期刊
GREEN CHEMISTRY
卷 23, 期 16, 页码 5924-5935出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1gc01538a
关键词
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资金
- National Key R&D Program of China [2017YFB0308502]
- National Natural Science Foundation of China [21808133, 21804084]
- China Postdoctoral Science Foundation [2021M692000]
- Science and Technology Project of Xianyang City [2018k02-28]
- Xian yang Science and Technology Project [2018k02-28]
- Basic Research Project of Wenzhou City [2019Y1073]
A series of epoxy-terminated hyperbranched poly-(amine-ester) materials (EHBPs) were synthesized and proved to be a promising tanning agent for environmentally benign leather manufacturing, with significantly improved leather properties, enhanced porosity and preferable biodegradability.
Leather manufacturing is the main recycling technology used for nature skin biomass resources. However, leather-based products are made by the conventional chrome tanning method, in which the discharge of chrome-containing wastes poses potential threats to the environment and public health. By comparison, the aldehyde/chrome-free tanning strategy is ecologically advantageous for the manufacturing of leather. Therefore, a series of epoxy-terminated hyperbranched poly-(amine-ester) materials (abbreviated as EHBPs) were synthesized in this study using epichlorohydrin modified hydroxyl-terminated hyperbranched poly-(amine-esters) (HHBPs). The characterization and testing of the as-obtained EHBP tanning agent showed significantly improved hydrothermal stability of the treated leather with the shrinkage temperature (T-s) exceeding 75 degrees C, good physical properties, and a relevant thickening ratio (>50%). Besides, the EHBP tanning approach ensured a high dispersity of collagen fibers with substantially enhanced porosity (control 41% and EHBP-tanned leather > 51%). The environmental impact assessment revealed the preferable biodegradability of EHBPs (BOD5/COD > 0.3). In sum, the proposed EHBP-based tanning approach looks promising for the realization of environmentally benign leather manufacturing for next-generation green chrome-free tanning.
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