Page 158 - 《精细化工》2021年第6期

第 38 卷第 6 期 精 细 化 工 Vol.38, No.6
202 1 年 6 月 FINE CHEMICALS June 2021

皮革化学品
蓖麻油改性两性聚氨酯复鞣剂的制备及应用

王学川 1,2 ，蓝晓梅 1,2 ，朱 兴 1,2 ，刘新华 1,2 ，孙思薇 2,3

（1. 陕西科技大学 轻工科学与工程学院，陕西 西安 710021；2. 陕西科技大学 生物质与功能材料研究
所，陕西 西安 710021；3. 陕西科技大学 化学与化工学院，陕西 西安 710021）

摘要：以异氟尔酮二异氰酸酯和聚四氢呋喃二醚醇为原料、2,2-二羟甲基丙酸为阴离子扩链剂、N-甲基二乙醇胺
为阳离子扩链剂，制备了两性聚氨酯乳液，接着使用蓖麻油改性两性聚氨酯得到产物（COWPU）。通过 FTIR
对其进行了表征，采用纳米粒度及 zeta 电位仪对 COWPU 乳液的粒径及等电点进行了测试，采用 TG 对 COWPU
膜进行了热性能测试。随后将其用于有机无铬鞣剂 TWS 鞣制绵羊皮服装白湿革的复鞣工序。结果表明，COWPU
已成功制备，具有显著的两性特征（等电点为 6.29）和良好的生物降解性〔5 日生化需氧量（BOD 5 ）与化学需氧
量（COD）的比值为 0.37〕，经 COWPU 复鞣后的坯革的撕裂强度为 43.15 N/mm，抗张强度为 9.99 MPa，均优于
市售两性丙烯酸复鞣剂复鞣后的坯革。此外，COWPU 还对坯革有一定的柔顺作用，有望实现复鞣-加脂一体工艺。
关键词：蓖麻油；改性；两性聚氨酯；无铬鞣皮革；复鞣剂；皮革化学品
中图分类号：TS 529.2 文献标识码：A 文章编号：1003-5214 (2021) 06-1220-08

Preparation and application of castor oil modified

amphoteric polyurethane retanning agent

1,2
2,3
1,2
1,2
1,2
WANG Xuechuan , LAN Xiaomei , ZHU Xing , LIU Xinhua , SUN Siwei
（1. College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an
710021, Shaanxi, China; 2. Institute of Biomass & Functional Materials, Shaanxi University of Science & Technology,
Xi'an 710021, Shaanxi, China; 3. College of Chemistry and Chemical Engineering, Shaanxi University of Science &
Technology, Xi'an 710021, Shaanxi, China）
Abstract: Amphoteric polyurethane emulsion was prepared by using isophorone diisocyanate and
polytetrahydrofuran diether alcohol as raw materials, 2,2-dimethylolpropionic acid as anionic chain
extender and N-methyldiethanolamine as cationic chain extender. Then, the product (COWPU) was
obtained by modifying amphoteric polyurethane with castor oil. The particle size and isoelectric point of
COWPU emulsion were measured by nano particle size and Zeta potentiometer. The thermal properties of
COWPU film were tested by TG. Then, COWPU used in retanning process of white wet sheepskin garment
leather with organic chrome-free tanning agent TWS. The results showed that COWPU was successfully
prepared and had significant amphiprotic characteristics (isoelectric point of 6.29) and good
biodegradability [5-day biochemical oxygen demand (BOD 5)/chemical oxygen demand (COD) = 0.37]. The
tear strength (43.15 N/mm) and tensile strength (9.99 MPa) of the leather retanned by COWPU were better
than those of the leather retanned by commercially available amphoteric acrylic retanning agent. In addition,
COWPU possessed a certain softening effect on leather, which had the potential to realize an integrated
process of fatliquoring and retanning.
Key words: castor oil; modification; amphoteric polyurethane; chrome-free tanned leather; retanning agent;
leather chemicals

[1]
随着人们环保意识的增强，有机无铬鞣剂及鞣 法受到了越来越多的关注 。与铬鞣革相比，有机

收稿日期：2020-12-25; 定用日期：2021-01-25; DOI: 10.13550/j.jxhg.20201234
基金项目：“十三五”国家重点研发计划（2017YFB0308500）；国家自然科学基金（2207081675）
作者简介：王学川（1963—），男，教授，E-mail: wxc-mail@163.com。