Mussel-inspired laccase-mediated polydopamine graft onto bamboo fibers and its improvement effect on poly(3-hydroxybutyrate) based biocomposite

被引：9

作者：

Chen, Zhenghao ^{[1
,2
]}

Du, Keke ^{[1
,2
]}

Li, Fei ^{[1
,2
]}

Song, Wei ^{[1
,2
]}

Boukhair, Mustapha ^{[1
,2
]}

Li, Hui ^{[3
]}

Zhang, Shuangbao ^{[1
,2
]}

机构：

[1] Beijing Forestry Univ, Minist Educ, Key Lab Wood Mat Sci & Applicat, Beijing 100083, Peoples R China

[2] Beijing Forestry Univ, Beijing Key Lab Wood Sci & Engn, Beijing 100083, Peoples R China

[3] Washington State Univ, Composite Mat & Engn Ctr, Pullman, WA 99164 USA

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2023年 / 238卷

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Bamboo plastic composite (BPC); Polydopamine; Biocatalysis; ENZYMATIC MODIFICATION; COMPOSITES; CELLULOSE; REINFORCEMENT; BIOPLASTICS; LIGNIN;

D O I：

10.1016/j.ijbiomac.2023.123985

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：

Bamboo fiber (BF) reinforced polyhydroxybutyrate (PHB) has become popular in developing an eco-friendly and sustainable biocomposite, while the weak interfacial compatibility between them is a major problem to over -come. This work, inspired by mussel super adhesion, creates a facile, highly efficient, and environmentally friendly solution based on in situ laccase-catalysed dopamine polymerization under a naturally acidic environ-ment. The result indicates that a stabilized polydopamine coating is successfully grafted onto the lignin of BF, and it also enhances the thermal stability of the BF and biocomposite. Furthermore, modification of BF via laccase-catalysed polydopamine is superior to the conventional method of polydopamine under alkaline con-dition, and has outstanding advantages in terms of BF integrity protection. The optimal composition of bio-composite with BF treated by polydopamine under 1 U/mL concentration of laccase shows improvement in the impact strength, tensile strength, tensile modulus, bending strength, and modulus of elastic by 33.85 %, 9.27 %, 31.74 %, 11.76 %, and 12.92 %, respectively, compared to the unmodified counterpart. This work provides an insightful understanding of the mechanism and benefits of laccase-catalysed polydopamine modification of BF in a natural environment. It contributes to the efficient and environmentally friendly utilization of polydopamine for fabricating high-performance lignocellulosic fiber reinforced biocomposites.

引用

页数：11