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Relevant bibliographies by topics / Photo-induced crosslinking

Academic literature on the topic 'Photo-induced crosslinking'

Author: Grafiati

Published: 14 March 2023

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Journal articles

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Journal articles on the topic "Photo-induced crosslinking"

1

Wang, Gang, Xiaodong Cao, Hua Dong, Lei Zeng, Chenxi Yu, and Xiaofeng Chen. "A Hyaluronic Acid Based Injectable Hydrogel Formed via Photo-Crosslinking Reaction and Thermal-Induced Diels-Alder Reaction for Cartilage Tissue Engineering." Polymers 10, no. 9 (August 27, 2018): 949. http://dx.doi.org/10.3390/polym10090949.

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A hyaluronic acid (HA) based injectable hydrogel with gradually increasing mechanical properties was synthesized via photo-crosslinking reaction and thermal-induced Diels-Alder (DA) reaction. The injectable hydrogel can quickly gelate within 30 s by photo-crosslinking of HA-furan under the catalysis of lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP). This injectable property is beneficial to keep the encapsulated cell activity and convenient for clinical operation. And the mechanical properties can be control from 4.86 to 10.66 kPa by exposure time. Then, the thermal-induced DA click chemistry further occurs between furan groups and maleimide groups which gradually promoted the crosslinking density of the injectable hydrogel. The mechanical properties of the injectable hydrogel can be promoted to 21 kPa. ATDC-5 cells were successfully encapsulated in the injectable hydrogel and showed good activity. All the results suggested that the injectable hydrogel with gradually increasing mechanical properties formed by photo-crosslinking reaction and thermal-induced DA reaction has a good prospect of application in cartilage tissue engineering.

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2

Kang, Yeyoung, Jae Hak Kim, Seo Young Kim, Won-Gun Koh, and Hyun Jong Lee. "Blue Light-Activated Riboflavin Phosphate Promotes Collagen Crosslinking to Modify the Properties of Connective Tissues." Materials 14, no. 19 (October 3, 2021): 5788. http://dx.doi.org/10.3390/ma14195788.

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Reduced amounts of collagen and fragmented collagen fibers are characteristics of aging skin. Recently, user-friendly, at-home personal aesthetic devices using light-emitting diode (LED) light have been used for cost-effective and safe skin improvement. However, to dramatically improve the skin via collagen repair, we need to develop an LED-responsive photosensitizer. Corneal collagen crosslinking uses ultraviolet light to activate riboflavin phosphate (RFP) and is used in ophthalmology. RFP is a biocompatible photosensitizer derived from vitamin B2. This study aimed to prove that RFP combined with blue light (BL) can increase collagen crosslinking density, improving its mechanical properties in skin tissue and enhancing skin elasticity. We confirmed the RFP-induced photo-crosslinking in pure collagen by studying changes in its dynamic modulus and matrix morphology using collagen hydrogels. We also measured the changes in the mechanical properties after applying photo-crosslinking on porcine skin. The Young’s modulus (1.07 ± 0.12 MPa) and tensile strength (11.04 ± 1.06 MPa) of the porcine skin after photo-crosslinking were 2.8 and 3.5 times better compared to those of normal porcine skin, respectively. Thus, photo-crosslinking through RFP and BL irradiation can be potentially used for skin improvement using aesthetic LED devices.

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3

Radl, Simone Viola, Meinhart Roth, Martina Gassner, Archim Wolfberger, Andreas Lang, Benjamin Hirschmann, Gregor Trimmel, Wolfgang Kern, and Thomas Griesser. "Photo-induced crosslinking and thermal de-crosslinking in polynorbornenes bearing pendant anthracene groups." European Polymer Journal 52 (March 2014): 98–104. http://dx.doi.org/10.1016/j.eurpolymj.2013.10.024.

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4

Piening, Niklas, Petra Weber, Tobias Högen, Michael Beekes, Hans Kretzschmar, and Armin Giese. "Photo-induced crosslinking of prion protein oligomers and prions." Amyloid 13, no. 2 (January 2006): 67–77. http://dx.doi.org/10.1080/13506120600722498.

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5

Croutxé-Barghorn, C., O. Soppera, and D. J. Lougnot. "Fabrication of microlenses by direct photo-induced crosslinking polymerization." Applied Surface Science 168, no. 1-4 (December 2000): 89–91. http://dx.doi.org/10.1016/s0169-4332(00)00597-3.

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6

Craig, I. H., J. R. White, A. V. Shyichuk, and I. Syrotynska. "Photo-induced scission and crosslinking in LDPE, LLDPE, and HDPE." Polymer Engineering & Science 45, no. 4 (2005): 579–87. http://dx.doi.org/10.1002/pen.20313.

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7

Bilici, Çiğdem, Asena G. Tatar, Efsun Şentürk, Caner Dikyol, and Bahattin Koç. "Bisulfite-initiated crosslinking of gelatin methacryloyl hydrogels for embedded 3D bioprinting." Biofabrication 14, no. 2 (February 9, 2022): 025011. http://dx.doi.org/10.1088/1758-5090/ac4dd9.

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Abstract Recent studies on three-dimensional (3D) bioprinting of cell-laden gelatin methacryloyl (GelMA) hydrogels have provided promising outcomes for tissue engineering applications. However, the reliance on the use of photo-induced gelation processes for the bioprinting of GelMA and the lack of an alternative crosslinking process remain major challenges for the fabrication of cell-laden structures. Here, we present a novel crosslinking approach to form cell-laden GelMA hydrogel constructs through 3D embedded bioprinting without using any external irradiation that could drastically affect cell viability and functionality. This approach consists of a one-step type of crosslinking via bisulfite-initiated radical polymerization, which is combined with embedded bioprinting technology to improve the structural complexity of printed structures. By this means, complex-shaped hydrogel bio-structures with cell viability higher than 90% were successfully printed within a support bath including sodium bisulfite. This study offers an important alternative to other photo-induced gelation processes to improve the bio-fabrication of GelMA hydrogel with high cell viability.

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8

Jamaluddin, Jamarosliza, and Myung Cheon Lee. "Curing Properties of UV-Cured Pressure Sensitive Adhesives." Advanced Materials Research 812 (September 2013): 131–37. http://dx.doi.org/10.4028/www.scientific.net/amr.812.131.

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In this study the effect of trimethylopropane triacrylate (TMPTA) content as a crosslinking agent on curing properties of UV-cured pressure sensitive adhesives (PSAs) was investigated. The curing properties were studied using gel fraction determination, photo-differential scanning calorimetry (photo-DSC) and Fourier transform infraredattenuated total reflection (FTIR-ATR) spectroscopy. Gel fraction sharply increased after expose to UV irradiation and increased with increasing TMPTA content. Moreover, the addition of TMPTA as crosslinking agent induced an earlier onset of auto acceleration and relative concentration of the C=C was not zero because they were trapped in the PSAs network.

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9

Shin, Dong Myung. "The Surface Morphology Effects on Liquid Crystal Alignment After Photo-Agitation and Crosslinking of Polyimide." Journal of Nanoscience and Nanotechnology 20, no. 8 (August 1, 2020): 5112–16. http://dx.doi.org/10.1166/jnn.2020.17848.

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The photo-reactive activators are highly reactive radical generators upon the ultraviolet (UV) light illumination. The photo-reactive initiators produced nitrogen radical and alkyl radical after releasing carbon dioxide. The radicals could react with polyimide (PI) main chains. These reactions enforced the alignment layers and exhibited high azimuthal anchoring energy. The thickness of photo-irradiated PI alignment layers were reduced dramatically by photo-induced crosslinking, which induced surface wrinkling and roughness. The carbon dioxide gases released from the thin films produced many micro-pores, which provides tight anchoring of liquid crystal (LC) molecules. The azimuthal anchoring energy obtain by photo-alignment was better than that obtain by rubbing method with the same PI. The maximum value was 6.92×10−5 J/m2. Small aliphatic hydrocarbons, such as methane and propene, were released during photo-decomposition reaction from the PI surface. The polarity of film surface became more hydrophilic. The photo-alignment of LC was perpendicular to the polarization axis of UV light. On the basis of high anchoring energy, the rough surface, hydrophilic surface, and rapid photo-reactions, the photo-alignment mechanism is proposed.

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10

Zeng, Jun, Haoqing Hou, Joachim H. Wendorff, and Andreas Greiner. "Photo-Induced Solid-State Crosslinking of Electrospun Poly(vinyl alcohol) Fibers." Macromolecular Rapid Communications 26, no. 19 (October 6, 2005): 1557–62. http://dx.doi.org/10.1002/marc.200500545.

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