et Mahmood Iqbal Khattak and Ashif Sjjad Mahmood Iqbal Khattak and Ashif Sjjad. « Synthesis, Characterization and Application of Karak Bentonite Clay-Graft-Poly (Acrylamide/Co- Acrylic Acid) Superabsorbent Composite and its Adsorption Study for Selected Heavy Metals ». Journal of the chemical society of pakistan 45, n^o 3 (2023) : 226. http://dx.doi.org/10.52568/001240/jcsp/45.03.2023.

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A novel superabsorbent composite (SAC) based on bentonite, acrylamide and acrylic acid was synthesized. The effects of bentonite quantity, initiator content on the grafting degree and on the water absorbency for the samples were studied. Synthesis mechanism, morphology and thermal properties of the SAC were characterized. FTIR results confirmed the presence of acrylamide/ acrylic acid onto bentonite backbone while TGA showed that introduction of 70 % bentonite to polymer increases thermal stability. The SAC was also tested in the removal of heavy metal in aqueous solution where kinetics analyses were performed using Langmuir adsorption isotherm. The optimum adsorption capability of heavy metal ions onto bentonite-based SAC from solution was 92, 48 and 91 % for Pb++, Ni++, and Cu++ respectively. The unique characteristics of these SAC such as its slow-release and water-retention capability, nontoxicity in soil, environmentally friendly and high capacity for the removal of heavy metals might be very valuable in agriculture and environmental studies

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Thèses sur le sujet "POLY (ACRYLAMIDE-CO-ACRYLIC ACID) COMPOSITE"

GUPTA, PREETI. « HYDROGEL BASED WOUND DRESSING MATERIAL ». Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18806.

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Weak mechanical strength of hydrogels in wet condition limits their use for load bearing applications. Their mechanical strength can be raised by grafting them over some support or by converting them into nanofibrous form. Present thesis is focused on the preparation of poly (acrylamide-co-acrylic acid) hydrogel grafted over cotton fabric using two different cross-linkers i.e. PEG and MBAAm for making medicated dressing and nanofibers of hydrogel of poly (acrylamide-co-acrylic acid). FTIR was used to confirm the insertion of cross-links into the polymer chains. Grafting of uniform hydrogel layer on cotton surface and formation of hydrogel nanofibers were confirmed by using SEM. The average fibre diameter was found to be 275±94.5 nm. Swelling of composite prepared using PEG followed first-order kinetic model at acidic and neutral pH whereas second-order kinetic model at pH 8.5 while that prepared using MBAAm followed second-order kinetic equation at all the pHs studied. The kinetics of swelling was also governed by Peppas model at all pHs. Release of drug from both the composites was studied in phosphate buffers having pH 5.5,7 and 8.5 at 37±0.1°C and observed that it was fastest in phosphate buffer having pH 7. On fitting drug release data into different models, it was observed that drug release was diffusion controlled and followed Fickian diffusion mechanism in case of composite prepared by using PEG as cross-linker whereas it was controlled by diffusion as well as chain relaxation in case of composite prepared by using MBAAm. Mechanical testing using Universal Testing Machine supported a higher mechanical strength of the hydrogel composite as compared to its film. Swelling behaviour of Nanofibrous mats was found to be highest at neutral pH and it followed second order kinetics at all pHs. The drug release kinetics was further evaluated and found that it took place by Fickian diffusion (n < 0.5) and followed second order release kinetics. Antimicrobial tests were performed to show the effectiveness of drug loaded within the hydrogel samples.

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Pinardag, Fatma Esra. « Modified Acrylic Hydrogels As Controlled Release Systems ». Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607362/index.pdf.

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In this study, pH-sensitive poly(acrylamide-co-acrylic acid) hydrogels were synthesized as controlled release systems in the presence of N,N-methylene bisacrylamide as crosslinker and ammonium persulfate as initiator. A set of hydrogels were used in the form they were prepared. One set of hydrogels were prepared as porous networks by incorporating sodium chloride into the reaction medium and then leaching of it after the completion of polymerization reaction. Two sets of hydrogels were modified by argon-plasma at different discharge powers. Hydrogels were characterized by 13C-NMR, XPS, SEM, ATR-FTIR, ESR as well as equilibrium degree of swelling (EDS) and contact angle measurements. Prepared hydrogels were loaded with a model antibiotic, ciprofloxacin-HCl (CPFX), and in-vitro release of CPFX from hydrogel matrices were examined in buffer solutions of varying pH values. There are two factors determining the release rates of CPFX
one is the pH-dependent solubility of CPFX and the other is EDS of the hydrogel samples. For porous samples drug loading and release rates were higher when compared to the control samples and CPFX solubility dominated over release kinetics. Plasma treatment resulted in prolonged release rates in acidic medium.

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Lan, Han-Zhong, et 藍漢中. « Study on the synthesis and properties of poly(acrylic acid-co-acrylamide)/fly ash composite hydrogel ». Thesis, 2015. http://ndltd.ncl.edu.tw/handle/39301253943970347119.

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碩士
國立臺灣師範大學
化學系
103
This main goal of thesis is to prepare two anionic superabsorbent hydrogel, polyacrylic acid / polyacryl amide ( P(AA/AM) ) and polyacrylic acid / polyacryl amide / fly ash ( P(AA/AM)/FA ). Ammmonium persulfate ( APS) and N,N’methylene bisacrylamide (MBA) were used as an initiator and crosslinking agent, respectively. Using FT-IR to identify structure, surface porosity is observed by SEM. The parameters what could be effected experiment are monomer ratio, initiator dosage, crosslinker dosage, reaction temperature and proportion of fly ash. We measure water absorbency of hydrogel in water, saline solution and variety of different situation and then test the mechanical properties, including compressive strength and water absorption under load (AUL). We evaluate if P(AA/AM)/FA hydrogel whose additive quantity, proportion of fly ash and particle size is reasonablely applied to the grout and cement mortar as a self-curing agent. Then we researched hydration degree, cracking index, and setting time in grout. We calculated weight-loss, water retention,compressive strength, internal humidity, and drying shrinkage in cement mortar. The result indicate that P(AA/AM)/FA hydrogel in the optimum reaction condition, the water absorbency is 386 g/g in water, and 56, 26 g/g in 0.1M NaCl(aq) and 0.1M CaCl2(aq), repectively. The compressive strength is 47.5 (Kgf / cm2). When we add P(AA/AM)/FA hydrogel into mortar as self-curing reagent, the optimum dosage, particle size and proportion of fly ash is 0.2 wt%, 0.082 mm and 10 wt%, respectively, in this condition, improve the performance of weight-loss, compressive strength, internal humidity, drying shrinkage and craking formation. All the performance is better than the control group without P(AA/AM)/FA hydrogel.

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CHOU, Yu-Lin, et 周佑霖. « Study on the synthesis and properties of poly(acrylic acid-co-acrylamide)/silica fume composite hydrogel ». Thesis, 2015. http://ndltd.ncl.edu.tw/handle/24246573649328673500.

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碩士
國立臺灣師範大學
化學系
103
This main goal of thesis is to prepare two anionic superabsorbent hydrogel, polyacrylic acid / polyacryl amide ( P(AA/AM) ) and polyacrylic acid / polyacryl amide / Silica fume ( P(AA/AM)/SF ). Ammmonium persulfate (APS) and N,N’methylene bisacrylamide (MBA) were used as an initiator and crosslinking agent, respectively. Using FT-IR to identify structure, surface porosity is observed by SEM. The parameters what could be effected experiment are monomer ratio, initiator dosage, crosslinker dosage, reaction temperature and proportion of silica fume. We measure water absorbency of hydrogel in water, saline solution and variety of different situation and then test the mechanical properties, including compressive strength . We evaluate if P(AA/AM) hydrogel whose additive quantity is reasonablely applied to the grout and cement mortar as a self-curing agent. Then we researched hydration degree, cracking index, and setting time in grout. We calculated weight-loss, water retention,compressive strength, internal humidity, and drying shrinkage in cement mortar. The result indicate that P(AA/AM)SF hydrogel in the optimum reaction condition, the water absorbency is 410.5 g/g in water, and 40.4, 24.4 g/g in 0.1M NaCl(aq) and 0.1M CaCl2(aq),repectively. The compressive strength is 48.6 (Kgf / cm2). When we add P(AA/AM) hydrogel into mortar as self-curing reagent, the optimum dosage is 0.2 wt% , respectively, in this condition, improve the performance of weight-loss, compressive strength, internal humidity, drying shrinkage and craking formation. All the performance is better than the control group without P(AA/AM) hydrogel.

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Li, Lin, et 李麟. « Study on the Synthesis and Properties of Poly(Acrylic acid-co-Acrylamide)/Rice Husk Ash Hydrogel Composites ». Thesis, 2018. http://ndltd.ncl.edu.tw/handle/27h38w.

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碩士
國立臺灣師範大學
化學系
106
Rice husk ash (RHA) was very common waste in agricultural production. In the thesis，we had prepared P(AA/AM)/RHA hydrogel composites, and changed the dosage of RHA, compared to P(AA/AM) hydrogel without RHA. FT-IR spectrum was used to identity the functional group of hydrogels. SEM was observed the surface of hydrogels. Then the hydrogels was determined water absorbency in deionized water、saline solution of different concentration and pore solution. P(AA/AM)/RHA hydrogel composites were used as self-curing agent, added to cement paste and mortar. We compared mortar added to RHA composites with that added general P(AA/AM) hydrogel for the influences of weight-loss、relative humidity、drying shrinkage、autogenous shrinkage and setting time. Further, the cracking index in cement paste and the surface of cement paste were determined, observed and discussed cement hydration. The results indicated that the higher water absorbency of all tested P(AA/AM)/RHA hydrogel composites in saline solution, and better water retention in pore solution. When P(AA/AM)/RHA composites was added to mortar and cement paste, it reduced weight-loss、drying shrinkage and autogenous shrinkage, improved compressive strength and internal humidity, lower cracking formation had good influences in cement paste.

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Cai, Chun-En, et 蔡春恩. « Influence of surface free energy and zeta potential on albumin onto poly(acrylonitrile-co-acrylamide-co-acrylic acid)gels ». Thesis, 1993. http://ndltd.ncl.edu.tw/handle/67939332097671017570.

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Tsai, Chuen En, et 蔡春恩. « Influence of Surface Free Energy and Zeta Potential on Albumin onto Poly(Acrylonitrile-co-Acrylamide-co-Acrylic Acid) Gels ». Thesis, 1993. http://ndltd.ncl.edu.tw/handle/28485637286747463313.

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Livres sur le sujet "POLY (ACRYLAMIDE-CO-ACRYLIC ACID) COMPOSITE"

Panigrahi, Muktikanta, et Arpan Kumar Nayak. Polyaniline based Composite for Gas Sensors. IOR PRESS, 2021. http://dx.doi.org/10.34256/ioriip212.

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In this research work, we have demonstrated the synthesis, spectroscopic characteristics, thermal behaviour and DC conductivity of a few nanostructured composites, substituted conducting polymers (ICPs) and composites of ICPs. The physical properties of aforementioned composites are significantly changed by the doping with HCl, H2SO4, HNO3, H3PO4, or acrylic acid. The charge transport properties of these polymeric materials have been studied in detail because of their potential application in gas sensors. In the current work, varieties of conducting polymer based materials such as PANI-ES/Cloisite 20A nanostructured composite, acrylic acid (AA) doped PANI polymer, N-substituted conducting polyaniline polymer, DL−PLA/PANI-ES composites, poly methyl methacrylate (PMMA) based polyaniline composite, and inorganic acid doped polyaniline are sucessfuly synthesized using aniline/aniline hydrochloride as precursors in acidic medium. Particularly, AA based synthesised PANI polymer was found with higher solubility The spectroscopic, thermal stability, enthalpy of fusion, room temperature DC conductivity and temperature dependent DC conductivity measurements with and without magnetic was carried out with as-synthesized materials. The FTR/ATR−FTIR spectra indicated the presence of different functional groups in the as-prepared composite materials. The UV−Visible absorption spectroscopic analysis showed the presence of polaron band suggesting PANI-ES form. The Room temperature DC conductivity, temperature variation DC conductivity (in presence and absence of magnetic field), and magnetoresistance (MR) of as-prepared conducting polyaniline based were analysed. The highest room temperature DC conductivity value was obtained from H2SO4 doped based composite materials and all prepared conductive composites were followed ohms law. The low temperature DC conductivity was carried out in order to study the semiconducting nature of prepared materials. The Mott type VRH model was found to be well fitted the conductivity data and described the density of states at the Fermi level which is constant in this temperature range. From MR plots, a negative MR was observed, which described the quantum interference effect on hopping conduction. We discuss different gas analytes i.e., NO2, LPG, H2, NH3, CH4, and CO of conducting polymer based materials.

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Chapitres de livres sur le sujet "POLY (ACRYLAMIDE-CO-ACRYLIC ACID) COMPOSITE"

Pramanik, Nabakumar, Sasmita Mohapatra, Panchanan Pramanik et Parag Bhargava. « Processing and Properties of Nano-Hydroxyapatite(n-HAp)/Poly(Ethylene-Co-Acrylic Acid)(EAA) Composite Using a Phosphonic Acid Coupling Agent for Orthopedic Applications ». Dans Progress in Nanotechnology, 49–55. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9780470588260.ch8.

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Actes de conférences sur le sujet "POLY (ACRYLAMIDE-CO-ACRYLIC ACID) COMPOSITE"

Sjaifullah, Achmad, Lia Zakiatal Faidza et Yoshiharu Mitoma. « Arrowroot starch-g-poly (acrylic acid-acrylamide)/zeolite hydrogel composite as matrix for CRF of nitrogen, phosphorous and kalium ». Dans HIGH-ENERGY PROCESSES IN CONDENSED MATTER (HEPCM 2020) : Proceedings of the XXVII Conference on High-Energy Processes in Condensed Matter, dedicated to the 90th anniversary of the birth of RI Soloukhin. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0015312.

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Winata, I. Nyoman Adi, Achmad Sjaifullah et Zulfa Nailul Ilmi. « Composite of zeolite and arrowroot starch-g-poly(acrylic acid-co-acrilamide) hydrogel as matrix of controlled release phosphate fertilizers ». Dans II INTERNATIONAL SCIENTIFIC AND PRACTICAL SYMPOSIUM “MATERIALS SCIENCE AND TECHNOLOGY” (MST-II-2022). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0147370.

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Mittal, Hemant, Ali Al-Alili et Saeed M. Alhassan. « Adsorption Isotherm and Kinetics of Water Vapor Adsorption Using Novel Super-Porous Hydrogel Composites ». Dans ASME 2020 14th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/es2020-1642.

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Abstract Deliquescent salts have high water vapor adsorption capacity, but they dissolve in water by forming crystalline hydrates. That restricts their use in different water vapor adsorption applications. However, this limitation can be overcome by incorporating deliquescent salts within a polymer matrix which will keep the salt solution in place. Furthermore, if the polymer matrix used is also capable of adsorbing water vapor, it will further improve the overall performance of desiccant system. Therefore, in this work, we are proposing the synthesis and use of a highly effective new solid polymer desiccant material, i.e. superporous hydrogel (SPHs) of poly(sodium acrylate-co-acrylic acid (P(SA-co-AA)), and subsequently its composite with deliquescent salt, i.e. calcium chloride (CaCl2), to adsorb water vapors from humid air without the dissolution of the salt in the adsorbed water. Parental PAA-SPHs matrix alone exhibited an adsorption capacity of 1.02 gw/gads which increased to 3.35 gw/gads after incorporating CaCl2 salt in the polymer matrix. Both materials exhibited type-III adsorption isotherm and the experimental isotherm data fitted to the Guggenheim, Anderson and Boer (GAB) isotherm model. However, the adsorption kinetics followed linear driving force model which suggested that this extremely high adsorption capacity was due to the diffusion of water molecules into the interconnected pores of SPHs via capillary channels followed by the attachment of adsorbed water molecules to the CaCl2 salt present in the polymer matrix. Furthermore, the adsorbents were used successively for six cycles of adsorption with a very little loss in adsorption capacity. Therefore, the proposed polymer desiccant material overcomes the problem of dissolution of deliquescent salts and opens the doors for a new class of highly effective solid desiccant material.

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Manaila, Elena, Gabriela Craciun, Daniel Ighigeanu et Maria Daniela Stelescu. « Radiation Synthesis and Characterization of Poly(Acrylamide-co-Acrylic Acid) Hydrogels Used for the Absorption of Heavy Metals ». Dans The 6th International Conference on Advanced Materials and Systems. INCDTP - Division : Leather and Footwear Research Institute, Bucharest, RO, 2016. http://dx.doi.org/10.24264/icams-2016.i.16.

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Manaila, Elena, Gabriela Craciun, Daniel Ighigeanu et Maria Daniela Stelescu. « Heavy Metals Removal from Contaminated Water Using Poly(Acrylamide-co-Acrylic Acid)-Sodium Alginate Flocculant Obtained by Electron Beam Irradiation ». Dans The 6th International Conference on Advanced Materials and Systems. INCDTP - Division : Leather and Footwear Research Institute, Bucharest, RO, 2016. http://dx.doi.org/10.24264/icams-2016.iii.9.

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Olekhnovich, Roman. « SYNTHESIS OF POLY(ACRYLIC ACID)-CO-ACRYLAMIDE/BENTONITE POLYMER NANOCOMPOSITE AS AN ABSORBENT FOR REMOVAL OF HEAVY METAL IONS FROM WATER ». Dans 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b52/s20.063.

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