Surface Properties of the Microgels Based on N-isopropylacrylamide and Tert-butyl Acrylate by Using N,N′-methylene-bis(acrylamide) and Clay as Cross-linker  

作　　者：张青松 路平 查刘生 马敬红 梁伯润 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University [2]Research Center for Analysis and Measurement, Donghua University

出　　处：《Journal of Donghua University(English Edition)》2006年第5期36-40,共5页东华大学学报（英文版）

基　　金：Supported by the Major Project of Science and Technology Research of the Educational Ministry of China (No.105077) and DoctorateInnovation Foundation of Donghua University(No.106 06 001900611)

摘　　要：Adopting N, N＇-methylene-bis （aculamide） （MBA） and inorganic clay （hectorite） as chemical and physical crosslinking agent, respectively, a series temperature sensitive microgels, based on N-isopropylacrylamide （NIPAM） as a main monomer and tert-butyl acrylate （tBA） as a comonomer were synthesized by surfactant-free emulsion polymerization （SFEP）. The microgel particle size and morphology was investigated by means of Atomic Force Microscope （AFM）. The surface tension of latex particles was measured by OCA 40 Micro Video based contact angle measuring device. The results showed that the particle size of the microgels with clay as cross-linker was smaller than that using MBA as chemical cross-linker, but exterior morphology of physical microgels is not as clean and neat as chemical microgels. In general, surface tension decreases with increasing hydrophobic tBA content. These smart microgels varied with tetnperature have the potential applications in the field of drug delivery and intelligent gel fiber.Adopting N,N′-methylene-bis(acrylamide) (MBA) and inorganic clay (hectorite) as chemical and physical cross-linking agent, respectively, a series temperature sensitive microgels, based on N-isopropylacrylamide (NIPAM) as a main monomer and tert-butyl acrylate (tBA) as a comonomer were synthesized by surfactant-free emulsion polymerization(SFEP). The microgel particle size and morphology was investigated by means of Atomic Force Microscope (AFM). The surface tension of latex particles was measured by OCA 40 Micro Video based contact angle measuring device. The results showed that the particle size of the microgels with clay as cross-linker was smaller than that using MBA as chemical cross-linker, but exterior morphology of physical microgels is not as clean and neat as chemical microgels. In general, surface tension decreases with increasing hydrophobic tBA content. These smart microgels varied with temperature have the potential applications in the field of drug delivery and intelligent gel fiber.

关 键 词：N-ISOPROPYLACRYLAMIDE MICROGEL tert-butyl acrylate surface tension Atomic Force Microscope. 

分 类 号：TQ325[化学工程—合成树脂塑料工业]