Insight into the mechanism underlying modification of <i>Neosinocalamus affinis</i> by hygrothermal treatment-Reference-Cited by-同舟云学术

Insight into the mechanism underlying modification of Neosinocalamus affinis by hygrothermal treatment

Published:2023-01-30 Issue:3 Volume:77 Page:184-197
ISSN:0018-3830
Container-title:Holzforschung
language:en
Short-container-title:

Author:

Feng Qiming¹²,Huang Yanhui¹³,Zhao Rongjun¹,Fei Benhua⁴

Affiliation:

1. Key Laboratory of Wood Material Science and Application, Ministry of Education, Beijing Forestry University , Beijing , 100083 , China

2. Research Institute of Wood Industry, Chinese Academy of Forestry , Beijing , 100091 , China

3. Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University , Beijing , 100083 , China

4. Department of Biomaterials , International Center for Bamboo and Rattan , Beijing 100102 , China

Abstract

Abstract Hygrothermal treatment is an effective method for improving the dimensional stability of bamboo. In this study, changes in the physicochemical properties of Neosinocalamus affinis after hygrothermal treatment were comprehensively investigated: the hemicellulose content decreased, C=O in the acetyl group and the hydroxyl content decreased and xylan was partially degraded. The dimensional stability of N. affinis gradually increased with temperature, and optimal values were obtained at 220 °C, as indicated by a 16.5% decrease in anti-swelling efficiency and a 93.7% increase in contact angle. Alterations in the macromolecular structure of lignin were also observed: the contents of β-O-4 linkages and p-coumarate decreased by 54.3% and 23.9%, respectively; β-5 linkages disappeared at 220 °C, as determined by heteronuclear single quantum correlation spectroscopy. However, the maximum values for crystallinity, nano indentation elastic modulus, and hardness were reached at 180 °C and were higher than those of the untreated samples by 8.6%, 19.9%, and 23.5%, respectively. With the combined application of physical mechanics and dimensional stability, hygrothermal treatment at 180 °C and 100% relative humidity was proved to exert the optimal effects on N. affinis. These results provide new and comprehensive insights into the mechanism allowing the modification of N. affinis by hygrothermal treatment.

Publisher

Walter de Gruyter GmbH

Subject

Biomaterials

Link

https://www.degruyter.com/document/doi/10.1515/hf-2022-0138/pdf

Reference71 articles.

1. Asif, M. (2009). Sustainability of timber, wood and bamboo in construction. Sustainability Constr. Mater. 6: 31–54.

2. Barrett, E.P., Joyner, L.G., and Halenda, P.P. (1951). The determination of pore volume and area distributions in porous substances. I. Computations from nitrogen isotherms. J. Am. Chem. Soc. 73: 373–380, https://doi.org/10.1021/ja01145a126.

3. Batista, D.C., de Muniz, G.I.B., da Silva Oliveira, J.T., Pqes, J.B., and Nisgoski, S. (2016). Effect of the Brazilian thermal modification process on the chemical composition of Eucalyptus Grandis Juvenile Wood-Part 1: cell wall polymers and extractives contents. Maderas Cienc. Technol. 18: 273–284, https://doi.org/10.4067/s0718-221x2016005000025.

4. Brosse, N., El Hage, R., Chaouch, M., Pétrissans, M., Dumarçay, S., and Gérardin, P. (2010). Investigation of the chemical modifications of beech wood lignin during heat treatment. Polym. Degrad. Stabil. 95: 1721–1726, https://doi.org/10.1016/j.polymdegradstab.2010.05.018.

5. Cao, Y.J., Jiang, J.H., Lu, J.X., Huang, R.F., Jiang, J.L., and Wu, Y.M. (2012). Color change of chinese fir through steam-heat treatment. Bioresources 7: 2809–2819.