Cross-linked peach gum polysaccharide adhesive by citric acid to produce a fully bio-based wood fiber composite with high strength

被引:7
|
作者
Wu, Qiao [1 ]
Jiang, Ke [1 ]
Wang, Yong [2 ]
Chen, Yuan [1 ]
Fan, Dongbin [1 ]
机构
[1] Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China
[2] Hunan Acad Forestry, Res Inst Bamboo & Wood, Changsha 410004, Peoples R China
关键词
Peach gum; Polysaccharide adhesive; Wood fiber composites; FREE REDUCING OLIGOSACCHARIDES; NEUTRAL OLIGOSACCHARIDES; STRUCTURAL ASSIGNMENTS; MECHANICAL-PROPERTIES; ENZYME HYDROLYSATE; METHYLENE-BLUE; LACTIC-ACID; FT-IR; EFFICACY; CHITOSAN;
D O I
10.1016/j.ijbiomac.2023.127514
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
As a natural polysaccharide, efficiently converting peach gum (PG) into practical materials remains a significant challenge due to its complex structure and high molecular weight. This study developed a polysaccharide adhesive using PG as the primary raw material and citric acid (CA) as a cross-linking agent to produce a fully biobased wood fiber composite. The chemical compositions of PG and the synthesis process of PG-CA/55-45 adhesive were mainly discussed. The properties of the composites were explained through a microscopic perspective. The gel permeation chromatography (GPC) analysis revealed that the mean molecular weights of PG and PG-CA/55-45 adhesive were 9.07 x 106 Da and 9.98 x 104 Da, respectively. CA was introduced to depolymerize PG and cross-linked the degraded PG to form macromolecules with higher strength by the esterification reaction. PG-CA/55-45 adhesive demonstrated good mildew resistance and thermal stability. In addition, the composites exhibited excellent mechanical properties and water resistance. This study provided a simple and feasible approach to developing a polysaccharide adhesive for producing higher strength wood fiber composites, which can propose a new strategy for realizing the high-value utilization of PG.
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页数:9
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