Sunlight activated film forming adhesive polymers

Polyamine–Diazirine Conjugates for Use as Primers in UHMWPE–Epoxy Composite Materials

“…We and others have shown that diazirine-based reagents can be useful for cross-linking and/or functionalizing low-functionality commodity polymers, including polyethylene (Figure A). − The diazirine group can be activated thermally (by treatment with temperatures above 100 °C) or photochemically (by excitation with 350–365 nm light), , or else through the application of an electric potential (−1.6 V vs Ag/AgCl) or through the use of a photosensitizer. , In all cases, high-energy carbenes are produced, which engage in promiscuous C–H insertion reactions along the aliphatic backbone of the polymer. This process, which results in the installation of strong covalent linkages to the polymer surface, can be harnessed to irreversibly link dyes and photosensitizers to polymers and can also be exploited in fabric strengthening and adhesion applications…”

Injectable, shear-thinning, photocrosslinkable, and tissue-adhesive hydrogels composed of diazirine-modified hyaluronan and dendritic polyethyleneimine

“…59 Iridium photocatalysts have also been reported to allow photoreaction of diazirine with blue visible light at 445 nm, 60 avoiding the use of UV-A, as well as the possibility of using diazirine as an adhesive that does not react in room light but does react in sunlight. 61 Finally, the use of diazirine-based photocurable tissue adhesives for the fixation of transparent bone pins was reported as a potential medical application. 62 Considering that recent studies have demonstrated the safety and biocompatibility of diazirine-based light-cured tissue adhesives, which have long been pointed out, 63 the HA–DAZ reported in this study is a diazirine conjugate with HA, which is widely used in the body.…”

Recent advances on phenothiazine-based oxime esters as visible light photoinitiators of polymerization

“…[1][2][3][4][5] This is particularly true if sunlight or daylight can be used to initiate the polymerization processes. [6][7][8][9][10][11][12][13][14][15] Advantages of photopolymerization compared to the thermal polymerization are numerous. For instance, an excellent spatial and temporal control can be obtained and this property can be cited as ones of the most interesting features of photopolymerization.…”