水性聚氨酯对羧基化纳米纤维素/水性环氧树脂复合材料的增韧研究  

Study on toughening of carboxylated nanocellulose/waterborne epoxy resin composites by waterborne polyurethane

作　　者：岳萌 胡立新[1] 莫涯 吴万超 赵远东 胡传群[1] Yue Meng;Hu Lixin;Mo Ya;Wu Wanchao;Zhao Yuandong;Hu Chuanqun(Hubei University of Technology,Wuhan 430068;Hubei Zhushan County Qinba Barium Salt Co.,Ltd.,Zhushan 442200)

机构地区：[1]湖北工业大学,武汉430068 [2]湖北省竹山县秦巴钡盐有限公司,竹山442200

出　　处：《化工新型材料》2025年第3期111-114,共4页New Chemical Materials

基　　金：国家自然科学基金(51143005);湖北省自然科学基金(2010CDB05805)。

摘　　要：在羧基化纳米纤维素(CNF)增韧环氧树脂(EP)研究基础上,利用物理共混法,以水性聚氨酯(WPU)为增韧剂,制备了羧基化纳米纤维素/水性聚氨酯/水性环氧树脂(CNF/WPU/WEP)复合材料,并通过力学性能测试研究了WPU对CNF/WEP复合材料的增韧效果。通过扫描电子显微镜、X射线衍射仪、热重分析仪研究了WPU对CNF/WEP复合材料的增韧机理以及热稳定性的影响。结果表明:当WPU质量分数为15%时,增韧效果最佳;CNF/WPU/WEP复合材料拉伸强度达到25.39MPa,冲击强度达到205.22kJ/m^(2),初始分解温度可达到307℃。Based on the research of carboxylated nanocellulose(CNF)-toughened epoxy resin(EP),carboxylated nanocellulose/waterborne polyurethane/waterborne epoxy resin(CNF/WPU/WEP) composites were prepared using physical blending method with waterborne polyurethane(WPU) as toughening agent.The toughening effect of WPU on CNF/WEP composites was studied through mechanical property tests.The toughening mechanism and thermal stability of CNF/WEP composite materials by WPU were studied using scanning electron microscopy,X-ray diffraction,and thermogravimetric analysis.The results showed that the toughening effect was optimal when the WPU mass fraction was 15%.The tensile strength of CNF/WPU/WEP composite reached 25.39MPa,the impact strength reached 205.22kJ/m^(2),and the initial decomposition temperature was up to 307℃.

关 键 词：水性聚氨酯 协同增韧 水性环氧树脂 羧基化纳米纤维素 

分 类 号：TB34[一般工业技术—材料科学与工程]