基于呼吸法的硅酸盐改性杉木工艺优化与耐火性能研究

doi:10.11896/cldb.20040131

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Abstract In order to obtain a better breathing impregnation technology, the influence of technological parameters on the impregnation effect of silicate modified Chinese fir was discussed. In addition, the fire resistance of the modified Chinese fir was explored to provide technical support for expanding the application scope of Chinese fir and increasing the added value of products. The silicates impregnated modified Chinese fir was prepared by respiration method, in which the silicates were used as the impregnating modifier. The breathing impregnation process was optimized by single factor experiment and response surface method, and the fire resistance of modified Chinese fir was tested by butane gun combustion and cone calorimeter (CONE). Response surface analysis showed that the influence of each process factor on the weight percentage gain was impregnation pressure > sodium silicate concentration > impregnation time > breathing times. The optimum impregnation process was 31.60% of sodium silicate solution concentration, 3.80 h of impregnation time, 0.7 MPa of impregnation pressure and 6 times of breathing times. The combustion experiments showed that the flame of modified fir was small. The results of CONE showed that HRR, THR, SPR and TSP of the modified Chinese fir were significantly lower than those of the unmodified Chinese fir, and the residual carbon structure was relatively complete.

Key words： Chinese fir silicate bionic respiration method fire resistance

Published: 04 June 2021

CLC number:

S781.7

Fund:Hunan Provincial Technical Innovation Platform and Talent Program in Science and Technology (2019RS2040),the National Natural Science Foundation of China (31770606), Major Science and Technology Program of Hunan Province (2017NK1010), Hunan Province Innovation Foundation for Postgraduate (CX20190600) and Science and Technology Innovation Project for Postgraduates of Central South Forestry University of Science and Technology(CX20192003).

About author:: Ping Li received her Ph.D. degree in engineering from Central South University of Forestry and Technology in 2020. She is currently a lecturer in Central South University of Forestry and Technology. She researches inte-rests are wood functional improvement and application.
Yingfeng Zuo received his Ph.D. degree in engineering from Northeast Forestry University in 2014. He is currently an associate professor in Central South University of Forestry and Technology. His researchs interests are modification of biomass composites and adhesives.
Yiqiang Wu is currently a professor and doctoral supervisor in Central South University of Forestry and Technology, and he is special professor of Cheung Kong Scholars Programme. His research interests are wood and bamboo processing and utilization and biomass composite materials.

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	LI Ping
	ZUO Yingfeng
	WANG Xiangjun
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	LI Xianjun
	WU Yiqiang

Cite this article:

LI Ping,ZUO Yingfeng,WANG Xiangjun, et al. Study on Process Optimization and Fire Resistance of Silicate Modified Chinese Fir Based on Respiration Method[J]. Materials Reports, 2021, 35(10): 10197-10204.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20040131 OR http://www.mater-rep.com/EN/Y2021/V35/I10/10197

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