Dong Yingying, Qiu Yan, Gao Die, Zhang Kailian, Zhou Kai, Yin Honggang, Yi Gaoyi, Li Jun, Xia Zhining, Fu Qifeng
Institute of Engineering Thermophysics, School of Energy and Power Engineering, Chongqing University Chongqing 400030 China
School of Pharmacy, Southwest Medical University Luzhou Sichuan 646000 China
RSC Adv. 2019 Oct 18;9(58):33617-33624. doi: 10.1039/c9ra07466j.
Most commercial permanent hair dyeing technologies are based on the oxidative process of -phenylenediamine and its derivative materials. However, concerns about their toxicological issues have been raised throughout the years. Herein, we report an innovative surface coloration strategy for fabricating melanin-mimetic multicolor and low-toxicity hair dyes through sodium periodate-induced rapid deposition of eumelanin-like polydopamine (PDA) and pheomelanin-like PDA/cysteine co-deposited coatings on the hair surface. The color and morphology of the resulting hair were characterized in detail by several spectroscopy methods and the possible mechanism for the multi-coloring effects and structural differences of the melanin-mimetic coating was proposed. Our strategy eliminates the use of toxic dye precursors or organic solvents, and the favorable safety of the PDA-based formulations is demonstrated. The fabricated dyes can be applied to hair simply by combing, resulting in uniform multi-coloring effects within a short time. Furthermore, the melanin-mimetic hair dyes have excellent durability and ultraviolet protection performance. This work provides a facile and versatile methodology to develop the next generation of safe, sustainable and multicolor hair dyes and pave new avenues for advancing the field of surface coloration, nanoreactors, nanogenerators, energy storage materials and biomimetic sensing devices.
大多数商业永久性染发技术基于对苯二胺及其衍生物材料的氧化过程。然而，多年来人们一直对其毒理学问题表示担忧。在此，我们报告了一种创新的表面着色策略，通过高碘酸钠诱导真黑素样聚多巴胺（PDA）和褐黑素样PDA/半胱氨酸共沉积涂层在头发表面快速沉积，来制备模仿黑色素的多色低毒染发剂。通过多种光谱方法详细表征了所得头发的颜色和形态，并提出了模仿黑色素涂层的多色效果和结构差异的可能机制。我们的策略避免了使用有毒的染料前体或有机溶剂，并证明了基于PDA配方的良好安全性。制备的染料只需通过梳理即可应用于头发，在短时间内产生均匀的多色效果。此外，模仿黑色素的染发剂具有出色的耐久性和紫外线防护性能。这项工作为开发下一代安全、可持续的多色染发剂提供了一种简便通用的方法，并为推进表面着色、纳米反应器、纳米发电机、储能材料和仿生传感设备领域开辟了新途径。
