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Abstract：
Petroleum-based plastics, such as PP, PE, PVC, etc., have become an important source of environmental pollution due to their hard degradation, posing a serious threat to the human health. Isolating nanocellulose from abundant biomass waste resources and further integrating the nanocellulose into hydrophobic transparent film (i.e., nanopaper), to replace the traditional nondegradable plastic film, is of great significance for solving the problem of environmental pollution and achieving sustainable development of society. This study respectively extracted nanocellulose from the branches of Amorpha fruticosa Linn., wheat straw, and poplar residues via combined mechanical treatments of grinding and high-pressure homogenization. Among them, the nanocellulose derived from the Amorpha fruticosa has a finer structure, with diameter of about 10 nm and an aspect ratio of more than 500. With the nanocellulose as building block, we constructed hydrophilic nanopaper with high light transmittance (up to 90%) and high mechanical strength (tensile strength up to 110 MPa). After further hybridization by incorporating nano-silica into the nanopaper, followed by hydrophobic treatment, we built hydrophobic nanopaper with transmittance over 82% and a water contact angle of about 102° that could potentially replace transparent plastic film and has wide applications in food packaging, agricultural film, electronic device, and other fields.
摘要：
石油基塑料,如PP，PE,PVC,等。,由于它们的严重降解，已经成为环境污染的重要来源，严重威胁人类的健康。从丰富的生物质废物资源中分离出纳米纤维素，并将纳米纤维素进一步整合到疏水性透明膜中（即，纳米纸)，取代传统的不可降解的塑料薄膜，对于解决环境污染问题,实现社会可持续发展具有重要意义。本研究分别从紫桃枝条中提取纳米纤维素。,小麦秸秆,和杨树残渣通过研磨和高压均质的联合机械处理。其中,来自紫穗槐的纳米纤维素具有更精细的结构，直径约为10nm，纵横比大于500。以纳米纤维素为基础，我们构建了具有高透光率（高达90％）和高机械强度（拉伸强度高达110MPa）的亲水性纳米纸。通过将纳米二氧化硅掺入纳米纸进一步杂交后，然后进行疏水处理，我们构建了透光率超过82%的疏水纳米纸，水接触角约为102°，有可能取代透明塑料薄膜，在食品包装中具有广泛的应用，农业电影,电子设备,和其他领域。
