文献类型：期刊文献

英文题名：A Room-Temperature Curing Plant Protein-Based Adhesive with High Strength and Flame Retardancy for Heat-Free Adhesion

作者：Jiang, Ke[1] Dong, Xuemei[2] Chen, Yuan[1] Fan, Dongbin[1] Chu, Fuxiang[1]

第一作者：Jiang, Ke

通信作者：Fan, DB[1];Chu, FX[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]China Testing & Certificat Int Grp Co Ltd, Beijing 100024, Peoples R China

年份：2024

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20241816014309);Scopus(收录号：2-s2.0-85191739684);WOS:【SCI-EXPANDED(收录号:WOS:001215935600001)】；

基金：This study was financially supported by the National Key Research and Development Program of China (No. 2022YFD2200701).

语种：英文

外文关键词：bio-based adhesives; flame retardancy; plant proteins; room-temperature curing; water resistance

摘要：Plant protein-based adhesives are gaining traction owing to their low cost and eco-friendliness. However, achieving flame retardancy and long-term water resistance in them under room-temperature curing conditions remains a challenge due to the hydrophilicity and low reactivity of plant proteins. Herein, a novel adhesive synthesized from soybean meal (SM), activated sodium alginate (aSA), nano-hydroxyapatite (nHA), and polyamidoamine-epichlorohydrin (PAE) resin addresses this challenge. aSA as a reactive bio-based cross-linker formed covalent cross-linking structures with SM matrix at room temperature, while the nHA-induced biomineralization and PAE-constructed supramolecular cross-linking promote water drainage from the adhesive, preventing water erosion of the adhesive structure. The developed adhesive shows versatility across multiple substrates, with its wet shear strength on wood reaching 0.76 MPa, surpassing that of the commercial aldehyde-based adhesive. The adhesive is effective over a wide temperature range from room temperature to 150 degrees C due to the reactivity of the PAE resin above 60 degrees C. Moreover, it exhibits excellent flame retardancy (limiting oxygen index of 31.2%) owing to its dense structure and the abundance of N-containing and P-containing components. This work is expected to break the monopoly of petroleum-based adhesives in the realm of room-temperature adhesives. A plant protein-based adhesive with high strength under room temperature curing conditions is achieved by N-hydroxysuccinimide ester grafting, biomineralization, and supramolecular cross-linking. The adhesive exhibits universal adhesion across various substrates, and its adhesion shear strength on wood remains 0.76 MPa after 3 h of soaking in water at 63 degrees C. The limiting oxygen index of the adhesive reaches 31.2%. image