摘要
目的研究玄武岩纤维/树脂基体界面对涂层性能的影响,通过界面结构的调控提升复合涂层的综合性能。方法采用酸刻蚀、活化和化学接枝等改性方法处理短切玄武岩纤维,制备短切玄武岩纤维增强环氧复合涂层。通过扫描电子显微镜、硬度测试、摩擦磨损测试、热重分析、电化学测试等方法研究短切玄武岩纤维不同表面改性方法(酸刻蚀、酸刻蚀+化学接枝、活化处理、活化+化学接枝)和添加量对涂层硬度、摩擦磨损性能及腐蚀防护性能的影响。结果4种表面改性方法均对短切玄武岩纤维的表面活性有提升效果,改善了短切玄武岩纤维与环氧树脂的相容性。其中,活化+化学接枝协同改性的效果最为显著,经过该方法改性后,复合涂层的硬度、耐磨性、耐热性显著提高。与环氧涂层相比,复合涂层的摩擦因数降低了0.113,硬度提高了32.59%,相同温度(320℃)下的重量损失降低了5%。同时,复合涂层的耐蚀性也显著增强,浸泡133 d后的涂层阻抗值仍保持1×10^(8)Ω·cm^(2)以上。结论表面改性使短切玄武岩纤维与环氧树脂之间相容性增强,进而形成了强有力的相互作用与结合,使得环氧涂层的硬度、耐磨性能、耐热性能和腐蚀防护性能显著提升。
Due to the volatilization of solvent and erosion of waterborne corrosive medium,the diffusion gap of pure epoxy coating inevitably appears,reducing the barrier performance.The addition of inorganic pigment can block the diffusion gap,effectively improve the barrier performance and even the mechanical properties of the composite coating.However,the inorganic pigments without treatment have poor compatibility with resins and obvious tendency to agglomerate.In the composite coating,the resin matrix/pigment interface is an important microstructure which has a crucial influence on the physical,chemical and mechanical properties of the composite coating.The work aims to investigate the effect of the chopped basalt fiber/resin matrix interface on properties of the composite coating,and improve the comprehensive properties of the composite coating through regulating the interface structure by acid etching,activation treatment,chemical grafting and other modification methods.Four surface modification methods were used to modify the chopped basalt fiber surface such as acid etching,acid etching + chemical grafting,activation treatment,activation + chemical grafting.The tensile experiment,friction experiment and electrochemical experiment were conducted to study the hardness,friction and wear properties and corrosion protection properties of epoxy composite coatings.The results showed that the four surface modification methods improved the surface activity of chopped basalt fibers.The data of scanning electron microscopy showed that the change of morphology and increase of roughness were beneficial to the adhesion of fiber/coating interfaces.The data of Fourier transform infrared spectroscopy confirmed the increase of active functional groups —OH and Si—O—Si on the surface of modified chopped basalt fibers.The increase of active functional groups resulted in the improvement of the compatibility and interfacial bonding strength of chopped basalt fiber and epoxy resin.Among the modification methods to the chopped basalt
作者
张寒露
曹京宜
胡建海
郑宏鹏
王莹莹
林冰
张海龙
曾树义
唐鋆磊
ZHANG Han-lu;CAO Jing-yi;HU Jian-hai;ZHENG Hong-peng;WANG Ying-ying;LIN Bing;ZHANG Hai-long;ZENG Shu-yi;TANG Jun-lei(Unit 92228,PLA,Beijing 100072,China;School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China;Sichuan Aerospace Tuoda Basalt Fiber Development Co.,Ltd.,Sichuan Dazhou 635000,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2023年第5期149-162,共14页
Surface Technology
基金
国家自然科学基金(52101076)
2021辽宁省博士科研启动基金计划项目(2021-BS-058)
四川省重大科技专项项目(2021ZDZX0002)
四川省科技计划项目(2021YFSY0055)。
关键词
短切玄武岩纤维
表面改性
复合涂层
界面结合
电化学交流阻抗
chopped basalt fiber
surface modification
composite coating
interfacial bonding
electrochemical impedance spectrum
