College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212100, People's Republic of China.
Int J Nanomedicine. 2024 Aug 20;19:8485-8499. doi: 10.2147/IJN.S470122. eCollection 2024.
With the development of technology, personal heat management has become a focus of attention. Phase change fabrics, as intelligent materials, are expected to be widely used in multiple fields, bringing comfortable, intelligent and convenient living experience.
In this study, miniature phase change microcapsules (MPCM) with n-octadecane as core and poly(methyl methacrylate) as shell were successfully prepared. Using the in-situ reduction property of polydopamine, gold nanoparticles were deposited on the surface of the microcapsules, which retained the heat storage function and imparted photothermal and antibacterial properties. The MPCM with photothermal conversion function was modified on the surface of silk fabric using aqueous polyurethane after verified by comprehensive material characterisation techniques.
Under the near infrared light of 808 nm wavelength and 0.134 W/cm² irradiation intensity, the MPCM@PDA@Au modified silk fabrics showed excellent photothermal conversion performance, which could be increased from 25°C to 60°C in 50s. After the light source was cut off, the fabrics showed good heat release ability, with melting enthalpy and crystallisation enthalpy reaching 41.58 J/g and 43.3 J/g, respectively, which were not changed after repeated cycles. After the light source is cut off, the fabric has good heat release ability, and the enthalpy of melting and crystallisation reaches 41.58 J/g and 43.3 J/g, respectively, and the photothermal efficiency remains unchanged after many cycles of use, which proves that it has excellent durability and stability. The antimicrobial test shows that the fabric has significant antibacterial effect on Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus).
MPCM@PDA@Au silk fabrics bring new possibilities for the future of personal thermal management and antimicrobial protection in the field of medical health, outdoor sports and other areas of broad application prospects, heralding the birth of a series of innovative applications and solutions.
随着科技的发展，个人热管理已成为关注焦点。作为智能材料的相变织物有望在多个领域得到广泛应用，为人们带来舒适、智能、便捷的生活体验。
本研究成功制备了以正十八烷为芯材、聚甲基丙烯酸甲酯为壳材的微型相变微胶囊（MPCM）。利用聚多巴胺的原位还原性能，在微胶囊表面沉积了金纳米粒子，保留了其储热功能，并赋予其光热和抗菌性能。采用水性聚氨酯对经综合材料特性技术验证后的丝织物表面进行改性，得到具有光热转换功能的 MPCM。
在 808nm 波长和 0.134W/cm²辐照强度的近红外光照射下，MPCM@PDA@Au 修饰的丝织物表现出优异的光热转换性能，在 50s 内可从 25°C升温至 60°C。关闭光源后，织物表现出良好的放热能力，熔融焓和结晶焓分别达到 41.58J/g 和 43.3J/g，且经多次循环后没有变化。关闭光源后，织物仍具有良好的放热能力，熔融焓和结晶焓分别达到 41.58J/g 和 43.3J/g，且经过多次使用后光热效率保持不变，证明其具有优异的耐久性和稳定性。抗菌试验表明，该织物对大肠杆菌（E.coli）和金黄色葡萄球菌（S.aureus）具有显著的抗菌效果。
MPCM@PDA@Au 丝织物为个人热管理和医疗保健、户外运动等领域的抗菌保护带来了新的可能，预示着一系列创新应用和解决方案的诞生。
