期刊
JOURNAL OF APPLIED POLYMER SCIENCE
卷 89, 期 8, 页码 2277-2282出版社
JOHN WILEY & SONS INC
DOI: 10.1002/app.12478
关键词
gelatin; zero-order release; riboflavin; colon; crosslinking
Hard gelatin capsules, containing riboflavin-loaded poly (N-vinyl-2-pyrrolidone)-polyacrylamide cylindrical hydrogels, were modified chemically by treating with an aqueous formaldehyde solution for the purpose of delayed release of drug along the gastrointestinal tract. The t(dis) (disintegration time) of capsules was studied as a function of concentration of formaldehyde solution and the treatment time. The dynamic release of vitamin B-2 was studied as a function of crosslinking ratio of the hydrogels. The device studied seems to have potential to be used for colon-targeted drug delivery. (C) 2003 Wiley Periodicals, Inc.
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