Preparation and properties of cellulose‐based nano composites of clay and polypropylene
Preparation and properties of cellulose‐based nano composites of clay and polypropylene
复制标题
纤维素基粘土与聚丙烯纳米复合材料的制备及性能
DOI：
10.1002/app.34546
复制
发表时间：
2012
影响因子：
3
通讯作者：
Sun
中科院分区：
文献类型：
--
作者：
J. Pandey;Sena Lee;Hyun;H. Takagi;Chan;Sun
采用反应挤出接枝马来酸酐的方法对聚丙烯（PP）基体进行改性，制备了PP/结晶纤维素复合材料。对木粉进行酸、碱和机械处理，以获得微米和纳米晶纤维素悬浮液。层状硅酸盐（粘土）部分插层与纤维素晶体，和改性的层状硅酸盐被用作填料在PP基体中的各种浓度通过熔融共混过程。由纤维素改性粘土制备的复合材料的拉伸强度大于PP-粘土和PP-WF复合材料在5%的填料浓度，而观察到的机械性能恶化时，粘土和WF单独用于增强。如X射线衍射（XRD）数据和透射电子显微镜（TEM）图像所示，在较高浓度下用纤维素对粘土改性后，填料在基质中的分散性显著降低。热重分析（TGA）表明，样品的热阻增加，这是由于存在的粘土血小板，通过产生酷刑路径散热。© 2012 Wiley Periodicals，Inc.应用聚合物科学杂志，2012年
Composites of polypropylene (PP) and crystalline cellulose were prepared after modification of the host matrix by reactive extrusion grafting of maleic anhydride. Acid, alkali, and mechanical treatment of wood flour (WF) was conducted to obtain a suspension of micro- and nanocrystalline cellulose. Layered silicates (clay) were partially intercalated with cellulose crystals, and the modified layered silicate was used as filler in the PP matrix at various concentrations via a melt-blending process. The tensile strength of composites prepared from cellulose-modified clay was greater than that of the PP-clay and PP-WF composites at a 5% filler concentration, whereas deterioration of mechanical properties was observed when clay and WF were used alone for reinforcement. The dispersion of the filler in the matrix significantly decreased after clay modification with cellulose at higher concentrations, as shown by X-ray diffraction (XRD) data and transmission electron microscopy (TEM) images. Thermogravimetric analysis (TGA) showed an increase in the thermal resistance of samples, which was attributed to the presence of clay platelets that dissipated heat by generating torture paths. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012