A facile method to prepare a polyethylene glycol modified polysilane as a waterborne photoinitiator

Liang, Qiuhong; Zhang, Liping; Xiong, Ying; Wu, Qingqing; Tang, Hongding

doi:10.1016/j.jphotochem.2014.11.006

Cited by 29 publications

(12 citation statements)

References 44 publications

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“…One of the basic methods for increasing the solubility of traditional radical photoinitiators is their chemical modification, which consists of adding appropriate groups to the structure of the photoinitiator [88] [89-91]. The groups designated for this purpose are: non-ionic ethers, polyethers, hydroxyethers [92], ionic substitutes such as quaternary ammonium salts, sulphonates, carboxylic acids, and thiosulphates [93][94][95]. The most common solubilising group is the hydroxyl group, which can be found in the most popular water-soluble initiator: Irgacure 2959 -2-hydroxy-1-[4-(2-hydroxyethoxy) phenyl]-2-methyl-1-propanone.…”

Section: α-Hydroxyketones and Their Derivativesmentioning

confidence: 99%

Water-Soluble Photoinitiators in Biomedical Applications

2020

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Light-initiated polymerization processes are currently an important tool in various industrial fields. The advancement of technology has resulted in the use of photopolymerization in various biomedical applications, such as the production of 3D hydrogel structures, the encapsulation of cells, and in drug delivery systems. The use of photopolymerization processes requires an appropriate initiating system that, in biomedical applications, must meet additional criteria such as high water solubility, non-toxicity to cells, and compatibility with visible low-power light sources. This article is a literature review on those compounds that act as photoinitiators of photopolymerization processes in biomedical applications. The division of initiators according to the method of photoinitiation was described and the related mechanisms were discussed. Examples from each group of photoinitiators are presented, and their benefits, limitations, and applications are outlined.

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Section: α-Hydroxyketones and Their Derivativesmentioning

confidence: 99%

Water-Soluble Photoinitiators in Biomedical Applications

2020

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“…UV-curing technology has drawn more and more attention in many fields such as coatings [ 1 , 2 , 3 , 4 , 5 ], 3D printing [ 6 , 7 ], biomaterials [ 8 ] because of its environmentally friendly and high efficiency advantages. A conventional UV-curing system usually is a composition of UV-curable polymers, reactive monomers, additives, and a photoinitiator or photoinitiator system [ 9 ]. The UV initiator or initiator system is critical because it determines the UV-curing speed and significantly affects the comprehensive performance of cured materials such as yellowing, odor, migration, etc., [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…The UV initiator or initiator system is critical because it determines the UV-curing speed and significantly affects the comprehensive performance of cured materials such as yellowing, odor, migration, etc., [ 9 , 10 , 11 , 12 ]. Small molecule UV photoinitiators such as benzoin, acetophenone, α-hydroxy ketone, benzophenone, thioxanthone, and their derivatives have been widely used [ 6 , 8 , 9 , 10 , 11 , 12 ], however, their obviously disadvantages such as relatively strong odor and high migration from cured films greatly limit their applications [ 10 , 13 , 14 , 15 , 16 , 17 , 18 ]. Especially, the unreacted small molecule photoinitiator molecules and photolysis products can migrate to the surface of post-cured material or may be extracted into liquid-packed goods when the UV-cured materials were applied in food packaging [ 14 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

High Efficiency and Low Migration Hyperbranched Silicone Contain Macrophotoinitiators for UV-Cured Transparent Coatings

Fan

Song

et al. 2020

Polymers

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A kind of hyperbranched silicone containing macrophotoinitiators (HBSMIs) were synthesized from 2-hydroxy-2-methyl-1-phenyl propanone (HMPP) and the UV-curing behaviors of HBSMIs were investigated in UV-cured transparent polyurethane-acrylate (PUA) coatings. HBSMIs show higher UV-initiating efficiency than HMPP. The migration of HBSMIs from the UV-cured coatings can be as low as 1.7–6.0 wt%, which is obviously lower than the migration of HMPP. There is a remarkable improvement of the tensile strength of the UV-cured materials initiated by HBSMI in comparison to that of the materials prepared with the same PUA initiated by HMPP. Especially for the UV-cured materials prepared from PUA with 20 wt% 1,1,1-tris(hydroxymethyl)propane (TMP), the tensile strength and the strain at break increased from 6.81 MPa to 12.14 MPa and from 43.0% to 71.9%, respectively. The fraction of improvement for the tensile strength and the strain at break is as high as 78.9% and 67.2%, respectively. The coatings prepared with HBSMI also have better UV resistance ability than those coatings prepared with HMPP because they turn slightly yellow when they are aged by UV for about 15 min while the coating prepared with 4 wt% of HMPP will turn yellow only aged by UV for 2 min. These results suggest that preparation hyperbranched silicone containing macrophotoinitiators will be one of the good strategies to improve the curing efficiency of the UV-curing system, reduce the migration of UV initiator from cured material, improve the mechanical and UV resistance performance of UV-cured materials.

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“…[1][2][3][4][5][6] The photoinitiator plays a critical role in controlling photopolymerization rate, and the feature of the photoinitiator directly affects other aspects of the formulation. At present, watersoluble small-molecular photoinitiators deriving from conventional photoinitiators involving benzoin, acetophenone, thioxanthone, α-hydroxyketone, and benzophenone have some apparent drawbacks such as high migration from cured films, relatively strong odor and yellowing, which strongly limit their applications.…”

Section: Introductionmentioning

confidence: 99%

Photoinitiability of a water-borne polysiloxane-modified benzophenone macromolecular photoinitiator

Zhang

Cao

et al. 2016

Journal of Adhesion Science and Technology

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a state Key laboratory of chemical resource engineering, Beijing university of chemical Technology, Beijing, P.r. china; b college of science, Beijing university of chemical Technology, Beijing, P.r. china ABSTRACT This paper reported a water-borne polysiloxane-modified benzophenone macromolecular photoinitiator (WPSHBP), whose characteristics of the photopolymerization, the migration of photolysis fragments, the volatility, and reduction of oxygen inhibition were discussed in detail. WPSHBP has a maximum absorption peak at 286 nm, and the molar extinction coefficient (ε 286 nm ) is 23200 M −1 cm −1 . The photopolymerization rate and final double bond conversion of the system initiated by WPSHBP were enhanced with the increasing contents of triethanolamine (TEOA) and WPSHBP and irradiation intensity. WPSHBP exhibits a low migration of photolysis fragments and volatility compared with small-molecular photoinitiator benzophenone (BP). The cured films initiated by WPSHBP have good mechanical properties and thermostability compared with that by 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959). More importantly, the water-borne polysiloxanemodified photoinitiator can mitigate the oxygen inhibition in radical photopolymerization due to its enrichment on the surface of the photopolymerization system.

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A facile method to prepare a polyethylene glycol modified polysilane as a waterborne photoinitiator

Cited by 29 publications

References 44 publications

Water-Soluble Photoinitiators in Biomedical Applications

Water-Soluble Photoinitiators in Biomedical Applications

High Efficiency and Low Migration Hyperbranched Silicone Contain Macrophotoinitiators for UV-Cured Transparent Coatings

Photoinitiability of a water-borne polysiloxane-modified benzophenone macromolecular photoinitiator

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