氨基酸功能化二硫化钼/环氧树脂复合材料耐水性能的研究  

Study on water resistance of amino acid functionalized molybdenum disulfide/epoxy resin composite materials

作　　者：曹宇鑫 吴绵园 赵明[1,3] 张斌[1,2] 孙明明[1] 张绪刚[1] 张雪[1] 李坚辉[1] Cao Yuxin;Wu Mianyuan;Zhao Ming;Zhang Bin;Sun Mingming;Zhang Xugang;Zhang Xue;Li Jianhui(Institute of Petrochemistry,Heilongjiang Academy of Sciences,Harbin 150040,Heilongjiang,China;Harbin Engineering University,Harbin 150001,Heilongjiang,China;Harbin University of Science and Technology,Harbin 150040,Heilongjiang,China)

机构地区：[1]黑龙江省科学院石油化学研究院,黑龙江哈尔滨150040 [2]哈尔滨工程大学,黑龙江哈尔滨150001 [3]哈尔滨理工大学,黑龙江哈尔滨150040

出　　处：《中国胶粘剂》2024年第8期29-34,共6页China Adhesives

摘　　要：环氧树脂因其优异物理化学性能在各种高新领域得到了重要发展。近年来随着材料科学在某些极端环境下的需求越来越多,对提高环氧树脂的耐水性需求日渐迫切。本文首先制备了氨基乙酸(Gly)改性二硫化钼(MoS_(2))纳米片,然后用其改性环氧树脂,制备了Gly-MoS_(2)/环氧树脂复合材料。对其结构、微观形貌、力学性能、热机械性能和吸水率等指标进行表征。研究结果表明:(1)成功制备了目标产物,经氨基乙酸剥离和改性的MoS_(2)纳米片在树脂基体中分散更均匀,在保证适宜的横向尺寸的同时厚度更薄,与基体树脂相容性更好。(2)随着纳米片添加量的增加,树脂体系水煮后的常温和高温剪切强度、拉伸强度和抗冲击强度均有提升。这是由于改性后纳米片在基体中分散均匀,且与环氧基形成更稳定的海岛结构,从而提升了材料本身的耐水性。(3)热机械性能测试表明,Gly-MoS_(2)纳米片对增强材料水煮后的耐温性有着重要的作用。吸水率测试表明,Gly-MoS_(2)极大地改善了环氧树脂的耐水性能,并且随着Gly-MoS_(2)纳米片的增加,吸水率随之降低。其中1.00%Gly-MoS_(2)/环氧树脂体系的耐水效果最好,水煮192 h后最终吸水率仅为1.2%。Epoxy resin has made significant progress in various high-tech fields due to its excellent physical and chemical properties.In recent years,with the increasing demand for materials science in certain extreme environments,the need to improve the water resistance of epoxy resin has become increasingly urgent.In this paper,glycine(Gly) modified molybdenum disulfide(MoS2) nanosheets were first prepared,and then they were used to modify epoxy resin,and Gly-MoS2/epoxy resin composite materials were obtained.The structure,microstructure,mechanical properties,thermomechanical properties,and water absorption rate were characterized.The research results showed that,(1) The target products were successfully prepared,and MoS2 nanosheets that had been exfoliated and modified by glycine were more evenly dispersed in the resin matrix.While ensuring appropriate lateral dimensions,the thickness was thinner and the compatibility with the matrix resin was better.(2) With the increase of the addition amount of nanosheets,the shear strength,tensile strength,and impact strength of resin systems at room temperature and high temperature after boiling were all improved.This was because the modified nanosheets were uniformly dispersed in the matrix and formed a more stable sea-island structure with the epoxy group,thereby improving the water resistance of the material itself.(3)The thermomechanical performance tests showed that Gly-MoS2 nanosheets played an important role in enhancing the temperature resistance of materials after water boiling.The water absorption test showed that Gly-MoS2 greatly improved the water resistance of epoxy resin,and the water absorption rate decreased with the increase of Gly-MoS2 nanosheets.The water resistance of the 1.00% Gly-MoS2/epoxy resin system was the best,with a final water absorption rate of only 1.2% after boiling for 192 h.

关 键 词：纳米复合材料 聚合物基复合材料 耐水性 机械性能 

分 类 号：TQ430[化学工程]