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중금속 흡차능을 가지고 Chelate Resin의 합성
홍성일,전동원,서정옥,Hong, Seong-Il,Jeon, Dong-Won,Seo, Jeong-Ok 한국섬유공학회 1984 한국섬유공학회지 Vol.21 No.2
In this paper, two major interests, -i.e., synthesis of chloromethylstyrene, and transformation of crosslinked chlormethylpolystyrene into chelating resin-were extensively dealt. first of all, newer method for the preparation of pure o-, m- and p-chloromethylstyrene was investigated. Bromoethylbenzene was chloromethylated by conventional chloromethylation technique yielding mixture of isomers of o-, m-, and p-chloromethylbromoethylbenzene, then this mixture was fractionated preparatively as o-, and p-chloromethylbromoethylbenzene by silica fraction analysis method. This obtained o-, and p-isomers were dehydrobrominated respectively yielding o-, and p-chlormethylstyrene. Then this isomeric chloromethyl-styrene was analyzed by HPLC respectively. In the second place, crosslinked chloromethylpolystyrene beads were prepared directly from the polymerization of chloromethylpolystyrene were transformed into polyethyleneimine ligand type chelate resin by the cationic ring-opening graft copolymerization of 2-methyl-2-oxazoline on to chloromethylpolystyrene. Chelating abilities and capacities of these resins for various metals were extensively discussed and the structural effect of the resin bead on chelating capacities were detailed.
인산화 가교 키토산의 합성 및 금속이온 흡착 특성(I)-키토산의 가교 및 인산화 반응-
이종순,홍성일전동원 한국섬유공학회 1994 한국섬유공학회지 Vol.31 No.12
Chitosan. a natural biodegradable polymer, was crosslinked with epichlorohydrin in alkaline condition and phosphorylated with P2O5 in methanesulfonic acid to use as a chelating polymer. Insolubility of crosslinking reaction product in acidic solution confirmed that crosslinking was occurred favorably by epichlorohydrin and it was proved that a swelling ratio of crosslinked chitosan(c-chitosan) in acetic acid solution could be thought as a measure of degree of crosslinking. Crofslinking mechanism was presumed from the various crosslinking methods. The effects of crosslinking ratio and phosphorylation conditions(amount of phosphorus-pentoxide, temperature and time) on the phosphorylation of c-chitosan were investigated.