首页|改性石墨烯纳米带/双马来酰亚胺复合材料的摩擦学性能

改性石墨烯纳米带/双马来酰亚胺复合材料的摩擦学性能

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为了改善石墨烯与双马来酰亚胺(BMI)树脂的相容性,并使其在摩擦过程中快速形成高质量自润滑转移膜,用超支化聚硅氧烷(HBPSi)和 Ni 纳米粒子共同改性石墨烯纳米带(GNRs),制备了 HBPSi/Ni/GNRs复合粒子,将其引入到BMI树脂中制备出HBPSi/Ni/GNRs/BMI复合材料.采用FTIR、SEM、TEM、摩擦磨损试验机及分子动力学模拟对复合粒子的结构、形貌及添加量和复合材料的摩擦学性能的影响进行了考察,并探究了其摩擦磨损机理.结果表明,HBPSi和Ni纳米粒子成功负载到GNRs表面上.与GNRs相比,HBPSi/Ni/GNRs复合粒子能够显著提升BMI复合材料的摩擦学性能.当HBPSi/Ni/GNRs复合粒子添加量(质量分数)为 0.6%时,HBPSi/Ni/GNRs/BMI复合材料的摩擦系数和体积磨损率均降至最低,分别为0.18和1.9×10-6 mm3/(N·m).HBPSi/Ni/GNRs复合粒子与BMI树脂强的界面作用是导致其复合材料抗剪切能力提升的关键.
Tribological properties of modified graphene anoribbon/bismaleimide composites
In order to improve the compatibility of graphene with bismaleimide(BMI)resin and enable it to rapidly form high-quality self-lubricating transfer films during friction.HBPSi/Ni/GNRs/BMI composites were synthesized by combination of BMI resin with HBPSi/Ni/GNRs composite particles,which were obtained from modification of graphene nanoribbons(GNRs)by hyperbranched polysiloxane(HBPSi)and Ni nanoparticles.The influence of structure,morphology and addition amount of the composite particles on the tribological properties of the composites were analyzed by FTIR,SEM,TEM,tribological wear testing machine and molecular dynamics simulation,with further evaluation on their friction and wear mechanism.The results showed that HBPSi and Ni nanoparticles were successfully loaded onto the surface of GNRs,while HBPSi/Ni/GNRs composite particles significantly improved the tribological properties of BMI composites compared with GNRs.When addition amount(mass fraction)was 0.6%,the friction coefficients and volume wear rate of the HBPSi/Ni/GNRs/BMI composites reached the lowest values of 0.18 and 1.9×10-6 mm3/(N·m),respectively.The strong interfacial interaction between HBPSi/Ni/GNRs composite particles and BMI resin was the key to enhance the shear resistance of its composites.

graphene nanoribbonsNi nanoparticleshyperbranched polysiloxanetribologymolecular dynamics simulationfunctional materials

沈连根、石磊、韩相鹏、史炳瑞、张佳豪、刘超

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浙江禾欣新材料有限公司,浙江 嘉兴 314000

浙江禾欣科技有限公司,浙江 嘉兴 314003

陕西科技大学 化学与化工学院,陕西 西安 710021

陕西科技大学 陕西省轻化工助剂化学与技术协同创新中心,陕西 西安 710072

陕西科技大学 西安市绿色化学品与功能材料重点实验室,陕西西安 710072

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石墨烯纳米带 Ni纳米粒子 超支化聚硅氧烷 摩擦学 分子动力学模拟 功能材料

中国博士后科学基金资助项目陕西省教育厅科研计划项目轻化工助剂化学与技术教育部重点实验室项目陕西省轻化工助剂化学与技术协同创新中心开放课题

2021M69286121JY004KFKT2022-14KFKT2022-14

2024

10.13550/j.jxhg.20230299

精细化工
大连化工研究院设计院 中国化工学会精细化工专业委员会 辽宁省化工研究院

精细化工

CSTPCD北大核心
影响因子：0.557
ISSN：1003-5214
年,卷(期)：2024.41(3)
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