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

Wei Ding; Yating Wang; Jian Sun; Lihong Bao; Xiaoyan Pang

doi:10.1016/j.carbpol.2022.119838

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

Wei Ding, Yating Wang, Jian Sun^*, Lihong Bao, Xiaoyan Pang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

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 °C), thickening ratio (13.93 %), mechanical strengths (17.2 N/mm² 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.

Original language	English
Article number	119838
Journal	Carbohydrate Polymers
Volume	295
DOIs	https://doi.org/10.1016/j.carbpol.2022.119838
Publication status	Published - 1 Nov 2022
Externally published	Yes

Keywords

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

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10.1016/j.carbpol.2022.119838

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title = "Dialdehyde sodium alginate bonded dicyandiamide for formaldehyde-free leather production with enhanced properties",

abstract = "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 °C), thickening ratio (13.93 \%), mechanical strengths (17.2 N/mm2 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.",

keywords = "Chrome-free leather, Filling performance, Formaldehyde, Periodate oxidation, Physical properties, Sodium alginate",

author = "Wei Ding and Yating Wang and Jian Sun and Lihong Bao and Xiaoyan Pang",

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year = "2022",

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doi = "10.1016/j.carbpol.2022.119838",

language = "English",

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T1 - Dialdehyde sodium alginate bonded dicyandiamide for formaldehyde-free leather production with enhanced properties

AU - Ding, Wei

AU - Wang, Yating

AU - Sun, Jian

AU - Bao, Lihong

AU - Pang, Xiaoyan

PY - 2022/11/1

Y1 - 2022/11/1

N2 - 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 °C), thickening ratio (13.93 %), mechanical strengths (17.2 N/mm2 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.

AB - 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 °C), thickening ratio (13.93 %), mechanical strengths (17.2 N/mm2 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.

KW - Chrome-free leather

KW - Filling performance

KW - Formaldehyde

KW - Periodate oxidation

KW - Physical properties

KW - Sodium alginate

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DO - 10.1016/j.carbpol.2022.119838

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

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Keywords

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