期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 200, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2020.108411
关键词
Wood-plastic composite; Waste printed circuit board; Physical performance; Solid-state shear milling
资金
- National Key Research and Development Project of China [2019YFC1908203, 2019YFC1908205]
- Funds for International Cooperation and Exchange of the National Natural Science Foundation of China [51861165203]
- National Natural Science Foundation of China [51873131]
As a byproduct of electronic waste, the accumulated millions of tons of nonmetals from waste printed circuit boards (referred to hereinafter as NPCB) have caused severe environmental issues. Here, we report a novel method for the production of wood composites reinforced by NPCB via a solid-state shear milling ((SM)-M-3) process. The (SM)-M-3 pretreatment successfully exfoliated NPCB into single glass fibers with a high aspect ratio. Hemicellulose and lignin were liberated from the surface of the wood cellulose fibers, and the size was reduced to a submicron level. Both optical and electron microscopy revealed that the wood composites prepared by the (SM)-M-3 process exhibited excellent filler dispersion and excellent interfacial adhesion between the filler and the polymer. This NPCB-reinforced wood composite was thermally stable at temperatures below 200 degrees C. In addition, the exfoliated NPCB and wood flour provided a well-designed structure that improved the tensile strength of the composite to 32.4 MPa. This wood composite retained a high storage modulus of 616 MPa at 100 degrees C, expanding the upper service temperature limit for wood composites. The excellent interfacial adhesion and hydrophilic nature of NPCB led to water absorption as low as 0.21%, exceeding the values previously reported for NPCB-reinforced wood composites under the same conditions. Finally, this wood composite also contained negligible organic pollutants and low heavy-metal concentrations, which are far below the regulatory limits for hazardous waste. The above results show that the reuse of NPCB in high-strength wood composites is a promising choice for both resolving environmental pollution and reusing solid waste to create value-added products.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据