Abstract Commercial hair-styling spray is often formulated with multiple components that contribute to toxicity and environmental pollution. In this work, a series of bio-based waterborne polyurethanes (CWPU) as hair styling agent were prepared from castor oil-based polyols. The resulting polyurethane dispersions exhibit excellent storage stability for at least 24 months. The effects of the castor oil functionality and chain extender structure on the particle size of the polyurethane dispersions were systematically investigated. Hair-styling performance and skin irritation tests on animals were also carefully performed to assess styling performance and safety of these CWPUs. A series of CWPU films was successfully prepared to study the relationship between the structure and performance of the bio-based polymer films. The resulting films show low moisture uptake rate, high transmittance, hydrophilicity and good mechanical properties. When CWPU films exhibit Young’s modulus >50 MPa, elongation at break in the 15–300 % range, and moisture uptake

中文翻译：

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来自蓖麻油基多元醇的水性聚氨酯，用于下一代环保美发剂

摘要 商业美发喷雾通常含有多种成分，这些成分会导致毒性和环境污染。在这项工作中，以蓖麻油为基础的多元醇制备了一系列作为头发定型剂的生物基水性聚氨酯（CWPU）。所得聚氨酯分散体在至少 24 个月内表现出优异的储存稳定性。系统地研究了蓖麻油官能度和扩链剂结构对聚氨酯分散体粒径的影响。还仔细进行了动物的头发造型性能和皮肤刺激测试，以评估这些 CWPU 的造型性能和安全性。成功制备了一系列CWPU薄膜以研究生物基聚合物薄膜的结构与性能之间的关系。所得薄膜表现出低吸湿率、高透光率、亲水性和良好的机械性能。当 CWPU 薄膜表现出 >50 MPa 的杨氏模量、15-300% 范围内的断裂伸长率和吸湿率时