【摘要】 利用微波辅助法精准控制锆基金属有机框架(UiO-66)的尺寸和形貌，制备了具有高散射效率的UiO-66纳米晶；以其作为高红外辐射功能材料，结合静电纺丝-电喷雾技术和相分离策略，进一步构建了UiO-66功能化的聚乳酸(PLA)多级孔纤维膜（PLA/UiO-66）.得益于微-纳米结构多级孔和UiO-66引入的丰富红外活性基团，PLA/UiO-66多级孔纤维膜展现出良好的太阳反射率和红外发射率，当UiO-66的添加量(质量分数)为12%时，所制备的PLA/UiO-66-12多级孔纤维膜的光学性能更加突出，其平均太阳反射率和平均红外发射率分别高达93.9%和91.2%，远高于Pure PLA纤维膜.在户外测试中，PLA/UiO-66-12多级孔纤维膜的降温幅度明显优于Pure PLA纤维膜，PLA/UiO-66-12纤维膜的平均温度维持在47.6℃，而Pure PLA纤维膜的平均温度则高于50℃.由于UiO-66的引入有效降低了表面能，使PLA/UiO-66多级孔纤维膜具有较大的水接触角(128.8°)，确保其具有优异的疏水性和自清洁能力，为研制高效、可持续的热管理纺织品提供了新策略.更多还原

【Abstract】 By using the microwave-assisted method, the size and morphology of zirconium-based metal-organic frameworks(UiO-66) were precisely controlled to prepare UiO-66 nanocrystals with high scattering efficiency. Employing the UiO-66 nanocrystals as high-infrared-emissivity functional materials, a UiO-66-functionalized polylactic acid(PLA)(PLA/UiO-66) multi-scale porous fiber membrane was further constructed via electrospinning-spraying technology combined with a phase separation strategy. Benefiting from the micro-nano porous design and the introduction of abundant infrared-active groups from UiO-66, the PLA/UiO-66 multi-scale porous fiber membrane exhibited excellent solar reflectivity and infrared emissivity. Particularly when the UiO-66 addition amount was 12%(mass fraction), the optical performance of the resulting PLA/UiO-66-12 multi-scale porous fiber membrane was even more outstanding, achieving an average solar reflectivity of 93.9% and an average infrared emissivity of 91.2%, far exceeding those of the pure PLA fiber membrane. In outdoor tests, the cooling effect of the PLA/UiO-66-12 multiscale porous fiber membrane was significantly superior to that of the pure PLA fiber membrane. The average temperature of PLA/UiO-66-12 multi-scale porous fiber membrane remained at 47.6 ℃, whereas that of the pure PLA fiber membrane was above 50 ℃. While demonstrating excellent cooling performance, the incorporation of UiO-66 effectively reduced the surface energy, endowing the PLA/UiO-66 multi-scale porous fiber membrane with a high water contact angle(128.8°). This ensures the membrane possesses outstanding hydrophobicity and self-cleaning capability, thereby providing a new strategy for developing efficient and sustainable thermal management textiles.更多还原