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Journal articles on the topic 'Oligomeric surfactants'

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Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Huang, Huiyu, Xiaoling Huang, Hongping Quan, and Xin Su. "Soybean-Oil-Based CO2-Switchable Surfactants with Multiple Heads." Molecules 26, no. 14 (July 18, 2021): 4342. http://dx.doi.org/10.3390/molecules26144342.

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Oligomeric surfactants display the novel properties of low surface activity, low critical micellar concentration and enhanced viscosity, but no CO2 switchable oligomeric surfactants have been developed so far. The introduction of CO2 can convert tertiary amine reversibly to quaternary ammonium salt, which causes switchable surface activity. In this study, epoxidized soybean oil was selected as a raw material to synthesize a CO2-responsive oligomeric surfactant. After addition and removal of CO2, the conductivity analyzing proves that the oligomeric surfactant had a good response to CO2 stimulation. The viscosity of the oligomeric surfactant solution increased obviously after sparging CO2, but returned to its initial low viscosity in the absence of CO2. This work is expected to open a new window for the study of bio-based CO2-stimulated oligomeric surfactants.

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2

Liu, Lulu, Shuai He, Lu Tang, Shu Yang, Tao Ma, and Xin Su. "Application of CO2-Switchable Oleic-Acid-Based Surfactant for Reducing Viscosity of Heavy Oil." Molecules 26, no. 20 (October 16, 2021): 6273. http://dx.doi.org/10.3390/molecules26206273.

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CO2-switchable oligomeric surfactants have good viscosity-reducing properties; however, the complex synthesis of surfactants limits their application. In this study, a CO2-switchable “pseudo”-tetrameric surfactant oleic acid (OA)/cyclic polyamine (cyclen) was prepared by simple mixing and subsequently used to reduce the viscosity of heavy oil. The surface activity of OA/cyclen was explored by a surface tensiometer and a potential for viscosity reduction was revealed. The CO2 switchability of OA/cyclen was investigated by alternately introducing CO2 and N2, and OA/cyclen was confirmed to exhibit a reversible CO2-switching performance. The emulsification and viscosity reduction analyses elucidated that a molar ratio of OA/cyclen of 4:1 formed the “pseudo”-tetrameric surfactants, and the emulsions of water and heavy oil with OA/cyclen have good stability and low viscosity and can be destabilized quickly by introducing CO2. The findings reported in this study reveal that it is feasible to prepare CO2-switchable pseudo-tetrameric surfactants with viscosity-reducing properties by simple mixing, thus providing a pathway for the emulsification and demulsification of heavy oil by using the CO2-switchable “pseudo”-oligomeric surfactants.

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3

Chou, S. I., and J. H. Bae. "Using Oligomeric Surfactants To Improve Oil Recovery." SPE Reservoir Engineering 4, no. 03 (August 1, 1989): 373–80. http://dx.doi.org/10.2118/16725-pa.

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4

Han, Yuchun, Yaxun Fan, Chunxian Wu, Yilin Wang, and Yanbo Hou. "Synthesis and aggregation behavior of oligomeric surfactants." SCIENTIA SINICA Chimica 45, no. 4 (March 1, 2015): 327–39. http://dx.doi.org/10.1360/n032014-00246.

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5

Laschewsky, André, Laurent Wattebled, Michel Arotçaréna, Jean-Louis Habib-Jiwan, and Rivo H. Rakotoaly. "Synthesis and Properties of Cationic Oligomeric Surfactants." Langmuir 21, no. 16 (August 2005): 7170–79. http://dx.doi.org/10.1021/la050952o.

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6

VORTMAN, M. YA, V. N. LEMESHKO, L. A. GONCHARENKO, S. M. KOBYLINSKIY, V. V. SHEVCHENKO, and S. N. OSTAPIUK. "OLIGOMERIC GUANIDINE-CONTAINING PROTON CATIONIC IONIC LIQUID." Polymer journal 43, no. 4 (November 26, 2021): 304–10. http://dx.doi.org/10.15407/polymerj.43.04.304.

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Oligomeric ionic liquids occupy an intermediate position between low molecular weight and polymeric. They are promising as polymer electrolytes in electrochemical devices for various purposes, membranes for the separation of gas mixtures, in sensor technologies, and so on. Oligomeric guanidinium ionic liquids are practically not described in the literature. In terms of studying the effect of the structure of the epoxy component on the properties of oligomeric ionic liquids of this type, it is advisable to introduce into its composition an aliphatic oligoether component. The choice of aliphatic oligoepoxide for the synthesis of guanidinium oligomeric ionic liquids is based on the fact that it is structurally similar to poly - and oligoethylene oxides, which are known to be non-toxic, biodegradable, and reactive oligomeric ionic liquids at elevated temperatures. A new type of reactive oligomeric proton cationic ionic liquid was synthesized by the reaction of oligomeric aliphatic diepoxide with guanidine, followed by neutralization of the product with hydrochloric acid. In this study, the synthesis of proton cationic oligomeric ionic liquids was based on the introduction of guanidinium fragments as end groups of the oligoether aliphatic chain. This reaction is attractive because of the ease of opening the oxirane ring with such a strong nucleophile as guanidine.The reaction forms a fragment with an aliphatic C-N bond, which retains the high basicity of the nitrogen atom. Its structure is characterized by the presence of guanidinium groups at the ends of the aliphatic hydroxyl-containing oligoether chain. The chemical structure of this compound is characterized by IR -, 1H ,13 C NMR spectroscopy methods, and its molecular mass characteristics are determined.The average molecular weight of the synthesized oligomeric ionic liquids is 610 g / mol.The value of the coefficient of polydispersity of the synthesized oligomeric ionic liquids is equal to 1.2. Determination of the content of amino groups in the guanidine-containing oligomer in the basic form by titrometric method allowed to establish that the value found is close to the theoretically calculated value. The synthesized oligomeric proton ionic liquid is characterized by an amorphous structure with two glass transition temperatures. The first lies in the range -70 °C, the second in the region of 70 °C, and the beginning of thermal oxidative destruction is located in the region of 148 °C. The temperature dependence of the ionic conductivity for this compound is nonlinear in the Arrhenius coordinates, which indicates the realization of ionic conductivity mainly due to the free volume in the system. The proton conductivity of this compound is 6.4·10-5–1·10-2Cm/cmin the range of 20–100 °C. The obtained compound exhibits surface-active properties characteristic of classical surfactants, as evidenced by the value of the limiting surface activity – 2.8·102 Nm2 / kmol. The value of CCM is 1.8·10-2 mol/l., and the value of the minimum surface tension – 37.70 mN / m. The synthesized oligomeric ionic liquid is of interest as electrolytes operating under anhydrous conditions, surfactants, disinfectants, and starting reagents for the synthesis of ion-containing blockopolymers.

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7

Zhu, Linyi, Yongqiang Tang, and Yilin Wang. "Constructing Surfactant Systems with the Characteristics of Gemini and Oligomeric Surfactants Through Noncovalent Interaction." Journal of Surfactants and Detergents 19, no. 2 (January 22, 2016): 237–47. http://dx.doi.org/10.1007/s11743-016-1790-2.

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8

Wang, Sheng Qin, Mohit Sharma, and Yew Wei Leong. "Polyamide 11/Clay Nanocomposite Using Polyhedral Oligomeric Silsesquioxane Surfactants." Advanced Materials Research 1110 (June 2015): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.65.

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This paper reports polyamide 11 (PA11)/layered silicate (clay) nanocomposite using polyhedral oligomeric silsesquioxane (POSS) surfactants. POSS functionalized with amino, ammonium and guanidinium groups were synthesized and used to facilitate the intercalation of polymer chains between silicate layers thereby to improve the dispersion of clay in polymer matrix. Nanocomposites from the blends of POSS-modified clay and PA11 were thus formulated via melting compounding and their mechanical and physical properties were characterized.

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9

Lazaridis, N., A. H. Alexopoulos, E. G. Chatzi, and C. Kiparissides. "Steric stabilization in emulsion polymerization using oligomeric nonionic surfactants." Chemical Engineering Science 54, no. 15-16 (July 1999): 3251–61. http://dx.doi.org/10.1016/s0009-2509(98)00336-4.

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10

Fan, Yaxun, and Yilin Wang. "Self-Assembly and Functions of Star-Shaped Oligomeric Surfactants." Langmuir 34, no. 38 (April 4, 2018): 11220–41. http://dx.doi.org/10.1021/acs.langmuir.8b00290.

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11

Akhmedova, G. A. "New oligomeric surfactants based on ethylene glycol and epichlorhydrin." Russian Journal of Applied Chemistry 81, no. 6 (June 2008): 1037–42. http://dx.doi.org/10.1134/s1070427208060220.

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12

Perkins, M. C., D. Briggs, F. J. M. Rutten, C. J. Roberts, and M. C. Davies. "Cationisation of oligomeric alkylethoxylate surfactants in ToF-SIMS analysis." Surface and Interface Analysis 39, no. 7 (2007): 644–47. http://dx.doi.org/10.1002/sia.2568.

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13

Wang, Ling, Demin Wang, Chunde Liu, Simeng Gao, and Wei Ding. "Novel four-arm star oligomeric surfactants: Synthesis and tensioactive properties." Surfaces and Interfaces 8 (September 2017): 97–102. http://dx.doi.org/10.1016/j.surfin.2017.04.007.

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14

Chen, Yao, Fulin Qiao, Yaxun Fan, Yuchun Han, and Yilin Wang. "Interactions of Phospholipid Vesicles with Cationic and Anionic Oligomeric Surfactants." Journal of Physical Chemistry B 121, no. 29 (July 17, 2017): 7122–32. http://dx.doi.org/10.1021/acs.jpcb.7b05297.

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15

Chen, Jian, Min Qiao, Nanxiao Gao, Qianping Ran, Jingzhi Wu, Guangcheng Shan, Shuai Qi, and Shishan Wu. "Cationic oligomeric surfactants as novel air entraining agents for concrete." Colloids and Surfaces A: Physicochemical and Engineering Aspects 538 (February 2018): 686–93. http://dx.doi.org/10.1016/j.colsurfa.2017.11.065.

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16

Holmiere, Sébastien, Romain Valentin, Philippe Maréchal, and Zéphirin Mouloungui. "Esters of oligo-(glycerol carbonate-glycerol): New biobased oligomeric surfactants." Journal of Colloid and Interface Science 487 (February 2017): 418–25. http://dx.doi.org/10.1016/j.jcis.2016.10.072.

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17

White, W. W., and H. Jung. "Surface activity of oligomeric surfactants as function of their composition." Journal of Polymer Science: Polymer Symposia 45, no. 1 (March 8, 2007): 197–207. http://dx.doi.org/10.1002/polc.5070450117.

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18

Garcia, M. Teresa, Isabel Ribosa, Iwona Kowalczyk, Marta Pakiet, and Bogumil Brycki. "Biodegradability and aquatic toxicity of new cleavable betainate cationic oligomeric surfactants." Journal of Hazardous Materials 371 (June 2019): 108–14. http://dx.doi.org/10.1016/j.jhazmat.2019.03.005.

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19

Murguía, Marcelo C., María I. Cabrera, Javier F. Guastavino, and Ricardo J. Grau. "New oligomeric surfactants with multiple-ring spacers: Synthesis and tensioactive properties." Colloids and Surfaces A: Physicochemical and Engineering Aspects 262, no. 1-3 (July 2005): 1–7. http://dx.doi.org/10.1016/j.colsurfa.2005.03.018.

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20

Liang, Yaqin, Hui Li, Dong Liang, and Zhiyong Hu. "Lysine-based oligomeric surfactants with cyanuric chloride: synthesis and micellization properties." Colloid and Polymer Science 293, no. 8 (May 6, 2015): 2209–16. http://dx.doi.org/10.1007/s00396-015-3612-x.

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21

Maksim, Joanna, Karolina Rucinska, Augustyn Molinski, Zuzanna Pietralik, and Maciej Kozak. "Morphology of Gold Nanorods Obtained in the Presence of Oligomeric Surfactants." Biophysical Journal 116, no. 3 (February 2019): 447a. http://dx.doi.org/10.1016/j.bpj.2018.11.2410.

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22

Liu, Pei, Xiaomei Pei, Chaowang Li, Rong Li, Zhao Chen, Binglei Song, Zhenggang Cui, and Danhua Xie. "pH-switchable wormlike micelles with high viscoelasticity formed by pseudo-oligomeric surfactants." Journal of Molecular Liquids 334 (July 2021): 116499. http://dx.doi.org/10.1016/j.molliq.2021.116499.

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23

Jurašin, D., A. Pustak, I. Habuš, I. Šmit, and N. Filipović-Vinceković. "Polymorphism and Mesomorphism of Oligomeric Surfactants: Effect of the Degree of Oligomerization." Langmuir 27, no. 23 (December 6, 2011): 14118–30. http://dx.doi.org/10.1021/la203777c.

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24

Huang, Mingjun, Kan Yue, Jiahao Huang, Chang Liu, Zhe Zhou, Jing Wang, Kan Wu, Wenpeng Shan, An-Chang Shi, and Stephen Z. D. Cheng. "Highly Asymmetric Phase Behaviors of Polyhedral Oligomeric Silsesquioxane-Based Multiheaded Giant Surfactants." ACS Nano 12, no. 2 (January 29, 2018): 1868–77. http://dx.doi.org/10.1021/acsnano.7b08687.

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25

Ibrahim, Naaim M. A., and Brian B. Wheals. "Oligomeric separation of alkylphenol ethoxylate surfactants on silica using aqueous acetonitrile eluents." Journal of Chromatography A 731, no. 1-2 (April 1996): 171–77. http://dx.doi.org/10.1016/0021-9673(95)01190-0.

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26

Wattebled, Laurent, André Laschewsky, Alain Moussa, and Jean-Louis Habib-Jiwan. "Aggregation Numbers of Cationic Oligomeric Surfactants: A Time-Resolved Fluorescence Quenching Study." Langmuir 22, no. 6 (March 2006): 2551–57. http://dx.doi.org/10.1021/la052414h.

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27

Chen, Zhidi, Yao Chen, Linyi Zhu, Yaxun Fan, and Yilin Wang. "Partition and Solubilization of Phospholipid Vesicles by Noncovalently Constructed Oligomeric-like Surfactants." Langmuir 36, no. 30 (July 7, 2020): 8733–44. http://dx.doi.org/10.1021/acs.langmuir.0c00928.

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28

Toh, Cher Ling, Lifei Xi, Soo Khim Lau, Kumari Pallathadka Pramoda, Yang Choo Chua, and Xuehong Lu. "Packing Behaviors of Structurally Different Polyhedral Oligomeric Silsesquioxane-Imidazolium Surfactants in Clay." Journal of Physical Chemistry B 114, no. 1 (January 14, 2010): 207–14. http://dx.doi.org/10.1021/jp908276a.

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29

Su, Xin, Yujun Feng, Biqing Wang, Zhiyong Lu, and Limin Wei. "Oligomeric cationic surfactants prepared from surfmers via ATRP: Synthesis and surface activities." Colloid and Polymer Science 289, no. 1 (November 25, 2010): 101–10. http://dx.doi.org/10.1007/s00396-010-2331-6.

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30

Fu, Huei-Kuan, Shiao-Wei Kuo, Ding-Ru Yeh, and Feng-Chih Chang. "Properties Enhancement of PS Nanocomposites through the POSS Surfactants." Journal of Nanomaterials 2008 (2008): 1–7. http://dx.doi.org/10.1155/2008/739613.

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Polyhedral oligomeric silsesquioxane (POSS)-clay hybrids of polystyrene are prepared by two organically modified clays using POSS-NH2andC20-POSS as intercalated agents. X-ray diffraction (XRD) studies show the formation of these POSS/clay/PS nanocomposites in all cases with the disappearance of the peaks corresponding to the basal spacing of MMT. Transmission electronic microscopy (TEM) was used to investigate the morphology of these nanocomposites and indicates that these nanocomposites are composed of a random dispersion of exfoliated clay platelets throughout the PS matrix. Incorporation of these exfoliated clay platelets into the PS matrix led to effectively increase in glass transition temperature(Tg), thermal decomposition temperature(Td), and the maximum reduction in coefficient of thermal expansion (CTE) is ca. 40% for theC20-POSS/clay nanocomposite.

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31

Shibaev, Andrey V., Andrei A. Osiptsov, and Olga E. Philippova. "Novel Trends in the Development of Surfactant-Based Hydraulic Fracturing Fluids: A Review." Gels 7, no. 4 (December 12, 2021): 258. http://dx.doi.org/10.3390/gels7040258.

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Viscoelastic surfactants (VES) are amphiphilic molecules which self-assemble into long polymer-like aggregates—wormlike micelles. Such micellar chains form an entangled network, imparting high viscosity and viscoelasticity to aqueous solutions. VES are currently attracting great attention as the main components of clean hydraulic fracturing fluids used for enhanced oil recovery (EOR). Fracturing fluids consist of proppant particles suspended in a viscoelastic medium. They are pumped into a wellbore under high pressure to create fractures, through which the oil can flow into the well. Polymer gels have been used most often for fracturing operations; however, VES solutions are advantageous as they usually require no breakers other than reservoir hydrocarbons to be cleaned from the well. Many attempts have recently been made to improve the viscoelastic properties, temperature, and salt resistance of VES fluids to make them a cost-effective alternative to polymer gels. This review aims at describing the novel concepts and advancements in the fundamental science of VES-based fracturing fluids reported in the last few years, which have not yet been widely industrially implemented, but are significant for prospective future applications. Recent achievements, reviewed in this paper, include the use of oligomeric surfactants, surfactant mixtures, hybrid nanoparticle/VES, or polymer/VES fluids. The advantages and limitations of the different VES fluids are discussed. The fundamental reasons for the different ways of improvement of VES performance for fracturing are described.

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32

Qian, Qiangyu, Jun Xu, Mingzu Zhang, Jinlin He, and Peihong Ni. "Versatile Construction of Single-Tailed Giant Surfactants with Hydrophobic Poly(ε-caprolactone) Tail and Hydrophilic POSS Head." Polymers 11, no. 2 (February 12, 2019): 311. http://dx.doi.org/10.3390/polym11020311.

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Giant surfactants refer to a new kind of amphiphile by incorporating functional molecular nanoparticles with polymer tails. As a size-amplified counterpart of small-molecule surfactants, they serve to bridge the gap between small-molecule surfactants and amphiphilic block copolymers. This work reports the design and synthesis of single-tailed giant surfactants carrying a hydrophobic poly(ε-caprolactone) (PCL) as the tail and a hydrophilic cage-like polyhedral oligomeric silsesquioxane (POSS) nanoparticle as the head. The modular synthetic strategy features an efficient ‘‘growing-from’’ and ‘‘click-modification’’ approach. Starting from a monohydroxyl and heptavinyl substituted POSS (VPOSS-OH), a PCL chain with controlled molecular weight and narrow polydispersity was first grown by the ring-opening polymerization (ROP) of ε-CL under the catalysis of stannous octoate, leading to a PCL chain end-capped with heptavinyl substituted POSS (VPOSS-PCL). To endow the POSS head with adjustable polarity and functionality, three kinds of hydrophilic groups, including hydroxyl groups, carboxylic acids, and amine groups, were installed to the periphery of POSS molecule by a high-efficiency thiol-ene “click” reaction. The compounds were fully characterized by NMR, gel permeation chromatography (GPC), MALDI-TOF mass spectrometry, and TGA analysis. In addition, the preliminary self-assembly study of these giant surfactants was also investigated by TEM and dynamic laser light scattering (DLS), which indicated that they can form spherical nanoparticles with different diameters in aqueous solution. This work affords a straightforward and versatile way for synthesizing single-tailed giant surfactants with diverse head surface functionalities.

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33

Chen, Jingrui, Chufen Yang, Jianwei Guo, Dongyu Zhu, Shuqin Fu, Zhe Yang, and Xing Zhong. "Mesoscopic Simulations on the Aggregate Behavior of Oligomeric Adamantane Surfactants in Aqueous Solutions." Tenside Surfactants Detergents 53, no. 2 (March 16, 2016): 120–26. http://dx.doi.org/10.3139/113.110416.

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34

Dazzazi, Anass, Yannick Coppel, Martin In, Christophe Chassenieux, Patrice Mascalchi, Laurence Salomé, Ahmed Bouhaouss, Myrtil L. Kahn, and Fabienne Gauffre. "Oligomeric and polymeric surfactants for the transfer of luminescent ZnO nanocrystals to water." Journal of Materials Chemistry C 1, no. 11 (2013): 2158. http://dx.doi.org/10.1039/c3tc00877k.

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35

Zana, Raoul. "Dimeric and oligomeric surfactants. Behavior at interfaces and in aqueous solution: a review." Advances in Colloid and Interface Science 97, no. 1-3 (March 2002): 205–53. http://dx.doi.org/10.1016/s0001-8686(01)00069-0.

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36

Asadov, Z. G., R. A. Ragimov, and G. A. Akhmedova. "Synthesis, physicochemical characteristics and properties of oligomeric surfactants based on pentaerythritol and propylene oxide." Russian Journal of Applied Chemistry 84, no. 7 (July 2011): 1188–94. http://dx.doi.org/10.1134/s1070427211070111.

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37

Zhou, Chengcheng, Fengyan Wang, Hui Chen, Meng Li, Fulin Qiao, Zhang Liu, Yanbo Hou, et al. "Selective Antimicrobial Activities and Action Mechanism of Micelles Self-Assembled by Cationic Oligomeric Surfactants." ACS Applied Materials & Interfaces 8, no. 6 (February 5, 2016): 4242–49. http://dx.doi.org/10.1021/acsami.5b12688.

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38

Su, Hao, Jukuan Zheng, Zhao Wang, Fei Lin, Xueyan Feng, Xue-Hui Dong, Matthew L. Becker, Stephen Z. D. Cheng, Wen-Bin Zhang, and Yiwen Li. "Sequential Triple “Click” Approach toward Polyhedral Oligomeric Silsesquioxane-Based Multiheaded and Multitailed Giant Surfactants." ACS Macro Letters 2, no. 8 (July 15, 2013): 645–50. http://dx.doi.org/10.1021/mz4002723.

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39

Lazaridis, Nikos, Aleck H. Alexopoulos, and Costas Kiparissides. "Semi-Batch Emulsion Copolymerization of Vinyl Acetate and Butyl Acrylate Using Oligomeric Nonionic Surfactants." Macromolecular Chemistry and Physics 202, no. 12 (August 1, 2001): 2614–22. http://dx.doi.org/10.1002/1521-3935(20010801)202:12<2614::aid-macp2614>3.0.co;2-e.

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40

White, Kathryn A., and Gregory G. Warr. "Linkage by elimination/addition: A simple synthesis for a family of oligomeric alkylpyridinium surfactants." Journal of Colloid and Interface Science 337, no. 1 (September 2009): 304–6. http://dx.doi.org/10.1016/j.jcis.2009.05.003.

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41

Li, Haofei, Fulin Qiao, Yaxun Fan, and Yilin Wang. "Aggregation in the Mixture of Branched Carboxylate Salts and Sulfonate Surfactants with Different Oligomeric Degrees." Acta Chimica Sinica 76, no. 7 (2018): 564. http://dx.doi.org/10.6023/a18030086.

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42

Yoshimura, Tomokazu, Shunsuke Abe, and Kunio Esumi. "Unique Solution Properties of Quaternized Oligomeric Surfactants Derived from Ethylenediamine or G0 Poly (amidoamine) Dendrimers." Journal of Oleo Science 61, no. 12 (2012): 699–706. http://dx.doi.org/10.5650/jos.61.699.

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43

Uner, Ahmet, Erdinc Doganci, Mehmet Atilla Tasdelen, Faruk Yilmaz, and Ayşe Gül Gürek. "Synthesis, characterization and surface properties of star-shaped polymeric surfactants with polyhedral oligomeric silsesquioxane core." Polymer International 66, no. 11 (July 24, 2017): 1610–16. http://dx.doi.org/10.1002/pi.5420.

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44

Moriya, Masafumi, Akira Nishimura, Kazuo Hosoda, Makoto Takai, and Hisao Hidaka. "New amphoteric surfactants containing a 2-hydroxyalkyl group VIII. Synthesis and surface activities for amphoteric oligomeric or polymeric surfactants of β-alanine type." Journal of the American Oil Chemists' Society 63, no. 2 (February 1986): 263–67. http://dx.doi.org/10.1007/bf02546152.

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45

Xu, Xian, Yu Shao, Weijie Wang, Liping Zhu, Hao Liu, and Shuguang Yang. "Fluorinated polyhedral oligomeric silsesquioxanes end-capped poly(ethylene oxide) giant surfactants: precise synthesis and interfacial behaviors." Polymer 186 (January 2020): 122055. http://dx.doi.org/10.1016/j.polymer.2019.122055.

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46

Kimura, Tatsuo, and Kazumi Kato. "Simple removal of oligomeric surfactants and triblock copolymers from mesostructured precursors of ordered mesoporous aluminum organophosphonates." Microporous and Mesoporous Materials 101, no. 1-2 (April 2007): 207–13. http://dx.doi.org/10.1016/j.micromeso.2006.10.015.

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47

Mengerink, Y., H. C. J. De Man, and Sj Van Der Wal. "Use of an evaporative light scattering detector in reversed-phase high-performance liquid chromatography of oligomeric surfactants." Journal of Chromatography A 552 (August 1991): 593–604. http://dx.doi.org/10.1016/s0021-9673(01)95975-8.

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48

Ma, Zeying, Mao Chen, and J. Edward Glass. "Adsorption of nonionic surfactants and model HEUR associative thickeners on oligomeric acid-stabilized poly(methyl methacrylate) latices." Colloids and Surfaces A: Physicochemical and Engineering Aspects 112, no. 2-3 (July 1996): 163–84. http://dx.doi.org/10.1016/0927-7757(95)03494-3.

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49

Hossain, Md D., Youngjae Yoo, and Kwon T. Lim. "Synthesis of poly(ε-caprolactone)/clay nanocomposites using polyhedral oligomeric silsesquioxane surfactants as organic modifier and initiator." Journal of Applied Polymer Science 119, no. 2 (July 29, 2010): 936–43. http://dx.doi.org/10.1002/app.32791.

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Yue, Kan, Mingjun Huang, Ryan L. Marson, Jinlin He, Jiahao Huang, Zhe Zhou, Jing Wang, et al. "Geometry induced sequence of nanoscale Frank–Kasper and quasicrystal mesophases in giant surfactants." Proceedings of the National Academy of Sciences 113, no. 50 (November 28, 2016): 14195–200. http://dx.doi.org/10.1073/pnas.1609422113.

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Abstract:

Frank–Kasper (F-K) and quasicrystal phases were originally identified in metal alloys and only sporadically reported in soft materials. These unconventional sphere-packing schemes open up possibilities to design materials with different properties. The challenge in soft materials is how to correlate complex phases built from spheres with the tunable parameters of chemical composition and molecular architecture. Here, we report a complete sequence of various highly ordered mesophases by the self-assembly of specifically designed and synthesized giant surfactants, which are conjugates of hydrophilic polyhedral oligomeric silsesquioxane cages tethered with hydrophobic polystyrene tails. We show that the occurrence of these mesophases results from nanophase separation between the heads and tails and thus is critically dependent on molecular geometry. Variations in molecular geometry achieved by changing the number of tails from one to four not only shift compositional phase boundaries but also stabilize F-K and quasicrystal phases in regions where simple phases of spheroidal micelles are typically observed. These complex self-assembled nanostructures have been identified by combining X-ray scattering techniques and real-space electron microscopy images. Brownian dynamics simulations based on a simplified molecular model confirm the architecture-induced sequence of phases. Our results demonstrate the critical role of molecular architecture in dictating the formation of supramolecular crystals with “soft” spheroidal motifs and provide guidelines to the design of unconventional self-assembled nanostructures.

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