Amphiphilic acrylate copolymer fatliquor for ecological leather: Influence of molecular weight on performances

Du, Jinxia; Shi, Lu; Peng, Biyu

doi:10.1002/app.43440

Cited by 19 publications

(8 citation statements)

References 16 publications

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“…Meanwhile, when the number average molecular weight of amphiphilic acrylate copolymer fatliquor is within 9000–15,000, the copolymer has good permeability and absorptive capacity. It will further endow leather with excellent physical and mechanical properties 50 …”

Section: Application Of Amphoteric Materials In Leathermentioning

confidence: 99%

“… (A) Chemical structure of amphiphilic acrylate copolymer fatliquor; (B) Penetration of five copolymers and conventional sulfonated rapeseed oil fatliquor (Dowellor SS); (C) Physical and mechanical properties of fatliquored leathers. Reprinted with permission from Reference 50. Copyright 2016, Wiley, Periodicals, Inc…”

Section: Application Of Amphoteric Materials In Leathermentioning

confidence: 99%

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Amphoteric functional polymers for leather wet finishing auxiliaries: A review

Wang

Liu

et al. 2021

Polymers for Advanced Techs

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Amphoteric functional polymers containing anionic and cationic groups have the advantages of pH‐responsive function, self‐assembly, and anti‐polyelectrolyte effect, which have been diffusely applied in the healthcare industry, leather area, and so forth. Very recently, with the development of organic chrome‐free tanned ecological leather manufacturing technology, the anionic retanning and fatliquoring agents for traditional chrome tanning system have gradually lost their dominant position due to the weak interactions between positively charged collagen fibers and negatively charged wet finishing auxiliaries, resulting in a series of problems such as low dye uptake, uneven dyeing, and so forth. To address this issue, recent researches have been devoted to developing amphoteric polymers for leather retanning and fatliquoring processes. In this review, we give a comprehensive overview of the preparation and application of amphoteric materials for leather retanning and fatliquoring agents. With the perspective of their properties, current challenges, and outlook in the future, crafting functional and environmentally friendly amphoteric materials are further put forward. The development and application of amphoteric polymer wet finishing auxiliaries will greatly promote the integrated manufacturing of ecological leather, and further motivate the upgrading, transformation, and sustainable development of the traditional leather industry.

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Section: Application Of Amphoteric Materials In Leathermentioning

confidence: 99%

Section: Application Of Amphoteric Materials In Leathermentioning

confidence: 99%

Amphoteric functional polymers for leather wet finishing auxiliaries: A review

Wang

Liu

et al. 2021

Polymers for Advanced Techs

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“…Bio-based natural animal fats and vegetable oils are widely employed as natural oils to prepare fatliquors. Various functional groups, such as hydroxy, carboxyl, amino, sulfonic acid, and phosphoric acid groups, − have been introduced into the molecular chain of animal fats and vegetable oils by a chemical modification method, which can not only improve the molecular weight of the fatliquors but also increase the intermolecular interaction strength with the leather collagen, thus reducing the fogging phenomenon in a high-temperature environment. , In the work reported by Yu et al, jatropha oil was epoxidized, esterified, and co-polymerized via a three-step process to introduce reactive −COOH and −OH groups, which formed strong interactions with the −NH 2 groups of the leather collagen. Although the leather fatliquored with jatropha oil-based fatliquors exhibited a significantly lower fogging value (0.89 mg), the chemical modification process was complicated, and the structure–property relationship between the chemical structure of the fatliquors and the fogging value of the fatliquored leather was not clear.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the Structure of Modified Ricinoleic Acids via the Thiol–Ene Click Reaction and the Fogging Value of Fatliquored Leather

Zhang

Liu

et al. 2022

ACS Sustainable Chem. Eng.

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Herein, hydroxylated, aminated, and carboxylated ricinoleic acids (RA-OH, RA-NH 2 , RA-COOH) are individually prepared via facile and efficient thiol−ene click reactions with renewable ricinoleic acid and commercially available sulfhydryl compounds as raw materials. The resulting modified ricinoleic acids are subsequently used as natural oils to prepare environmentally friendly fatliquors for automotive interior leather of a low fogging value. Further, the influence of the molecular structure of the three modified ricinoleic acids on the fogging value and free grease content of the fatliquored leather is systematically studied by molecular dynamics simulation theoretical predictions and regular experimental characterization. The introduction of −OH, −NH 2 , and −COOH to ricinoleic acid can increase its ability to form strong intermolecular interactions with leather collagen fibers, as confirmed by the E binding values from molecular dynamics simulations. The interaction strength of modified ricinoleic acids and leather collagen is in the order RA-OH > RA-COOH > RA-NH 2 > RA, leading to a low migration rate of modified ricinoleic acids and an obvious lubricating effect on the collagen fibers. Among them, RA-OH shows the strongest intermolecular interaction with leather collagen and is difficult to migrate from the collagen matrix; thus, the RA-OH fatliquored leather exhibits the lowest fogging value of 6.38 mg, the lowest free grease content of 12.36%, and excellent softness and physical and mechanical properties. Overall, a combination of renewable ricinoleic acids with "green" thiol−ene click reactions provides a new strategy for the preparation of sustainable fatliquors for automotive interior leather of a low fogging value, and the wastewater after fatliquoring is also biodegradable, all of which contribute to the sustainable development of the fatliquors in the leather industry.

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“…It was observed that many polymers, after coating, may improve important characteristics of pristine leather like the flexibility and water‐vapor permeability . It was recognized that methacrylic polymers can be conveniently used for leather modification to improve mechanical properties or durability without compromising on unique advantageous characteristics of leather . The photo‐oxidative stability of most of the methacrylic polymers is fairly high, which can also be tuned by incorporating various functional groups .…”

Section: Introductionmentioning

confidence: 99%

Nanoconjugates of methacrylic polymers: Synthesis, characterization, and immobilization to leather

Ayyappan

Prakash

Jaisankar

et al. 2019

J of Applied Polymer Sci

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Imparting superhydrophobicity to surfaces has direct implications for developing water-repellent materials. Most hydrophobic materials cannot be applied directly to specific surfaces like leather because of noncompatibility. Although methacrylic polymers are compatible to leather, their inherent hydrophilic characteristics make it challenging to use for introducing hydrophobicity or superhydrophobicity. In this article, we present a strategy of introducing hydrophobicity in various degrees as well as superhydrophobicity to different surfaces, particularly leather and glass surfaces by using conjugates of methacrylic polymers and various carbon nanomaterials. The covalent functionalization of methacrylate polymers with carbon nanotubes and fullerenes was performed by radical polymerization in the presence or absence of chain transfer agents (CTAs). CTA was used during polymerization to introduce carboxylic acid group, necessary for chromium-assisted binding to leather to avoid leaching. A balance between the compatibility of the polymer nanoconjugates with the leather and the amount necessary for coating stabilization was studied by a rheometer. While water contact angle measurement indicated the mild hydrophobicity in most cases, we were delighted to observe superhydrophobicity in one case presumably due to increased roughness because of the presence of specific nanomaterial to overcome inherent hydrophilicity of methacrylic polymers.

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Amphiphilic acrylate copolymer fatliquor for ecological leather: Influence of molecular weight on performances

Cited by 19 publications

References 16 publications

Amphoteric functional polymers for leather wet finishing auxiliaries: A review

Amphoteric functional polymers for leather wet finishing auxiliaries: A review

Relationship between the Structure of Modified Ricinoleic Acids via the Thiol–Ene Click Reaction and the Fogging Value of Fatliquored Leather

Nanoconjugates of methacrylic polymers: Synthesis, characterization, and immobilization to leather

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