多孔半互穿温敏水凝胶的制备及其性能研究  

Synthesis and properties of porous semi-interpenetrating thermosensitive hydrogels

作　　者：杨毅[1] 李丽霞[1] 吕保和[1] 陈园园[1] 张鑫鑫[1] 李川蔚 汪能[1] 周到[1] YANG Yi LI Li-xia LV Bao-he CHEN Yuan-yuan ZHANG Xin-xin LI Chuan-wei WANG Neng ZHOU Dao(School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China)

机构地区：[1]江苏大学环境与安全工程学院,江苏镇江212013

出　　处：《现代化工》2017年第8期104-108,共5页Modern Chemical Industry

基　　金：国家自然科学青年基金项目(51508233);江苏省大学生创新创业训练项目(201610299060Y)

摘　　要：以N-异丙基丙烯酰胺(NIPAm)为单体,聚乙二醇(PEG)为致孔剂,聚甲基丙烯酸-β-羟乙酯(PHEMA)为第2网络物质,制备了多孔半互穿温敏水凝胶。考察了不同分子质量致孔剂(PEG1000、PEG1500、PEG2000)、致孔剂质量、交联剂BIS质量、PHEMA/NIPAm质量比对凝胶结构和性能的影响。并用FT-IR、SEM、DSC、BET和称重法对凝胶进行性能测试。结果表明,最佳制备条件为:m(PHEMA)/m(NIPAm)=0.25,BIS质量为单体总质量的2.67%,PEG分子质量为1 000~2 000,PEG质量为单体总质量的40%。凝胶孔径为10~20μm,室温20℃下20 min凝胶可以吸收60%以上水分,90 min可以达到溶胀平衡,50℃下10 min内失去90%以上的水分,其LCST在35.8℃左右。By using N-isopropylacrylamide（ NIPAm） as monomer,polyethylene glycol（ PEG） as porogenic agent,poly（ methylacrylic acid-beta hydroxy ethyl ester）（ PHEMA） as second network substance,the thermosensitive porous semi-interpenetrating network hydrogels are prepared.Effects of different molecular weight porogenic agents（ PEG1000,PEG1500,PEG2000）,dosage of porogenic agent,crosslinker dosage and mass ratio of PHEMA/NIPAm on hydrogels structure and properties are investigated. The prepared hydrogels are characterized by FT-IR,SEM,DSC,BET and gravimetric method.The optimal preparation conditions are： m（ PHEMA）/m（ NIPAm） = 0. 25（ weight ratio）,crosslinker dosage accounting 2. 67% of total monomer,PEG molecular weight in the range of 1 000-2 000,and PEG dosage accounting 40% of total monomer. It is detected that pore sizes of hydrogels are 10-20 microns. At room temperature20℃,the hydrogels can absorb more than 60% of water in 20 minutes,and can reach swelling equilibrium in 90 minutes.The hydrogels can lose more than 90% of water at 50℃ in 10 minutes. The lower critical solution temperature is about 35. 8℃.

关 键 词：N-异丙基丙烯酰胺 聚甲基丙烯酸-β-羟乙酯 多孔半互穿网络 温敏性 孔洞结构 

分 类 号：O632[理学—高分子化学]