Meng Xiang¹, Zhou Yang¹, Jingjing Yang¹, Tong Lu¹, Danqi Wu¹, Zhijun Liu¹, Rongjie Xue¹, Shuang Dong^2,*

Journal of Renewable Materials, Vol.10, No.3, pp. 821-831, 2022, DOI:10.32604/jrm.2022.017347

Abstract Influenced by recent COVID-19, wearing face masks to block the spread of the epidemic has become the simplest and most effective way. However, after the people wear masks, thousands of tons of medical waste by used disposable masks will be generated every day in the world, causing great pressure on the environment. Herein, conductive polymer composites are fabricated by simple melt blending of mask fragments (mask polypropylene, short for mPP) and multi-walled carbon nanotubes (MWNTs). MWNTs were used as modifiers for composites because of their high strength and high conductivity. The crystalline structure, mechanical, electrical and thermal enhancement effect of… More >

Yuan Zhang¹, Ping Li¹, Yiqiang Wu^1,2, Guangming Yuan^1,2, Xianjun Li^1,2, Yingfeng Zuo^1,2,*

Journal of Renewable Materials, Vol.8, No.11, pp. 1473-1488, 2020, DOI:10.32604/jrm.2020.011788

Abstract The Chinese fir wood was impregnated using a cyclic increasingpressure method (CIPM) with phenolic prepolymers as the impregnating modifier. Unmodified Chinese fir and progressive increasing-pressure method (PIPM) impregnated Chinese fir were used as reference samples and were compared and analyzed. The product’s chemical structure, internal morphology, crystal structure, and heat resistance were characterized. The transversal and longitudinal sections showed better filling effects, so that it bore greater external loading and reduced the water storage space. CIPM infused more phenolic prepolymer into the Chinese fir. Not only producing more physical filling but also forming more hydrogen bond associations and chemical bond… More >