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.
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)
