Dual-denatured protein for phytate-based systems: Purely bio-based coating featuring high flame retardancy and low hygroscopicity

被引:3
作者
Wang, Yifan [1 ,2 ]
Yang, Guochao [1 ,2 ]
Liu, Yi [1 ,2 ]
Yu, Lei [1 ,2 ]
Guo, Hongwu [1 ,2 ]
机构
[1] Beijing Forestry Univ, Key Lab Wood Mat Sci & Applicat, Minist Educ, Beijing 100083, Peoples R China
[2] Beijing Forestry Univ, Beijing Key Lab Wood Sci & Engn, Beijing 100083, Peoples R China
关键词
Phytic acid; Dual-denatured protein; Flame retardancy; Moisture adsorption; Biobased; PHYTIC ACID; EPOXY ACRYLATE; FUNCTIONALIZATION; PHOSPHORUS;
D O I
10.1016/j.porgcoat.2025.109157
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
To construct a high flame retardant and low moisture absorption biomacromolecule, a bio-based covering was created by combining phytic acid, whey protein, and chitosan. The bio-based flame retardant coating was applied to the wood surface employing water evaporation laminating. Structural investigation of the products of phytic acid and whey protein under heating conditions revealed that the products experienced dual-denatured, namely heat denaturation and acid denaturation. The secondary structural modified in whey protein, including disruption of the spatial structure and peptide bond cleavage. The limiting oxygen index of poplar veneer increased by 22.9 % after flame retardant treatment compared to the pure phytic acid control group. The flame retardant layer provides flame retardancy in both the gas and condensed phase dimensions, thereby considerably increasing the flame retardant performance of composite materials. Covering the coating surface with chitosan film can greatly reduce the hygroscopic defects of phytate-based flame retardants, with the film-coated sample PPCW exhibiting a hygroscopic inhibition rate of 46.92 % after 24 h. Furthermore, this type of treatment can significantly improve the surface coating of water-based paint after utilizing phytic acid-based flame retardants. The hydrogen bonding polymerization of phytic acid-based biomacromolecule has a great potential for use in flame retardant treatment.
引用
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页数:13
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