基于两亲性MXene保温皮革涂饰材料的构筑及构效关系研究

提升皮革的保温性是满足人们需求及实现皮革高值化的重要手段。提高皮革自身温度以增加热量来源，并提升皮革隔热性能以降低散热速率是实现该目标的有效方法。但皮革自身的微观结构局限了其自增热和隔热性能。本项目设计了“自发热-隔热”双层结构表面涂层以协同解决自增热和隔热问题。拟将两亲性MXene用于聚丙烯酸酯的Pickering乳液聚合，并引入中空SiO2，通过MXene的高效光热转换能力和中空SiO2的隔热性构筑“自发热-隔热”结构的保温皮革。调控MXene的两亲性，获得其稳定Pickering乳状液的机理；探索聚合条件对构筑MXene光热转换涂层性能的影响规律；引入聚多巴胺防止MXene氧化，考察聚多巴胺对MXene稳定性及涂层光热性能的影响规律；利用中空SiO2的自沉降行为，构筑“自发热-隔热”双层结构的皮革涂层，建立复合涂层光热隔热性能的构效关系。本研究将为功能型皮革的开发提供一定的理论指导。

Improving the thermal insulating performance of leather in low temperature outdoor environment is an important means to meet people's daily needs and increase the additional value of leather. Raising the temperature of the leather itself to increase the source of heat, and improving leather insulation to reduce the rate of heat loss are effective methods to realize the purpose. However, the microstructure of leather limits its performances on spontaneous heating and insulating. In this project, amphiphilic MXene are used as solid particle stabilizer in the Pickering emulsion polymerization of polyacrylate latex. Hollow SiO2 is introduced in the latex at the same time. “Spontaneous heating-insulating” structured leather is constructed by MXene with efficient photothermal conversion capability and hollow SiO2 with heat insulation property. Stabilizing mechanism of Pickering lactescence is investigated by adjusting the amphipathy of MXene. The effects of emulsion polymerization conditions on MXene photothermal conversion capability in finishing are studied. Polydopamine is used to prevent MXene from oxidation and further analyzed on the photothermal conversion capability of composite coating. The structure-activity relationship between photothermal and heat insulating of composite leather finishing is established by investigating the self-setting behavior of hollow SiO2 and photothermal conversion capability of MXene. This research will provide the theory instruction for designing other functional leather.