Oikonomou Evdokia K, Berret Jean-François
Université de Paris, Centre National de la Recherche Scientifique (CNRS), Matière et Systèmes Complexes, 75013 Paris, France.
Materials (Basel). 2021 Oct 1;14(19):5749. doi: 10.3390/ma14195749.
Fabric conditioners are household products used to impart softness and fragrance to textiles. They are colloidal dispersions of cationic double chain surfactants that self-assemble in vesicles. These surfactants are primarily derived from palm oil chemical modification. Reducing the content of these surfactants allows to obtain products with lower environmental impact. Such a reduction, without adverse effects on the characteristics of the softener and its performance, can be achieved by adding hydrophilic biopolymers. Here, we review the role of guar biopolymers modified with cationic or hydroxyl-propyl groups, on the physicochemical properties of the formulation. Electronic and optical microscopy, dynamic light scattering, X-ray scattering and rheology of vesicles dispersion in the absence and presence of guar biopolymers are analyzed. Finally, the deposition of the new formulation on cotton fabrics is examined through scanning electron microscopy and a new protocol based on fluorescent microscopy. With this methodology, it is possible to quantify the deposition of surfactants on cotton fibers. The results show that the approach followed here can facilitate the design of sustainable home-care products.
织物柔顺剂是用于赋予纺织品柔软度和香味的家用产品。它们是阳离子双链表面活性剂的胶体分散体，这些表面活性剂会自组装成囊泡。这些表面活性剂主要来源于棕榈油的化学改性。降低这些表面活性剂的含量可以获得对环境影响较小的产品。通过添加亲水性生物聚合物，可以在不对柔软剂特性及其性能产生不利影响的情况下实现这种降低。在此，我们综述了用阳离子或羟丙基改性的瓜尔胶生物聚合物对配方物理化学性质的作用。分析了在有无瓜尔胶生物聚合物存在的情况下囊泡分散体的电子显微镜和光学显微镜、动态光散射、X射线散射和流变学。最后，通过扫描电子显微镜和基于荧光显微镜的新方案来研究新配方在棉织物上的沉积情况。通过这种方法，可以量化表面活性剂在棉纤维上的沉积量。结果表明，这里采用的方法有助于可持续家居护理产品的设计。
