An Optical Study of PVA-immobilized Monodispersed Polystyrene Particles
Optical sensors can directly measure changes in optical properties of hydrogels using a conventional spectrophotometer or a miniature fibre optic spectrometer.A different approach is based on the observation of special fillings or surface coatings, which are changed or moved due to hydrogel swelling.Recently, swellable polymeric hydrogel particles or membranes with different chemical functional groups were developed for sensing different kinds of stimuli1-3.A major limitation of the previous hydrogel-based optical sensors is that few hydrogel monomers are consistent with randomly distributed microspheres,in order to surmount this limitation we have developed a physically cross-linked poly(vinyl alcohol) (PVA) hydrogel around the polystyrene microspheres (PSM).As far as we know, there have been few reports about the microstructure of hydrogel-based optical sensors and the influence of refractive indices of hydrogel phase on the optical properties.In this work, the PVA-based hydrogel sensors were prepared by freeze-thaw method with DMSO/water as solvent.The microstructures of the hydrogel sensor were observed by SEM, and the stimuli-response behaviors of sensor were also studied by turbidity measurement.
Xiaotian Zhu Guangli Liu Shenghua Xu Jie Liu Keyong Tang
School of Materials Science and Engineering, Zhengzhou University, Henan Zhengzhou, 450001 Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, Beijing
国际会议
9th International Symposium on High-Tech Polymer Materials(第9届国际高技术高分子材料学术会议)(HTPM-9)
郑州
英文
140-141
2016-07-11（万方平台首次上网日期，不代表论文的发表时间）