林产化学与工业2025，Vol.45Issue(2)：51-58,8.DOI:10.20195/j.issn.0253-2417.2024016
油茶皂素基导电水凝胶的制备及其传感性能研究
Preparation and Sensing Performance of Camellia Saponin-based Conductive Hydrogel
摘要
Abstract
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 Fe3+.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 Fe3+ions significantly enhanced the mechanical and conductive properties of the hydrogel.In mechanical tensile experiments,the hydrogel exhibited a elongation at break of 1 038％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.关键词
生物基材料/机械性能/传感器Key words
biobased materials/mechanical properties/sensor分类
化学工程引用本文复制引用
桑森鑫,饶红丹,胡立松,何志平,方学智,杜孟浩..油茶皂素基导电水凝胶的制备及其传感性能研究[J].林产化学与工业,2025,45(2):51-58,8.基金项目
浙江省重点研发计划资助项目(2023C02042) （2023C02042）
