烷基磷酸单酯表面改性无水硫酸钙晶须及其对PP力学性能的影响

发布时间：2018-06-07 14:36

本文选题：烷基磷酸单酯 + 无水硫酸钙晶须　；参考：《功能材料》2017年10期

【摘要】：采用烷基磷酸单酯改性剂对无水硫酸钙晶须进行了有机表面改性的研究,通过接触角(CA)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)和X射线光电子能谱(XPS)等多种测试手段对样品进行表征分析。结果表明,烷基磷酸单酯对无水硫酸钙晶须具有较好的表面改性效果,改性产品的接触角可达97°,改性后晶须表面包覆层厚度为20~50nm。由FT-IR和XPS分析结果可知,烷基磷酸单酯中的磷酸基团与晶须表面的Ca化学成键达到表面改性的目的,改性后晶须表面存在—Ca—SO_4和—Ca—O—PO_2K—O—R。最后,通过制备无水硫酸钙/PP复合材料,考察了无水硫酸钙晶须改性前后对PP力学性能的影响。结果表明无水硫酸钙晶须的加入对PP复合材料的力学性能有明显的提高,改性无水硫酸钙晶须与PP有较好的界面相容性,改性无水硫酸钙晶须对PP力学性能的提高优于未改性无水硫酸钙晶须。
[Abstract]:The organic surface modification of anhydrous calcium sulfate whisker was studied by using alkyl phosphate monoester modifier. The samples were characterized and analyzed by means of contact angle CAA, scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results show that alkyl phosphate monoester has a good surface modification effect on anhydrous calcium sulfate whisker. The contact angle of the modified product can reach 97 掳, and the coating thickness of the modified whisker is 20 ~ 50 nm. The results of FT-IR and XPS show that the phosphoric acid group in alkyl phosphate monoester can form chemical bond with Ca on the surface of whisker to achieve the purpose of surface modification. Ca-SO4 and Ca-O-PO2K-O-R exist on the surface of modified whisker. Finally, the effect of anhydrous calcium sulfate whisker modification on the mechanical properties of PP was investigated by preparing anhydrous calcium sulfate / PP composite. The results showed that the mechanical properties of PP composites were obviously improved by adding anhydrous calcium sulfate whisker, and the interfacial compatibility of modified anhydrous calcium sulfate whisker with PP was better. Modified anhydrous calcium sulfate whisker improved the mechanical properties of PP better than that of unmodified anhydrous calcium sulfate whisker.
【作者单位】：中国科学院青海盐湖研究所盐湖资源综合高效利用重点实验室;中国科学院大学;青海省盐湖资源化学重点实验室;
【基金】：国家自然科学基金资助项目(51402323) 青海省科技厅项目应用基础研究计划资助项目(2015-ZJ-737)
【分类号】：TQ132.32;TQ325.14

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