Development of a Smart, Anti‐Water Polyurethane Polymer Hair Coating for Style Setting

Objective The goal of this work was to develop a novel polyurethane polymer coating for the surface of the hair that could be used for style setting via the shape memory effect (SME). The features of the films are in accordance with conventional hair styling methods used in the laboratory. Methods In this study, a new polyurethane polymer was synthesized; the morphology and mechanical behaviour of the coated hair were systematically investigated using a scanning electron microscope (SEM) and an Instron 5566 (with a temperature oven). The SME of the hair was tested using a 35-g weight and over five washing and drying cycles. Results The experimental result shows that the polyurethane polymer has effects on the mechanical behaviour of the hair. It indicates that the fixed shape (at 22°C) and recover rate (at 60°C) of different casted thickness films are similar. And the stress of the film becomes larger with increasing film thickness. Furthermore, the shape memory ability could be endowed with the hair styling using this polymer; the hair fibre could recover to the 65% of its original shape after five cycle deformation by 35 g mass under the heat-treated condition; it could recover its original setting styling even after 5th water washing and drying. The SEM results indicated that the microsurface of the hair is coated with the polymer membrane; it contributes to the shape memory ability of the coated hair to keep and recover to the original setting styling. The styling hair can return to the original hair because the polyurethane polymer can be washed out by water with suitable strength and shampoo totally which does not leave any flake. Conclusion The polyurethane polymer-based hair setting agent has been developed successfully, and it could be coated evenly on the human hair with good hand feeling and SMEs. The SME is highly related to the quantity of polyurethane polymer solution, and the effect could be improved by increasing the solution quantity. The maximum deformation of the coated hair could be recovered 94% at 75°C, once its shape is changed by an external force. The treated hair can withstand warm water rinsing for at least five cycles, and it can keep 65% of its original setting style after water rinsing. The polyurethane polymer could be totally removed by shampooing the hair and hot towel covering for 5–10 min. This research provides an effective way for the development of new intelligent shaping agents. Resume Objectif dans les presents travaux dont l'objectif est de mettre au point une nouvelle utilisation de bâches plastiques, de polyurethane aux cheveux revetements des surfaces a une certaine forme de memoire les cheveux. Modes d'utilisation courants et attestes ces polymeres traditionnels comme la coiffure, la creation en laboratoire. Methodologie dans cette etude, une nouvelle synthese, de polyurethane et sur la tete pendant ces performances physiques, les machines, les lecteurs optiques, DianJing chauffage caisses robustes etirage. Un memoire forme egalement des effets des cheveux 35 g des poids et la remise en etat a ete etirage, 5 a ete le cycle de lavage et de sechage memoire du terrain. Resultat les resultats indiquent que la mecanique de cheveux polymere de polyurethane ont eu un impact de performance. Elle compare les membranes l’epaisseur des polymeres (forme fixe dans 22°C) et les taux de restauration (dans 60°C) sont differentes. La tension aux films augmente par rapport a la l’epaisseur. En outre, la capacite de memoire polymeres qui forme stereotypee des cheveux blonds, revetements de fibres polymeres a 35 g de l'exterieur, chauffage etirage se laver la cinquieme cycle deformation des cheveux, apres avoir initialement coiffure peut reprendre de 65%. D'apres les resultats DianJing scannees cheveux surface egale polymere colis; Cheveux contribue a maintenir et retablir la creation initiale. Revetements des cheveux peut revenir apres que les cheveux, car les polymeres de polyurethane peuvent etre utilises, le cas echeant, XiFaShui laver intenses friction, leaving apres la chasse d'eau. Conclusions Les cheveux des polymeres de polyurethane stereotypes ont ete couronnes de succes, qu'elle puisse tartine fine unie sur la tete et maintenir les bonnes ShouGan cheveux memoire et la forme. Les polymeres de polyurethane dans la solution de sulfite de sodium forme un memoire lui-meme, c'est -a-dire en augmentant l'utilisation des solutions pour ameliorer les polymeres a revetement des cheveux, apres qu'a le role de deformation du relevement apres le °C 94% des 75. Le traitement abordable revetements des cheveux chaudes rincage d'au moins cinq cycles, faire garder 65% de l'eau qu'ils avaient mis en place coiffure. Les polymeres de polyurethane peuvent etre utilises, le cas echeant, peut XiFaShui chaleur serviette 5 a 10 minutes. La presente etude a des stereotypes qui mettent au point de nouveaux types d'agents intelligence.