CAJ | 학술논문

利用植酸对短玻璃纤维粉进行预处理,然后以钛酸丁酯为原料,乙醇介质中通过胶溶-水解法在玻璃纤维表面制备了纳米 TiO2。SEM观察表明直接在玻璃纤维表面进行制备难以形成有效包覆,而植酸处理有利于TiO2均匀包覆,纤维表面 TiO2颗粒尺寸约50 nm,呈多孔结构。XPS 结果显示纳米 TiO2/玻璃纤维复合粉体表面Ti元素处于 TiO2中 Ti4+结合态,同时存在 Ti-O-Si 键。分析粉体的 XRD 结果认为纳米 TiO2主要以锐钛矿形式存在,热分析结果表明复合粉体在受热过程中失重约6.3%,相应DTA曲线中未出现明显吸热峰。对比了原始玻璃纤维粉和纳米TiO2/玻璃纤维复合粉体在环氧树脂中分散状态及相应复合材料涂层的耐磨失重,SEM观察表明未处理玻璃纤维难以与树脂形成有效的界面粘结,而经过改性后,复合颗粒与基体结合紧密,纳米 TiO2表面的羟基参与环氧树脂的固化过程,显著改善了两相之间的界面作用,改性后填充体系的耐磨失重降低63.6%。
이용식산대단파리섬유분진행예처리,연후이태산정지위원료,을순개질중통과효용-수해법재파리섬유표면제비료납미 TiO2。SEM관찰표명직접재파리섬유표면진행제비난이형성유효포복,이식산처리유리우TiO2균균포복,섬유표면 TiO2과립척촌약50 nm,정다공결구。XPS 결과현시납미 TiO2/파리섬유복합분체표면Ti원소처우 TiO2중 Ti4+결합태,동시존재 Ti-O-Si 건。분석분체적 XRD 결과인위납미 TiO2주요이예태광형식존재,열분석결과표명복합분체재수열과정중실중약6.3%,상응DTA곡선중미출현명현흡열봉。대비료원시파리섬유분화납미TiO2/파리섬유복합분체재배양수지중분산상태급상응복합재료도층적내마실중,SEM관찰표명미처리파리섬유난이여수지형성유효적계면점결,이경과개성후,복합과립여기체결합긴밀,납미 TiO2표면적간기삼여배양수지적고화과정,현저개선료량상지간적계면작용,개성후전충체계적내마실중강저63.6%。
Short glass fiber powders were firstly treated by phytic acid,and then coated by nano TiO2 in alcohol solution of Ti(OBu)4 through peptization-hydrolyzation method.SEM observation showed that it was difficult to directly coat glass fiber with TiO2 particles without phytic acid treatment,but after treated by phytic acid nano TiO2 particles approximate 50 nm in size were uniformly coated the surface of glass fiber forming porous film.The results of XPS showed that Ti elements on the surface of the composites were in the state of Ti4+ of TiO2 ,and there also existed Ti-O-Si bonds.XRD analysis revealed that nano TiO2 mainly existed as anatase form.Thermal analysis showed that the weight loss of the composite powders was about 6.3% during the heat-ing process,and no obvious endothermic peak appeared in the DTA curve.The dispersion state and the abrasive loss of the epoxy resin filled with original glass fibers and the composite powders were compared.SEM observa-tion showed that the untreated glass fiber failed to form an effective bonding interface with epoxy resin.Howev-er,nano-TiO2/glass fiber composite powders were closely bonded with the resin due to the reaction of Ti-OH and epoxy resin during the curing process.The abrasive loss of composite coatings filled with nano-TiO2/glass fibers was decreased by 63.6%.