Process of directly synthetizing pH sensitive aquagel polymerized by UV radiation
Title：
Process of directly synthetizing pH sensitive aquagel polymerized by UV radiation
Application Number：
 200610011467
Application Date：
 2006/03/10
Announcement Date：
 2006/09/20
Pub. Date：
Publication Number：
 1834111
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C08F 2/46, C08F 20/06, C08F 22/06, C08F 2/10
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Ruan Weiqing, Liu Bin, Wang Xiaogong
Key Words：
 directly synthetizing, pH sensitive aquagel polymerized, UV radiation
Abstract：
 This invention relates to a method to directly synthesize pH sensitive hydrogel by ultraviolet irradiation polymerization, which is attributed to the technology of preparing pH sensitive hydrogel materials. Monomers, cross-linking reagent, additives and photoinitiators are dissolved in deionized water together at certain mass fractions and the solution is irradiated in ultraviolet light for direct cross-linking polymerization into a cross-linking polymer. The cross-linking polymer is dried and pH sensitive hydrogel is obtained. The swelling ability of the hydrogel in aqueous solution changes with pH value and reaches a maximum at the pH value range of 6~8. By varying the species and content of the additives in raw materials, equilibrium swelling coefficient and mechanical strength of the hydrogel can be adjusted for different applications. This invention has the advantages of simple technique, high polymerization efficiency, open operation at room temperature and ambient pressure, no waste liquid pollution and low cost.
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