文献类型：期刊文献

中文题名：油茶皂素基导电水凝胶的制备及其传感性能研究

英文题名：Preparation and Sensing Performance of Camellia Saponin-based Conductive Hydrogel

作者：桑森鑫[1,2] 饶红丹[2,3] 胡立松[2] 何志平[1] 方学智[2] 杜孟浩[2]

第一作者：桑森鑫

机构：[1]浙江农林大学食品与健康学院,浙江杭州311300;[2]中国林业科学研究院亚热带林业研究所,浙江杭州311400;[3]中南林业科技大学食品科学与工程学院,湖南长沙410004

年份：2025

卷号：45

期号：2

起止页码：51-58

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：;北大核心:【北大核心2023】；

基金：浙江省重点研发计划资助项目(2023C02042)。

语种：中文

中文关键词：生物基材料;机械性能;传感器

外文关键词：biobased materials;mechanical properties;sensor

分类号：TQ35

摘要：采用绿色、天然、可降解和经济的油茶皂素(S)为原料,制备了具有良好机械性能的导电水凝胶。先将油茶皂素加入水/甘油(G)的混合溶液中搅拌,然后加入聚乙烯醇(PVA)在105℃下搅拌3 h,在-20℃和25℃下冻融-解冻,制得PGS水凝胶;最后加入氯化铁溶液进行金属螯合反应,构建聚乙烯醇-甘油-油茶皂素-铁离子(PGSF)水凝胶,为了方便比较,同时制备了PVA水凝胶(P)、PVA/甘油水凝胶(PG)和PVA/油茶皂素水凝胶(PS),并对水凝胶的力学性能、导电性能和传感性能进行了研究。研究结果表明:油茶皂素和Fe^(3+)螯合,能够显著提高水凝胶的机械性能和导电性能。在力学拉伸实验中,PGSF水凝胶的断裂伸长率和抗拉强度分别达到了1 038%和1.28 MPa;在150%应变的循环拉伸和50%应变的循环压缩力学试验中,水凝胶显示出较小的滞后曲线,表明其具有较好的稳定性;在导电和传感实验中,PGSF水凝胶的电导率为1.99 S/m,传感灵敏度为2.48。最后,将该水凝胶组装成柔性传感器用于监测人体关节运动,包括手指、手腕、胳膊和膝盖的弯曲,结果显示出稳定和规律性的电阻变化率曲线。
Utilized eco-friendly,natural,biodegradable,and economical camellia saponin(S)as raw materials,a conductive hydrogel with excellent mechanical property was prepared.The process involved first dissolving camellia saponin in a water/glycerol(G)mixture,followed by the addition of polyvinyl alcohol(PVA)and stirring at 105℃for 3 h.The solution was then subjected to freeze-thaw cycling at-20℃and 25℃to obtain polyvinyl alcohol glycerol camellia saponin(PGS)hydrogel.Subsequently,an iron chloride solution was added to undergo a metal chelation reaction,resulting in the formation of polyvinyl alcohol glycerol camellia saponin ferric ion(PGSF)hydrogel consisting of polyvinyl alcohol,glycerol,camellia saponin and Fe 3+.For comparison,PVA hydrogel(P),PVA/glycerol hydrogel(PG)and PVA/camellia saponin hydrogel(PS)were prepared simultaneously and the mechanical,conductive and sensing properties of the hydrogels were studied.The results showed that the chelation of camellia saponin with Fe 3+ions significantly enhanced the mechanical and conductive properties of the hydrogel.In mechanical tensile experiments,the hydrogel exhibited a elongation at break of 1038%and a tensile strength of 1.28 MPa.In the cyclic tensile test of 150%strain and cyclic compressive mechanics test of 50%strain,the hydrogel showed a small hysteresis curve,indicating that it had good stability.In conductivity and sensing experiments,the hydrogel's conductivity was 1.99 S/m,with a sensitivity coefficient of 2.48.In the end,the hydrogel was assembled into a flexible sensor for monitoring human joint movements,including the flexion of fingers,wrists,arms,and knees,and the results showed a stable and regular relative resistance change curve.