摘要
以等质量的物理交联剂锂皂石(hectorite)和化学交联剂亚甲基双丙烯酰胺(MBA)共同作为交联剂制备了聚异丙基丙烯酰胺水凝胶。该复合交联剂改善了仅用MBA交联制备的水凝胶的脆性和透光性,储能模量(E′)约为单独使用亚甲基双丙烯酰胺(MBA)和hectorite制备的水凝胶的储能模量之和的一半,体积相转变温度(VPTT)仍在32℃左右,和单独使用MBA和hectorite制备的水凝胶的VPTT相一致,但内部形态和溶胀度更多地取决于化学交联剂MBA的使用。
Physical cross-linker hectorite and chemical cross-linker N,N＇-methylene-bis-acrylamide（MBA） with same mass were used together to prepare poly（N-isopropylacrylamide） hydrogel. The brittleness and poor transmittance of hydrogel simply using MBA as cross-linker were improved by multiple adoption of both hectorite and MBA. The storage modulus of hydrogel using both cross-linkers is half total storage modulus of hydrogels cross-linked by MBA and hectorite. In addition,the volume phase transition temperature（VPTT） of multi-cross-linked hydrogel keeps at 32 ℃ or so,which is consistent with the hydrogels by using hectorite or MBA as exclusive cross-linker. More importantly,the interior shape and swelling ratio mainly depend on the adoption of chemical cross-linker MBA.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第9期80-83,88,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20774064)
教育部科学技术研究重点项目(209005)
关键词
水凝胶
锂皂石
亚甲基双丙烯酰胺
异丙基丙烯酰胺
体积相转变温度
hydrogel
hectorite
N
N＇-methylene-bis-acrylamide
N-isopropylacrylamide
volume phase transition temperature
