聚N-异丙基丙烯酰胺/类水滑石复合水凝胶的制备及温敏性  

Synthesis and Thermosensitivity of Poly( N-isopropylacrylamide)/Hydrotalite Hydrogel

作　　者：段元首 贾凤霞 王朔 李丽芳[1] 

机构地区：[1]山东农业大学化学与材料科学学院,山东泰安271018 [2]山东省乡镇企业建材质量监督检验中心,山东泰安271000

出　　处：《应用化学》2018年第1期102-108,共7页Chinese Journal of Applied Chemistry

基　　金：山东省科技发展计划(2013GZX20109)资助~~

摘　　要：以类水滑石(LDHs)和N-异丙基丙烯酰胺(NIPA)为原材料,采用自由基引发聚合制得了有机无机PNIPA/LDHs温度敏感复合水凝胶。通过热重分析仪(TGA)、示差扫描量热仪(DSC)和扫描电子显微镜(SEM)等技术手段表征了材料的结构和性能。结果表明,PNIPA/LDHs复合水凝胶在33℃左右可实现溶胶-凝胶的可逆性变化,LDHs质量分数基本不影响复合水凝胶的胶凝化温度和胶凝时间。LDHs添加可使PNIPA/LDHs复合水凝胶的热稳定性较NIPA有大幅度提升。随LDHs质量分数及n(Mg)∶n(Al)的增加,复合凝胶的吸热峰值稍有增加。所合成PNIPA/LDHs复合水凝胶表面粗糙不平,具有一定的孔洞结构。To obtain thermosensitive and injectable hydrogels, hydrotalcite （LDHs） and N-isopropylacrylamide （NIPA） were used to synthesize a series of PNIPA/LDHs hydrogels by free radical polymerization. The properties of PNIPA/LDHs hydrogels were characterized by thermal gravimetric analyzer （ TGA）, differential scanning calorimetry（DSC） and scanning electronic microscopy（SEM）. The results show that the synthesized hydrogels have a reversible sol-gel transformation around 33℃. LDHs mass ratios have no influence on the temperature and time of gelation. The thermal stability of PNIPA/LDHs is remarkably increased by the addition of LDHs. The endothermic peak of PNIPA/LDHs hydrogels increases with the increase of LDHs mass ratios and the molar ratio of Mg to Al. PNIPA/LDHs hydrogels have porous structures.

关 键 词：聚N-异丙基丙烯酰胺 类水滑石 水凝胶 温敏性 

分 类 号：O648[理学—物理化学]