PAPER making! FROM THE PUBLISHERS OF PAPER TECHNOLOGY INTERNATIONAL Volume 7, Number 3, 2021
the certain building materials to produce new green composite building materials. This paper studies the method of using RH processed products and the sodium silicate solution (liquid glass) made from RH ash to produce cheap wood substitute composite materials, which can be improved the insulation performance of the wall greatly. Obtained results are determined by comparing with the properties of standard polymer composite materials such as particleboards, chipboards, and medium-density fiberboards (MDF). The significance of the work is pointing out by solving the problem of recycling large-tonnage agricultural waste and reproduce products with the consumer's value. “ Preparation of an environment-friendly fiberboard with high mechanical strength using delignified wood fiber ”, Tianxiang Yuan, Wenxin Du, Kaiwen Bai, Dongxuan Huang, Tat Thang Nguyen, Jingjing Li & Xiaodi Ji, Vacuum , online (2021). This paper reports environment-friendly fiberboard with high mechanical strength using delignified wood fibers and chitosan adhesive. The influence of delignification on chemical structure and microstructure of wood fibers and mechanical strength and water resistance of fiberboards was studied. The results showed delignification effectively removed hemicellulose and a part of lignin, decomposed some large-sized lignin into small fragments distributed on wood fiber surface, and exposed cellulose bundles. The mechanical strength and water resistance of fiberboards using wood fibers delignified for 3 h reached optimal and were far higher than the requirement of the Chinese national standard. The large improvement in internal bonding strength (IB) and thickness swell (24 h TS) was mainly attributed to the delignification, while that in modulus of rupture (MOR) and modulus of elasticity (MOE) was principally due to the addition of chitosan adhesive. This study can open a new path for production of scalable environment-friendly high- performance wooden composite.
Technical Abstracts
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