磁性二氧化硅纳米线的制备及其对环氧树脂的增韧效果  

Preparation of Magnetic Silica Nanowires and Their Toughening Effect on Epoxy Resin

作　　者：亓海霞 徐阳光 林锦昌 陈凯锋 黄从树 QI Haixia;XU Yangguang;LIN Jinchang;CHEN Kaifeng;HUANG Congshu(State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Material Research Institute,Xiamen,Fujian 361100,China;No.708 Research Institute of China Shipbuilding Industry Corporation,Shanghai,201100,China;Fuzhou University,Fuzhou 350108,China)

机构地区：[1]中国船舶集团有限公司第七二五研究所,海洋腐蚀与防护全国重点实验室,福建厦门361101 [2]中国船舶集团有限公司第七〇八研究所,上海201100 [3]福州大学,福州350108

出　　处：《涂料工业》2024年第8期9-14,共6页Paint & Coatings Industry

摘　　要：以反相微乳液法制备的二氧化硅纳米线(SiO_(2)NW)为基础,采用原位化学氧化共沉淀法在二氧化硅纳米线表面生长四氧化三铁,制备了表面负载四氧化三铁的磁性二氧化硅纳米线(SiO_(2)NW@Fe_(3)O_(4))。利用X射线衍射仪、傅立叶变换红外光谱仪、X射线光电子能谱仪、扫描电子显微镜研究了SiO_(2)NW和SiO_(2)NW@Fe_(3)O_(4)的结构和形貌。通过机械搅拌和超声分散将SiO_(2)NW@Fe_(3)O_(4)均匀分散在环氧树脂中,在微磁场环境中对环氧树脂进行固化,并对固化后涂层的力学性能进行测试。结果表明:与纯环氧树脂相比,添加磁性二氧化硅纳米线并在微磁场环境中固化后,环氧树脂的拉伸强度、冲击强度和断裂韧性分别提高了59.1%、98.5%和135.0%。磁性二氧化硅纳米线在环氧树脂中向特定方向排列,改善了环氧树脂特定方向的力学性能。In this work,magnetic silica nanowires(SiO_(2)NW@Fe_(3)O_(4))were prepared based on silica nanowires(SiO_(2)NW)obtained by inverse microemulsion method and in situ chemical oxidation co-precipitation method was used to grow triiron tetraoxide on the surface of silica nanowires.The structures and morphologies of SiO_(2)NW and SiO_(2)NW@Fe_(3)O_(4)were studied by X-ray diffraction,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscopy and transmission electron microscopy.The SiO_(2)NW@Fe_(3)O_(4)was uniformly dispersed in the epoxy resin by mechanical stirring and ultrasonic dispersion.The epoxy resin was cured in a micro magnetic field to align the magnetic nanowires in specific directions,thus improving the mechanical properties of the epoxy resin in specific directions.Compared with pure epoxy resin,after adding magnetic silica nanowires and curing in a micro magnetic field environment,the tensile strength、impact strength and fracture toughness of the epoxy resin increased by 59.1%、98.5%and 135.0%respectively.

关 键 词：磁性二氧化硅纳米线 环氧树脂 微磁场 强度 增韧 

分 类 号：TQ630.4[化学工程—精细化工]