Functional nanocomposite based on waterborne polyurethane and layered double hydroxide as a flame retardant for leather

Ma, Jianzhong; Chen, Hou; Li, Wenbo; Zhou, Yongxiang; Sun, Xiaomin

doi:10.1016/j.jclepro.2022.134966

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…The excellent flame retardancy is related to the dispersion and binding of LDH supramolecular nanosheets in collagen fibers. The LDH supramolecular nanosheets can decompose into water vapor and carbon dioxide during combustion, absorbing some of the heat and lowering the oxygen content . Furthermore, compared to the pickled pelt, the smoke production rate (SPR) of leather tanned by LDHs, P-LDHs, and GEP-LDHs decreased by 36.1, 49.2, and 55.5%, respectively (Figure d), which can be due to the large specific surface area and surface adsorption of composite metal oxides formed by the thermal decomposition of LDH supramolecular nanosheets, exhibiting better adsorption performance for the smoke produced by the combustion of leather .…”

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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“…2,3 Compared with the limited production and expensive price of natural leather, microfiber leather has higher production efficiency and lower cost, and it is frequently utilized in furniture decoration, automobiles, luggage, clothing, footwear, and other fields. [4][5][6] However, both components of microfiber leather are highly flammable, which is a major safety hazard in practical applications, and hence it is crucial to prepare microfiber leather with fire resistance. 7,8 At present, the preparation of flame-retardant microfiber leather includes two main methods: one is flame-retardant finishing of microfiber leather and the other is treating the PU to be fire resistant.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a flame-retardant waterborne polyurethane with core–shell structure and its application in a fire-resistant microfiber synthetic leather

Yin,

Li,

Yao

et al. 2024

Polym. Chem.

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“…For example, Ma et al added modified LDH nanoparticles as a flame-retardant for WPUs and obtained samples with a limiting oxygen index (LOI) value of only 25.9% when the LDH usage was as high as 10%. Moreover, poor dispersion and compatibility also bring about a weakening in the strength and toughness of WPUs [ 15 ]. Zhao et al applied an ionic liquid flame-retardant “[Dmim]Tos” containing phosphorus and nitrogen element to waterborne polyurethanes.…”

Section: Introductionmentioning

confidence: 99%

Robust, Flame-Retardant, and Anti-Corrosive Waterborne Polyurethane Enabled by a PN Synergistic Flame-Retardant Containing Benzimidazole and Phosphinate Groups

et al. 2023

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Waterborne polyurethanes (WPUs) have attracted great interest owing to their environmentally friendly properties, and are wildly applied in production and daily life. However, waterborne polyurethanes are flammable. Up to now, the challenge remains to prepare WPUs with excellent flame resistance, high emulsion stability, and outstanding mechanical properties. Herein, a novel flame-retardant additive, 2-hydroxyethan-1-aminium (2-(1H-benzo[d]imidazol-2-yl)ethyl)(phenyl)phosphinate (BIEP-ETA) has been synthesized and applied to improve the flame resistance of WPUs, which has both phosphorus nitrogen synergistic effect and the ability to form hydrogen bonds with WPUs. The WPU blends (WPU/FRs) exhibited a positive fire-retardant effect in both the vapor and condensed phases, with significantly improved self-extinguishing performance and reduced heat release value. Interestingly, thanks to the good compatibility between BIEP-ETA and WPUs, WPU/FRs not only have higher emulsion stability, but also have better mechanical properties with synchronously improved tensile strength and toughness. Moreover, WPU/FRs also exhibit excellent potential as a corrosion-resistant coating.

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Functional nanocomposite based on waterborne polyurethane and layered double hydroxide as a flame retardant for leather

Cited by 8 publications

References 39 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

Preparation of a flame-retardant waterborne polyurethane with core–shell structure and its application in a fire-resistant microfiber synthetic leather

Robust, Flame-Retardant, and Anti-Corrosive Waterborne Polyurethane Enabled by a PN Synergistic Flame-Retardant Containing Benzimidazole and Phosphinate Groups

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