摘要
用沉淀法制备了苯胺-草酸氧钛锶(SrTi(C2O4)2)颗粒。FTIR分析表明,苯胺已引入到SrTi(C2O4)2颗粒的表面;XRD分析表明,苯胺-SrTi(C2O4)2颗粒为含少量结晶的无定形态。采用SEM观察颗粒的形貌,结果表明,随反应体系中苯胺与钛原子物质的量比naniline/nTi的增大,苯胺-SrTi(C2O4)2颗粒由近似球状(naniline/nTi=0)变为多面体状(naniline/nTi=2),而后变为棒状与团簇状颗粒的混合体系(naniline/nTi=3)。以苯胺-SrTi(C2O4)2颗粒为分散相制备颗粒质量分数为66.7%电流变液,电流变性能测试结果表明,在naniline/nTi=2时,电流变液具有较高的剪切应力和剪切屈服强度、较大的漏电流密度。苯胺在颗粒制备过程中起控制颗粒形貌的作用,在电流变液体系中起极性分子的作用,其对苯胺-SrTi(C2O4)2电流变液性能的影响是两种效应综合作用的结果。
The aniline strontium titanyl oxalate （aniline- SrTi（C2 O4 ）2 ） particles were prepared hy a precipitation method. FTIR patterns show that aniline has been added to the surface of the SrTi（C2 O4）2 particles. XRD patterns indicate that the particles are amorphous structure with a little of crystallization. The morphology of the particles was observed by SEM, the results of which indicate that with the increase of the molar ratio of aniline toTi atoms, the smorphology of aniline - SrTi （C2 O4 ） 2 particles change from approximate globular to a polyhedron shape , and then a mixure consists of rod and cluster shaped particles . The electrorheologieal （ER） fluids were prepared with 66. 7% mass fraction of aniline- SrTi（C2O4 ）2 particles with different aniline contentand tested. The experimental results indicate that the ER fluid prepared by the particles with a molar ratio of n aniline/n Ti2 present the largest field-induced shear stress, yield stress and leak current density. The aniline controls the particle morphology during the preparation of the particles, and acts as polar molecules in the ER fluids system. The influence of the aniline on properties of the ER fluids is a combined effect of the two roles.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2014年第1期81-87,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(51108062)
中央高校基本科研业务费专项资金(DUT13ZD(G)02)
