Method of sequestering metals using thiosulfate polymers
A technology of thiosulfate and polymer, which is applied in the direction of photosensitive materials used in photomechanical equipment, photoplate making process of patterned surface, instruments, etc., can solve the problems of no photochemical method, etc., and achieve persistent improvement and resolution Large and low mobility effects
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Embodiment 1
[0285] Embodiment 1 of the present invention: Photopatterned thiosulfate polymer composition coating
[0286] To 1 ml of an 11 wt % solution of poly(vinylbenzylthiosulfate sodium salt-co-methyl methacrylate) (prepared in Synthesis 1) in water was added 0.066 wt % of 4-phenyl- N-ethoxypyridinium hexafluorophosphate (PS-12 of the electron-accepting photosensitizer component), 1.1% by weight of tetrabutylammonium chloride and 1 ml of tetrahydrofuran, and then spin-coat it on a glass plate at 1000 rpm on the support. The resulting coating is protected from UV and blue light at all times. The coating was then dried on a hot plate at 50° C. for 5 minutes. The coating was then exposed for 10 seconds through a mask using a mercury lamp and subsequently rinsed with water, followed by acetone. The exposed areas of the coating on the glass plate become insoluble (cross-linked), forming an image corresponding to the mask, while the non-cross-linked thiosulfate polymerizes in the unex...
Embodiment 2
[0288] Embodiment 2 of the present invention: Demonstration of photoinduced electron transfer
[0289] To 1ml of poly(vinylbenzyl thiosulfate sodium salt-co-methyl methacrylate-co-acrylic acid-co-N-butyl-N'-[2-(ethoxy-2-acrylate) Ethyl]-1,4,5,8-naphthalenetetracarboxylic acid diimide) (prepared in thiosulfate polymer 5) was added 1 ml of tetrahydrofuran to a 2% by weight solution in water, and then with 1000rpm The resulting solution was spin-coated on a glass plate support. The resulting coating was kept protected from UV and blue light and dried on a hot plate at 50°C for 5 minutes. Absorption spectra of the coatings were recorded before and after exposure. After exposure, the characteristic absorption spectrum of the naphthalene diimide radical anion was observed (compared to the true spectrum generated chemically). The formation of the naphthalimide radical anion was accompanied by photocrosslinking, as evidenced by the solubility change of the coating.
[0290] Thes...
Embodiment 3
[0291] Embodiment 3 of the present invention: Photopatterned thiosulfate polymer composition coating
[0292] To 1ml of poly(vinylbenzyl thiosulfate sodium salt-co-methyl methacrylate-co-acrylic acid-co-N-butyl-N'-[2-(ethoxy-2-acrylate) Ethyl]-1,4,5,8-naphthalenetetracarboxylic acid diimide) (prepared as described above as thiosulfate polymer 4) in water was added 1 ml of tetrahydrofuran, and The composition was spin coated on a glass plate substrate at 1000 rpm. The coating was kept protected from UV and blue light, and then dried on a hot plate at 50°C for 5 minutes. The dried composition coating was exposed through a mask with a Hg lamp for 6 seconds and then rinsed with water followed by acetone. The exposed areas of the composition coating on the glass plate substrate become insoluble (crosslinked), forming the image of the mask, while the non-crosslinked thiosulfate in the unexposed areas of the dried coating Polymer is washed away.
[0293] These results indicate ...
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