A high-strength bonding, water-resistance, flame-retardant magnesium oxychloride cement based inorganic adhesive via the construction of supramolecular system

被引：21

作者：

Zhou, Wenguang ^{[1
]}

Ye, Qianqian ^{[2
]}

Zhou, Zhezhe ^{[1
]}

Liu, Zheng ^{[1
]}

Aladejana, John Tosin ^{[3
]}

Cao, Jinfeng ^{[1
]}

Li, Jianzhang ^{[1
]}

机构：

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

[2] Jiujiang Univ, Coll Chem & Chem Engn, Jiujiang 332005, Jiangxi, Peoples R China

[3] Nanjing Forestry Univ, Coll Mat Sci & Engn, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Longpan Rd 159, Nanjing 210037, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2023年 / 419卷

基金：

中国国家自然科学基金;

关键词：

Bionic structure; Nanoconfinement; Magnesium oxychloride inorganic adhesive; Water resistance; Bonding strength; PULVERIZED FUEL ASH; PHOSPHORIC-ACID;

D O I：

10.1016/j.jclepro.2023.138239

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Magnesium oxychloride cement (MOC) adhesive has the advantages of being non-formaldehyde and flame retardant and having low energy consumption; however, its poor compatibility with the wood interface results in low bonding strength. Inspired by the H-bonded & beta;-sheets nanoconfinement phase of spider silk, a highperformance inorganic adhesive was developed based on the supramolecular network system of poly (vinyl alcohol)/phytic acid (PVA/PA) with dissolved ions and the synchronous hydration process of MOC. Benefiting from the H-bond crosslinking and chelation confinement effects, the addition of PVA/PA enables MOC to penetrate steadily into the wood. Under this strategy, the compressive strength and softening coefficient of the modified MOC adhesive were 65.07 MPa and 0.84, which were 17.03% and 425% higher than the unmodified MOC adhesive, respectively. In addition, the MOC/PVA/PA adhesive achieved a wet shear strength of 2.02 MPa, 68.3% higher than that of the MOC adhesive. These results demonstrate that the MOC/PVA/PA adhesive would be a promising inorganic adhesive in wood-based building materials.

引用

页数：10

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