水溶性Janus型POSS的制备及对PAA/PAM水凝胶性能的影响  

Preparation of water-soluble Janus-type POSS and its effect on properties of PAA/PAM hydrogel

作　　者：张晓静 冯文博 刘博 卫王冲 樊凯奇 ZHANG Xiaojing;FENG Wenbo;LIU Bo;WEI Wangchong;FAN Kaiqi(Henan Provincial Key Laboratory of Surface and Interface Science,College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,Henan,China)

机构地区：[1]郑州轻工业大学材料与化学工程学院,河南省表界面科学重点实验室,河南郑州450001

出　　处：《精细化工》2022年第7期1360-1368,共9页Fine Chemicals

基　　金：国家自然科学基金项目(U1704160,20804041);河南省自然科学基金(202300410502)。

摘　　要：利用丙烯酰氧丙基多面体低聚倍半硅氧烷(Acrylo-POSS)和3-巯基-1-丙烷磺酸盐(MPS)之间的巯基点击反应,一步合成水溶性Janus型多面体低聚倍半硅氧烷(AS-POSS)。通过改变投料比可以调控AS-POSS的水溶性和双键与磺酸钠基团的物质的量比。将AS-POSS与丙烯酸(AA)和丙烯酰胺(AM)共聚制备了一系列不同AS-POSS含量的AS-POSS/PAA/PAM水凝胶,其中AS-POSS质量占单体总质量1%的AS-POSS/PAA/PAM水凝胶的平衡溶胀比为512.0,断裂伸长率为1074%,压缩强度为583 kPa,屈服应变为330%,均大于对照组以N,N′-亚甲基双丙烯酰胺(MBA)为交联剂的PAA/PAM水凝胶。结果表明,AS-POSS的引入显著提高了水凝胶的溶胀度,明显增强了水凝胶的韧性、抗压缩性能和动态力学性能。AS-POSS/PAA/PAM水凝胶具有良好的导电性,离子电导率最高可达0.401 S/m。Hydrophilic Janus-type polyhedral oligomeric silsesquioxane(AS-POSS)was synthesized via one step thiol-ene click reaction of acryloxy propyl polyhedral oligomeric silsesquioxane(Acrylo-POSS)and 3-mercapto-1-propane sulfonate(MPS),of which the water solubility and the molar ratio of double bond to sodium sulfonate group was controlled by changing the feed ratio.Next,a series of AS-POSS/PAA/PAM hydrogels with different AS-POSS contents were prepared through copolymerization of AS-POSS with acrylic acid(AA)and acrylamide(AM).It was found that AS-POSS/PAA/PAM hydrogel with 1% AS-POSS to the total monomer mass showed an equilibrium swelling ratio of 512.0,elongation at break of 1074%,compressive strength of 583 kPa and yield strain of 330%,which were all higher than those of the control MBA/PAA/PAM hydrogel.The results demonstrated that the introduction of AS-POSS to the hydrogel significantly improved its performance in swelling,toughness,compression resistance and dynamic mechanics.Moreover,AS-POSS/PAA/PAM hydrogel displayed excellent electrical conductivity with the highest up to 0.401 S/m.

关 键 词：多面体低聚倍半硅氧烷 巯基点击化学 水溶性单体 Janus型 丙烯酸 丙烯酰胺 功能材料 

分 类 号：TQ427.26[化学工程] TQ264.17