Dialdehyde modified cellulose nanofibers enhanced the physical properties of decorative paper impregnated by aldehyde-free adhesive

Jianfeng Xu; Xiaoyan Li; Ru Liu; Zhen Shang; Ling Long; Hongyun Qiu; Yonghao Ni

doi:10.1016/j.carbpol.2020.116941

Dialdehyde modified cellulose nanofibers enhanced the physical properties of decorative paper impregnated by aldehyde-free adhesive

Carbohydr Polym. 2020 Dec 15:250:116941. doi: 10.1016/j.carbpol.2020.116941. Epub 2020 Aug 16.

Authors

Jianfeng Xu¹, Xiaoyan Li¹, Ru Liu², Zhen Shang³, Ling Long¹, Hongyun Qiu¹, Yonghao Ni⁴

Affiliations

¹ Research Institute of Wood Industry, Chinese Academy of Forestry, Haidian, Beijing, 100091, PR China.
² Research Institute of Wood Industry, Chinese Academy of Forestry, Haidian, Beijing, 100091, PR China. Electronic address: liuru@criwi.org.cn.
³ Department of Chemical Engineering, University of New Brunswick, Fredericton, NBE3B5A3, Canada.
⁴ Department of Chemical Engineering, University of New Brunswick, Fredericton, NBE3B5A3, Canada. Electronic address: yonghao@unb.ca.

PMID: 33049853
DOI: 10.1016/j.carbpol.2020.116941

Abstract

Impregnated decorative paper was an important wood-based panel finishing material. However, traditional impregnated decorative paper was impregnated with melamine-formaldehyde resin, which will release formaldehyde and harm the human health. To solve this problem, small molecule polyacrylate-polyethylene glycol (PEG) adhesive was used to achieve the non-formaldehyde addition of the impregnation system. The dialdehyde modified CNF (D-CNF), modified by sodium periodate (NaIO₄), and triethylenediamine were introduced to enhance the surface properties of the impregnated decorative paper. The results showed that the incorporation of D-CNF and triethylenediamine imparted excellent physical strength and surface properties to impregnated decorative paper. When the dosage of 0.3 wt% D-CNF and 3 mL/100 g triethylenediamine in the compound emulsion, the hardness, abrasion resistant value and surface bonding strength of impregnated decorative paper adhered fiberboard reached 3H, 330 r of damage and 1.13 MPa, respectively. Thus, it could be effectively used for making high-performance formaldehyde-free impregnated decorative paper.

Keywords: Aldehyde-free adhesive; Cellulose Nanofibers (CNF); Dialdehyde modification; Impregnated decorative paper; Schiff base reaction.