A novel chrome-free tanning approach based on sulfonated tetraphenyl Calix[4]resorcinarene: Preparation and application

Zhou, Yongxiang; Ma, Jianzhong; Gao, Dangge; Li, Wenbo; Shi, Jiabo; Ren, Huijun

doi:10.1016/j.jclepro.2018.07.196

Cited by 30 publications

(12 citation statements)

References 18 publications

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“…The second degradation stage between 200 and 550 °C is mainly the breaking of collagen molecular peptide chains. The third stage of 550 and 800 °C is the degradation of residues. , It can be seen in Table that the degradation temperature at 50% mass loss ( T 50% ) of LDH-, P-LDH-, and GEP-LDH-tanned leather increases from 349 °C of pickled pelt to 358, 388, and 403 °C, respectively. The maximum decomposition temperatures of leather tanned by LDHs, P-LDHs, and GEP-LDHs increase from 322 °C of pickled pelt to 329, 348, and 358 °C, respectively.…”

Section: Resultsmentioning

confidence: 99%

Developing Ecofriendly Chrome-Free Leather Processing-Based Polymer-Intercalated Layered Double Hydroxide Supramolecules

Yang,

Ma,

Shi

et al. 2023

ACS Sustainable Chem. Eng.

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Development of eco-friendly chrome-free tanning agents is an inevitable way to realize the sustainable development of the leather manufacturing industry. A sustainable chrome-free leather processing based on polymer-layered double hydroxide (LDHs) supramolecules is reported in this work. P(MAA-IA)-LDH (P-LDH) and GEP(MAA-IA)-LDH (GEP-LDH) supramolecules are constructed by an ion exchange method using P(MAA-IA) (P) and GEP(MAA-IA) (GEP) as intercalators, strengthening the interface interaction between the supramolecules and collagen fibers by improving their dispersion in the resulting leather. Our results indicate that P and GEP enter the LDH interlayer and increase the interlayer distance of P-LDHs and GEP-LDHs from 0.783 nm of LDHs to 1.252 and 1.158 nm, respectively, resulting in an increase in the specific surface areas of P-LDHs and GEP-LDHs. Moreover, compared with LDHs, P-LDHs and GEP-LDHs can be more easily diffused into collagen fibers and uniformly bound onto collagen fiber strands and between the collagen fibrils. The hydrogen bond, ionic bond, and coordination bond formed among collagen with LDH supramolecules can stabilize the integral triple-helical conformation of collagen, giving the resulting leather enhanced thermal stability, porosity, mechanical properties, enzymatic resistance, and decreased swelling ratio. Meanwhile, the incorporation of LDH supramolecules can improve the flame retardancy and smoke suppression property of the resulting leather, and the peak heat release rate (PHRR), total heat release (THR), and smoke production rate (SPR) of GEP-LDH tanned leather decrease by 23.1, 45.1, and 55.5%, respectively, in comparison to those of the pickled pelt. The GEP-LDH tanned leather exhibits better multifunctional properties due to more uniform dispersion in collagen fibers. Moreover, the absorption rate of dyes (91.2%) and fatliquoring agents (85.7%) of GEP-LDH tanned leather is higher than that of F-90 and TWS, close to the traditional chromium tanning agents, and the GEP-LDH tanning system exhibits a better degradability in comparison with the F-90 and TWS tanning systems. This work provides insights for developing a sustainable chrome-free leather system for versatile eco-leather manufacture.

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Section: Resultsmentioning

confidence: 99%

Developing Ecofriendly Chrome-Free Leather Processing-Based Polymer-Intercalated Layered Double Hydroxide Supramolecules

Yang,

Ma,

Shi

et al. 2023

ACS Sustainable Chem. Eng.

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“…The shrinkage temperature ( T s ) is the most commonly used index to characterize the hydrothermal stability of leather. 47 The T s values of pickled hide and tanned leather were determined using a leather T s tester (MSW-YD4, Sunshine Electronic Research Institute, China). The thermal stability of the lyophilized leather sample was further measured using a TG-DSC thermal analyzer (STA-8000, PerkinElmer, USA).…”

Section: Methodsmentioning

confidence: 99%

Biomass-derived aldehyde tanning agents with in situ dyeing properties: a ‘Two Birds with One Stone’ strategy for engineering chrome-free and dye-free colored leather

2022

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“…Nowadays, the demand for chrome-free tanning technology has increased significantly in China [1][2][3][4] since conventional chrome tannage is subjected to great restriction due to the discharges of Cr-containing wastewater and solid wastes [5,6]. However, few of the existing chromefree tanning technologies have been widely used as alternatives of chrome tannage on an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

Interaction between retanning agents and wet white tanned by a novel bimetal complex tanning agent

Huang

Song

et al. 2020

J Leather Sci Eng

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A promising and practical chrome-free tanning system has been developed based on a novel Al-Zr bimetal complex tanning agent. However, to achieve satisfactory resultant leather, the retanning process that is compatible with this emerging tannage needs to be investigated systematically. This paper aims to explore the interaction between the bimetal complex tanned wet white and retanning agents. The isoelectric point (pI) of wet white was 7.2, which was nearly the same as wet blue. The electropositivity of wet white was even higher than that of wet blue during post-tanning processes, resulting in higher uptake rate of retanning agents. The distribution of various retanning agents in wet white was analyzed by pI measurement of layered leather and fluorescent tracing technique. The retanning agents were unevenly distributed throughout the cross-section, which might be an important restriction factor in obtaining satisfactory organoleptic properties of the crust leather. This fact is mainly due to the strong electrostatic interaction between anionic retanning agents and wet white. Applying a high dosage of multiple retanning agents in a proper sequence of addition benefited the full penetration of retanning agents in leather matrix and thus improved the organoleptic properties of crust leather. This work provides guidance for optimizing retanning process of the wet white leather.

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A novel chrome-free tanning approach based on sulfonated tetraphenyl Calix[4]resorcinarene: Preparation and application

Cited by 30 publications

References 18 publications

Developing Ecofriendly Chrome-Free Leather Processing-Based Polymer-Intercalated Layered Double Hydroxide Supramolecules

Developing Ecofriendly Chrome-Free Leather Processing-Based Polymer-Intercalated Layered Double Hydroxide Supramolecules

Biomass-derived aldehyde tanning agents with in situ dyeing properties: a ‘Two Birds with One Stone’ strategy for engineering chrome-free and dye-free colored leather

Interaction between retanning agents and wet white tanned by a novel bimetal complex tanning agent

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