皮革科学与工程 ›› 2021, Vol. 31 ›› Issue (5): 6-11.doi: 10.19677/j.issn.1004-7964.2021.05.002

• 试验研究 • 上一篇    下一篇

氧化多糖的相对分子质量对氧化多糖-铝-锆鞣剂鞣制性能的影响

王嘉莹1, 陈强1, 郭雪茹1, 余跃1,2,*, 王亚楠1,2, 石碧1,2   

  1. 1.四川大学制革清洁技术国家工程研究中心,四川 成都 610065;
    2.四川大学皮革化学与工程教育部重点实验室,四川 成都 610065
  • 收稿日期:2021-04-02 出版日期:2021-10-28 上线日期:2021-10-08
  • 通讯作者: *余跃(1991-),男,助理研究员,E-mail:yuyue@scu.edu.cn,主要从事无铬鞣制技术研究。
  • 作者简介:王嘉莹(2000-),女,在读本科生,E-mail:2018141501249@stu.scu.edu.cn。
  • 基金资助:
    国家重点研发计划项目(2017YFB0308500);中央大学基础研究基金(2021SCU12094)

Effect of Relative Molecular Weight of Oxidized Polysaccharide (OP) on Tanning Performance of OP-Al-Zr Complex Tanning Agents

WANG Jiaying1, CHEN Qiang1, GUO Xueru1, YU Yue1,2,*, WANG Yanan1,2, SHI Bi1,2   

  1. 1. National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu 610065, China;
    2. Key Laboratory of Leather Chemistry and Engineering (Sichuan University),Ministry of Education, Chengdu 610065, China
  • Received:2021-04-02 Online:2021-10-28 Published:2021-10-08

摘要: 将不同相对分子质量的氧化多糖(OP)同Al-Zr(AZ)鞣剂进行配位,制备了OP-AZ鞣剂,并研究了OP-AZ鞣剂的鞣制性能。不同相对分子质量的多糖在相同的氧化条件下制备了羧基含量相近(5.7 mmol/g左右)但相对分子质量各异的OP。实验发现,相对分子质量适中的OP2(Mw 3135)可以赋予AZ良好的耐碱稳定性(沉淀pH高于4.0),确保OP2-AZ能均匀渗透入浸酸裸皮并稳定的固定在胶原纤维中,使得鞣革收缩温度达到83.4 ℃,且坯革各项物理性能最优。相对分子质量过高的OP1(Mw 37 363)不利于配合物在皮中的渗透,而相对分子质量过低的OP3(Mw 568)和乳酸(相对分子质量 90)不利于配合物与皮胶原的交联结合。因此,选择适宜相对分子质量的配体才能有效地提升AZ鞣剂的鞣制性能。

关键词: 无铬鞣, 氧化多糖, Al-Zr鞣剂, 配合物鞣剂

Abstract: In this paper, oxidized polysaccharides (OP) with different relative molecular weight were coordinated with Al-Zr tanning agent (AZ) to prepare OP-AZ tanning agents, and the tanning performance of complex tanning agents were investigated. The effect of relative molecular weight of oxidized polysaccharide (OP) on tanning performance of OP-Al-Zr complex tanning agents (OP-AZ) was investigated. The OPs with similar carboxyl group content (about 5.7 mmol/g) but different relative molecular weight were prepared using polysaccharides with different relative molecular weight under same oxidation conditions. Experiments demonstrated that the OP2 with a moderate relative molecular weight (Mw 3135) endowed AZ with good alkali resistance (precipitation pH higher than 4.0) and ensured that OP2-AZ can uniformly penetrate into pickled pelt and be fixed stably in collagen fibers, so that the shrinkage temperature of tanned leather reached 83.4 ℃, resulting in better physical properties of crust leather. OP1 with a high relative molecular weight (Mw 37 363) hindered the penetration of complexes in pelt, while OP3 (Mw 568) and lactic acid (relative molecular weight 90) with low relative molecular weight were not conducive to the cross-linking of the complexes in collagen fibers. Therefore, the appropriate relative molecular weight of ligand is very important in improving tanning performance of AZ tanning agents.

Key words: chrome-free tanning, oxidized polysaccharide, Al-Zr tanning agents, complex tanning agents

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