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Wang X, Han L, Qu S, Feng L, Liang S, Wei C, Liu X, Dang X. New plant polyphenol-derived tannic acid-based chromium-free tanning agent for sustainable and clean leather production. Int J Biol Macromol 2024; 268:131682. [PMID: 38643914 DOI: 10.1016/j.ijbiomac.2024.131682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/04/2024] [Accepted: 04/16/2024] [Indexed: 04/23/2024]
Abstract
This study aimed to prepare a new bio-based chromium-free tanning agent. The green epoxide monocase ethylene glycol diglycidyl ether (EGDE) was grafted with tannic acid (TA) derived from natural plant using the one-pot method to synthesize new plant polyphenol-derived tannic acid-based chromium-free tanning agents (TA-EGDE) with abundant terminal epoxides. FTIR, 1H NMR, XPS, GPC, SEM, and other analytical techniques were used to characterize tanning agents. These consequences manifested that EGDE was successfully grafted with the phenol hydroxyl group of TA. The epoxide value of TA-EGDE showed a tendency to increase and then decrease with increasing EGDE dosage, and the epoxide value of TA-EGDE-2 attained a maximum of 0.262 mol/100 g. GPC analysis showed that the formula weight of the prepared TA-EGDE was partially distributed above 5000 Da. The tanning experiment demonstrated that the shrinkage temperatures (Ts) of the TA-EGDE-tanned leathers were all higher than 81.5 °C. Compared with the traditional commercial chromium-free tanning agent (F-90, TWS), TA-EGDE-tanned leathers exhibited higher Ts and better mechanical properties. The TA-EGDE prepared in this study not only has ecological environmental protection but also provides finished leather with good moisture, heat resistance, and mechanical properties.
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Affiliation(s)
- Xuechuan Wang
- Institute of Biomass and Function Materials & National Demonstration, Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
| | - Lei Han
- Institute of Biomass and Function Materials & National Demonstration, Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China
| | | | | | - Shuang Liang
- Institute of Biomass and Function Materials & National Demonstration, Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China
| | - Chao Wei
- Institute of Biomass and Function Materials & National Demonstration, Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China
| | - Xinhua Liu
- Institute of Biomass and Function Materials & National Demonstration, Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China
| | - Xugang Dang
- Institute of Biomass and Function Materials & National Demonstration, Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
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Lei C, Wang H, Zeng Y, Shi B. A cleaner leather chemical from feather waste for reducing ammonia-nitrogen pollution and improving biological treatment efficiency of tannery wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 342:118311. [PMID: 37276620 DOI: 10.1016/j.jenvman.2023.118311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/17/2023] [Accepted: 05/30/2023] [Indexed: 06/07/2023]
Abstract
Feather waste is produced in millions of tons globally every year, resulting in a waste of biomass resources and even environmental pollution. A sustainable strategy for utilizing feather waste was proposed by preparing a clean deliming agent for ammonia-nitrogen (NH3-N) reduction in leather manufacture and biological treatment efficiency improvement of tannery wastewater. Briefly, chicken feather wastes were deeply hydrolyzed with sulfuric acid, and the optimized keratin hydrolysate (KHopt) that contained 53.6% crude protein and 41.2% amino acids, such as glutamic acid, serine, proline, leucine, phenylalanine, glycine, valine, and arginine, was obtained and used to delime limed cattle hides. The appropriate ratio of amino acids in KHopt gave KHopt a great pH-buffering capacity and maintained a stable float pH of approximately 9 throughout the deliming process. The isoelectric points of KHopt (3.8) and the limed hide (6.3) were both lower than the float pH, thereby bringing about an electrostatic repulsion between the KHopt and the hide surface, which is helpful for KHopt to penetrate and deswell the limed hide rapidly. Moreover, the KHopt deliming effectively removed calcium from the limed hide and achieved leather comparable to conventional leather for commercial applications. KHopt reduced the NH3-N concentrations of deliming effluent and tannery wastewater by 91.1% and 80.6%, respectively, compared with the conventional deliming agent (ammonium sulfate), and dramatically increased the biological treatment efficiency of tannery wastewater. The results showed that efficient and high-value use of feather waste was made by preparing KHopt for sustainable leather manufacturing.
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Affiliation(s)
- Chao Lei
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China
| | - Hao Wang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Yunhang Zeng
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China; College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China.
| | - Bi Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu, 610065, China; College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China
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Ding W, Zhang Y, Li S, Remón J, Wang K, Bao L, Pang X. Novel Biomass-Based Polymeric Dyes: Preparation and Performance Assessment in the Dyeing of Biomass-Derived Aldehyde-Tanned Leather. Polymers (Basel) 2023; 15:polym15102300. [PMID: 37242874 DOI: 10.3390/polym15102300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
High-performance chrome-free leather production is currently one of the most concerning needs to warrant the sustainable development of the leather industry due to the serious chrome pollution. Driven by these research challenges, this work explores using biobased polymeric dyes (BPDs) based on dialdehyde starch and reactive small-molecule dye (reactive red 180, RD-180) as novel dyeing agents for leather tanned using a chrome-free, biomass-derived aldehyde tanning agent (BAT). FTIR, 1H NMR, XPS, and UV-visible spectrometry analyses indicated that a Schiff base structure was generated between the aldehyde group of dialdehyde starch (DST) and the amino group of RD-180, resulting in the successful load of RD-180 on DST to produce BPD. The BPD could first penetrate the BAT-tanned leather efficiently and then be deposited on the leather matrix, thus exhibiting a high uptake ratio. Compared with the crust leathers prepared using a conventional anionic dye (CAD), dyeing, and RD-180 dyeing, the BPD-dyed crust leather not only had better coloring uniformity and fastness but it also showed a higher tensile strength, elongation at break, and fullness. These data suggest that BPD has the potential to be used as a novel sustainable polymeric dye for the high-performance dyeing of organically tanned chrome-free leather, which is paramount to ensuring and promoting the sustainable development of the leather industry.
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Affiliation(s)
- Wei Ding
- China Leather and Footwear Research Institute Co., Ltd., Beijing 100015, China
| | - Yinuo Zhang
- School of Materials Design and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
| | - Shuolin Li
- China Leather and Footwear Research Institute Co., Ltd., Beijing 100015, China
| | - Javier Remón
- Thermochemical Processes Group, Aragón Institute for Engineering Research (I3A), University of Zaragoza, 50018 Zaragoza, Spain
| | - Kanglei Wang
- China Leather and Footwear Research Institute Co., Ltd., Beijing 100015, China
| | - Lihong Bao
- School of Materials Design and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China
| | - Xiaoyan Pang
- China Leather and Footwear Research Institute Co., Ltd., Beijing 100015, China
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Ding W, Remón J, Gao M, Li S, Liu H, Jiang Z, Ding Z. A novel synergistic covalence and complexation bridging strategy based on multi-functional biomass-derived aldehydes and Al(III) for engineering high-quality eco-leather. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 862:160713. [PMID: 36509278 DOI: 10.1016/j.scitotenv.2022.160713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/23/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
To get rid of the chrome pollution faced by the leather industry, we explored a novel engineering high-quality eco-leather technology based on the synergistic interactions between biomass-based aldehydes and Al(III). Firstly, dialdehyde xanthan gum (DXG) was prepared to covalently crosslink with the collagen fibers (CFs) via Schiff-base linkages under alkaline conditions, endowing the leather with a shrinkage temperature (Ts) of 80 °C and opening channels for the subsequent penetration of Al species (AL). Secondly, and for this latter purpose, the DXG-tanned leather was acidified to release part of the DXG from the leather according to the dynamic nature of the Schiff-base. Containing suitable oxygen-containing groups (OGs) with excellent complexation capabilities, the released DXG served as masking agents for AL, facilitating the penetration of AL into the inner CFs network for further complexation crosslinking. Consequently, a denser crosslinking network was constructed in the leather, and the crust leather exhibited higher Ts (82.2 °C), improved mechanical (tensile strength: 13.4 N/mm2, tear strength: 53.3 N/mm) and organoleptic properties than those of the DXG crust or AL crust leathers. This demonstrates that this synergistic covalence and complexation bridging strategy is a sustainable option to substitute highly restricted chrome tanning agent for eco-leather production.
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Affiliation(s)
- Wei Ding
- China Leather and Footwear Research Institute Co. Ltd., Beijing 100015, PR China.
| | - Javier Remón
- Instituto de Carboquímica, CSIC, Zaragoza 50018, Spain
| | - Mi Gao
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, PR China
| | - Shuolin Li
- China Leather and Footwear Research Institute Co. Ltd., Beijing 100015, PR China
| | - Haiteng Liu
- China Leather and Footwear Research Institute Co. Ltd., Beijing 100015, PR China
| | - Zhicheng Jiang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, PR China.
| | - Zhiwen Ding
- China Leather and Footwear Research Institute Co. Ltd., Beijing 100015, PR China
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