Nano-SiO2改性氧化淀粉PVA复合电纺纤维和薄膜的制备及表征的开题报告

精品文档---下载后可任意编辑Nano-SiO2 改性氧化淀粉 PVA 复合电纺纤维和薄膜的制备及表征的开题报告摘要：随着人们对绿色环保材料的需求和对功能化材料的需求不断提高，传统材料逐渐不能满足市场需求。因此，氧化淀粉作为可再生、生物降解的材料，其性质稳定且易于处理，成为了一种备受关注的材料。但是，氧化淀粉在某些性能上表现还不够理想，如力学性能和抗水性能较差等。因此，本讨论将采纳添加纳米二氧化硅的方法来改性氧化淀粉，提高其性能，同时采纳电纺技术制备复合纳米纤维和薄膜。本讨论将首先通过文献综述和实验设计确定制备氧化淀粉/ PVA 复合气凝胶的最优工艺参数，然后添加不同比例的纳米二氧化硅，并通过扫描电子显微镜、X 射线衍射仪、透射电子显微镜等手段对材料进行表征。接下来，通过电纺技术制备材料纳米纤维和薄膜，并对其进行物理、力学和热性能的测试。最后通过比较不同样品的性能，确定纳米二氧化硅在氧化淀粉/PVA 复合材料中的最佳添加质量分数。关键字：氧化淀粉；纳米二氧化硅；复合纤维；薄膜；电纺技术。Abstract：With the increasing demand for green and environmentally friendly materials and functional materials, traditional materials gradually cannot meet market demand. Therefore,oxidized starch has become a widely studied material as a renewable, biodegradable material with stable properties and easy processing. However, oxidized starch still has poor mechanical properties and water resistance in some aspects, which led us to adopt the method of adding nano silica to improve its performance. At the same time, composite nano-fibers and films were prepared using electrospinning technology.In this study, we will first determine the optimal process parameters for preparing oxidized starch/PVA composite aerogels through literature review and experimental design, then add different proportions of nano silica, and characterize the material by scanning electron microscopy, X-ray diffractometer, transmission electron microscope and other methods. Then, the material nano-fibers and films were prepared by electrospinning technology and their physical, 精品文档---下载后可任意编辑mechanical and thermal properties were tested. Finally, by comparing the properties of different samples, we determined the optimal mass fraction of nano silica in oxidized starch/PVA composite materials.Keywords: oxidized starch; nano silica; composite fibers; films; electrospinning technology.