Abstract
The aim of this study was to investigate the effects of the heat treatment time and initial moisture content of bamboo on the corresponding chemical composition, crystallinity, and mechanical properties after saturated steam heat treatment at 180 °C. The mechanism of saturated steam heat treatment of bamboo was revealed on the micro-level, providing a theoretical basis for the regulation of bamboo properties and the optimization of heat treatment process parameters. XRD patterns of the treated bamboo slices were basically the same. With the increase in the initial moisture content of bamboo, the crystallinity of bamboo increased first and then decreased after treatment. Due to the saturated steam heat treatment, the content of cellulose and lignin in bamboo slices increased while the content of hemicellulose decreased, but the content of cellulose in bamboo with a 40% initial moisture content increased first and then decreased. The shear strength of treated bamboo changed little within 10 min after saturated steam heat treatment, and then decreased rapidly. During the first 20 min with saturated steam heat treatment, the compressive strength, flexural strength, and flexural modulus of elasticity of the treated bamboo increased, and then decreased.
Highlights
IntroductionWith the rapid development of China’s economy and the improvement in people’s living standards, the demand for green environmental protection materials such as bamboo and wood in home decoration, furniture, and the construction industry is increasing dramatically, which is unlike the current situation where wood resources are relatively scarce and import is becoming more and more difficult in China
With the rapid development of China’s economy and the improvement in people’s living standards, the demand for green environmental protection materials such as bamboo and wood in home decoration, furniture, and the construction industry is increasing dramatically, which is unlike the current situation where wood resources are relatively scarce and import is becoming more and more difficult in China.Bamboo resources are widely distributed in China, with the largest area, species, and output in the world [1]
The results show that the change in crystallinity of cellulose in biomass materials is directly related to its physical and mechanical properties
Summary
With the rapid development of China’s economy and the improvement in people’s living standards, the demand for green environmental protection materials such as bamboo and wood in home decoration, furniture, and the construction industry is increasing dramatically, which is unlike the current situation where wood resources are relatively scarce and import is becoming more and more difficult in China. Bamboo resources are widely distributed in China, with the largest area, species, and output in the world [1]. Bamboo has the characteristics of great environmental adaptability, fast growth, light weight, and excellent mechanical properties and so on, which is an important biomass material to replace wood. Bamboo contains a large number of polysaccharides and starch. This makes it vulnerable to a variety of molds. Achieving the real realization of “replacing wood with bamboo,” alleviating the pressure of raw material shortage in the wood processing industry, and improving the development level of the bamboo industry in China are the critical issues in the development of the bamboo industry [2,3]
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