CAJ | 학술논문

在二元包覆SiO2，A12O3薄膜的基础上，用钛酸酯偶联剂、硅烷偶联剂及三乙醇胺、季戊四醇对亚微米TiO2颗粒表面进行有机改性.考察了改性条件对颗粒表面改性结果的影响.通过疏水性试验和润湿性试验对改性前后TiO2颗粒的表面特性进行了表征.高温裂解色谱、热重分析、X光电子能谱的测试结果表明，不同改性剂与颗粒表面存在不同程度的化学键合作用.分析了改性剂在颗粒表面的包覆状态与结构.
재이원포복SiO2，A12O3박막적기출상，용태산지우련제、규완우련제급삼을순알、계무사순대아미미TiO2과립표면진행유궤개성.고찰료개성조건대과립표면개성결과적영향.통과소수성시험화윤습성시험대개성전후TiO2과립적표면특성진행료표정.고온렬해색보、열중분석、X광전자능보적측시결과표명，불동개성제여과립표면존재불동정도적화학건합작용.분석료개성제재과립표면적포복상태여결구.
Five kinds of silane and titanate coupling,triethanolamne and pentaerythrite modification regents were used to modify the sub-micron particles of TiO2 pre-coated with SiO2 and Al2O3.The hydrophobic characteristics of samples at different modification temperatures,regent concentrations and time were investigated.A hydrophobie index and the relative contact angle in the hydrophobic and wetting experiments were employed to evaluating modification results.The titanate coupling regent(CH3)2CHOTi (OCOOR)2OP(O) (OR′)2 was found to be the best modification regent for the TiO2 particles pre-coated with SiO2 and Al2O3 from hydrophilicity to hydrophobicity.The checking results of pyrolytic gas chromatography,thermogravimetric analysis and the X-ray photoelectron spectra have shown that some modification regents were tightly coated on the particle surface.The chemical bond of Al－O－Ti is likely to form between the molecule of organic reagent (CH3)2CHOTi(OCOOR)2OP(O)(OR′)2 and the particle surface in the modification process.