Activated wood surface and functionalized cellulose co-building strong chemical wood bonding performance

Tongda Liu; Guanben Du; Yingchen Wu; Chang Liu; Hongxing Yang; Kelu Ni; Chunyan Yin; Xin Ran; Wei Gao; Long Yang

doi:10.1016/j.carbpol.2023.120573

Activated wood surface and functionalized cellulose co-building strong chemical wood bonding performance

Carbohydr Polym. 2023 Apr 1:305:120573. doi: 10.1016/j.carbpol.2023.120573. Epub 2023 Jan 13.

Authors

Tongda Liu¹, Guanben Du², Yingchen Wu³, Chang Liu⁴, Hongxing Yang³, Kelu Ni³, Chunyan Yin³, Xin Ran⁵, Wei Gao³, Long Yang⁶

Affiliations

¹ Yunnan Province Key Lab of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; International Joint Research Center for Biomass Materials, Southwest Forestry University, Kunming 650224, China; Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, China.
² Yunnan Province Key Lab of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; International Joint Research Center for Biomass Materials, Southwest Forestry University, Kunming 650224, China; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224, China. Electronic address: guanben@swfu.edu.cn.
³ Yunnan Province Key Lab of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; International Joint Research Center for Biomass Materials, Southwest Forestry University, Kunming 650224, China.
⁴ Yunnan Province Key Lab of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; College of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China.
⁵ Yunnan Province Key Lab of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, China. Electronic address: ranxin3169@sina.com.
⁶ Yunnan Province Key Lab of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China; International Joint Research Center for Biomass Materials, Southwest Forestry University, Kunming 650224, China; Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains, Ministry of Education, Southwest Forestry University, Kunming 650224, China. Electronic address: long133109070@126.com.

PMID: 36737209
DOI: 10.1016/j.carbpol.2023.120573

Abstract

Herein, an activated wood surface rich in CHO groups was constructed by spraying a sodium periodate aqueous solution on a natural wood surface. Besides, microcrystalline cellulose was functionalized to obtain aminated cellulose, which was dissolved in an aqueous solution and used as a specific adhesive. Subsequently, an ultrastrong wood bonding interface was co-constructed with the activated wood surface and aminated cellulose, which was formed by a chemical covalent reaction between aldehyde groups at the activated wood interface and amino groups on aminated cellulose. The dry, hot-water, and boiling-water lap shear strengths of the plywood specimens were 1.47, 1.07, and 1.08 MPa, respectively. The boiling-water strength of the plywood made from the activated wood surface achieved increased to 1.08 MPa from 0 MPa of the plywood constructed on the nonactivated wood surface. The chemical crosslinking reaction and bonding mechanism between the adhesive and activated wood surface were clarified by density functional theory calculations, attenuated total reflectance-Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The results showed that chemical bonding (aminal NCN and imine CN) at the bonding interface played an important part in improving the water resistance and bonding strength. This work provides new concepts for designing durable and moisture-resistant wood products.

Keywords: Activated wood surface; Chemical bonding interface; Functionalized cellulose; Sustainable.