Dialdehyde sodium alginate bonded dicyandiamide for formaldehyde-free leather production with enhanced properties

被引：15

作者：

Ding, Wei ^{[1
]}

Wang, Yating ^{[2
]}

Sun, Jian ^{[3
,4
]}

Bao, Lihong ^{[2
]}

Pang, Xiaoyan ^{[1
]}

机构：

[1] China Leather & Footwear Res Inst Co Ltd, Beijing 100015, Peoples R China

[2] Beijing Inst Fash Technol, Sch Mat Design & Engn, Beijing 100029, Peoples R China

[3] Beijing Inst Technol, Sch Life Sci, Beijing 100081, Peoples R China

[4] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing 100081, Peoples R China

来源：

CARBOHYDRATE POLYMERS | 2022年 / 295卷

基金：

中国国家自然科学基金;

关键词：

Sodium alginate; Periodate oxidation; Formaldehyde; Chrome-free leather; Filling performance; Physical properties; ADHESIVE; WASTE;

D O I：

10.1016/j.carbpol.2022.119838

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Dialdehyde sodium alginate (DSA) is an eco-crosslinker attracting extensive interest while undergoing limited large-scale applications. Herein, we employed DSA to react with dicyandiamide (DA) for engineering a biomass -derived retanning agent (BDR) towards addressing the long-term toxicity of residual formaldehyde (FA) in leather caused by amino resins. Results confirmed that BDR reserved the structural features of DSA by grafting DA onto DSA molecules. Owing to the suitable molecular weight (main components, 1424-1462 g/mol) and abundant oxygen-containing groups of BDR endowed by DSA, BDR-treated chrome-free leather showed higher hydrothermal stability (82.4 ?), thickening ratio (13.93 %), mechanical strengths (17.2 N/mm(2) for tensile strength and 120 N/mm for tear strength), and fullness compared with industrial dicyandiamide-FA-resin (DFR)-treated leather. The FA-free feature of DSA led to BDR-treated leather containing no FA, while FA in DFR-treated leather reached 591.5 mg/kg. This work provided new insights into broadening the large-scale application scopes of DSA.

引用

页数：8

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