首页|高强度双网络结构木基复合凝胶的制备及性能

高强度双网络结构木基复合凝胶的制备及性能

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
以木材为原料,通过脱基质处理获得木材纤维骨架,在其多孔结构中利用原位聚合法构建以聚乙烯醇(PVA)/聚丙烯酰胺(PAM)为双网络结构填充相的高强度木基复合凝胶.通过调控PVA及PAM在复合凝胶体系中的质量比,系统研究制备所得木基复合凝胶的宏/微观形貌、力学性能、光学性能及表面化学性能等变化规律.结果表明:在聚丙烯酰胺/木材纤维骨架中引入少量PVA,通过构建双网络结构,能够有效提升木基复合凝胶的力学性能,其最大拉伸强度可达16.47 MPa,断裂伸长率约为11.61%.将木基复合凝胶作为柔性基材组装构建传感器件,电导率为1.8 S/m,发现木基传感器在多种形变下均表现出稳定可重复的相对电流信号变化.
Preparation and performance of high-strength wood-based composite hydrogels with double network structures
The wood was used as raw material to obtain the wood skeleton by matrix-removal.And the high-strength wood-based composite hydrogels with PVA/PAM double network structure were constructed by in-situ polymerization.The change rules of macro/micro functional morphological characteristics,mechanical properties,optical properties and chemical composition of the wood-based composite hydrogels were systematically investigated by adjusting the mass ratio of PVA and PAM in the hydrogel system.The results show that introducing a small amount of PVA into the PAM/wood skeleton composite hydrogels and constructing a double network structure can effectively enhanced the mechanical properties of the wood-based composite hydrogels.As a result,the wood-based composite hydrogels show tensile properties with a maximum tensile strength and fracture elongation of 16.47 MPa and 11.61%.Furthermore,the wood-based composite hydrogel is used as a flexible substrate with a conductivity of 1.8 S/m to assemble and build sensor components.The results indicate that the flexible sensor exhibits stable and repeatable relative current signal changes under a variety of deformations.

woodpolyvinyl alcoholpolyacrylamidehydrogelmechanical propertyflexible wearable sen-sor

王露臻、钟丽、游沐秋、徐朝阳、金永灿、李大纲、陈楚楚

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南京林业大学 材料科学与工程学院,南京 210037

南京林业大学 轻工与食品学院,南京 210037

木材 聚乙烯醇 聚丙烯酰胺 凝胶 力学性能 柔性传感器

国家自然科学基金第 14批中国博士后科学基金中国博士后科学基金江苏省博士后科研资助计划项目2023江苏省研究生科研与实践创新计划项目

319012542021T1403292020M6715062020Z027KYCX23_1135

2024

10.11868/j.issn.1001-4381.2022.000986

材料工程
中国航发北京航空材料研究院

材料工程

CSTPCD北大核心
影响因子：0.78
ISSN：1001-4381
年,卷(期)：2024.52(4)
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