壳聚糖-戊二醛水凝胶体系凝胶时间的调控及流变行为  

Time Regulation and Rheological Behavior of Chitosan Glutaraldehyde Hydrogel System

作　　者：薛小强 林彬哲 赵彻 黄文艳 杨宏军 江力 蒋其民 蒋必彪 Xiaoqiang Xue;Binzhe Lin;Che Zhao;Wenyan Huang;Hongjun Yang;Li Jiang;Qimin Jiang;Bibiao Jiang(Jiangsu Key Laboratory of Material Surface Technology,School of Materials Science and Engineering,Changzhou University,Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou 213164,China;School of Chemical Engineering and Materials,Changzhou Institute of Technology,Changzhou 213032,China;Huaide College,Changzhou University,Jingjiang 214500,China)

机构地区：[1]江苏省环境友好高分子材料重点实验室常州大学材料科学与工程学院江苏省光伏科学与工程协同创新中心,江苏常州213164 [2]常州工学院化工与材料学院碳纤维新材料产业学院,江苏常州213032 [3]常州大学怀德学院,江苏靖江214500

出　　处：《高分子材料科学与工程》2023年第6期92-98,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(52105295);国家博士后面上项目(2016M601785);江苏高校品牌专业建设工程资助项目;江苏高校优势学科建设工程资助项目;江苏省高等学校基础科学(自然科学)研究项目(21KJB460003)。

摘　　要：凝胶时间是功能性水凝胶的一个重要性能,为准确测定水凝胶的凝胶时间,将传统旋转流变仪与扩散波谱仪(DWS)共同用于凝胶化过程中结构变化的动力学分析。结果表明,旋转流变仪对于凝胶过程中的宏观力学性能可以连续测量,模量变化曲线反映了凝胶体系的瞬时变化。但旋转流变仪在测量过程中施加在样品上的外力导致凝胶化过程有一定程度的滞后,且在交联固化后外力会破坏样品导致无法继续测量后续变化。DWS通过检测样品对光的扩散作用来确定微观结构的变化,对于样品没有外加应力干扰,可以得到无扰状态下的凝胶行为动力学信息,并且可进一步追踪水凝胶交联固化后的微观结构变化。Gel time is an important property of functional hydrogels.In order to accurately determine the gel time of hydrogels,traditional rotational rheometer and diffusion spectrometer(DWS)were used to analyze the dynamics of structural changes in the process of gel.The results show that the rotational rheometer can continuously measure the macro mechanical properties in the process of gel,and the modulus change curve reflects the instantaneous change of gel system.However,the external force exerted on the sample by rotary rheometer during measurement process leads to a certain degree of lag in gel process,and the external force will destroy the sample after crosslinking and curing,resulting in the inability to continue to measure subsequent changes.DWS determines the microstructure changes by detecting the diffusion of the sample to light.Without external stress interference to the sample,it can obtain the dynamic information of gel behavior in undisturbed state,and further track the microstructure changes after the crosslinking and curing of hydrogel.

关 键 词：水凝胶 旋转流变仪 扩散波谱仪 凝胶时间 

分 类 号：TQ427.26[化学工程]