具有花状金属有机骨架纳米粒子的醋酸纤维素薄膜的机械性能、水蒸气阻隔性能和紫外线屏蔽性能得到改善。
Improved mechanical, water vapor barrier and UV-shielding properties of cellulose acetate films with flower-like metal-organic framework nanoparticles.
机构信息
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
出版信息
Int J Biol Macromol. 2021 Jan 15;167:1-9. doi: 10.1016/j.ijbiomac.2020.11.164. Epub 2020 Nov 27.
Flower-like metal-organic frameworks (Cu-MOF) nanoparticles are successfully synthesized and incorporated into cellulose acetate (CA) matrix to prepare CA-based functional nanocomposite films via a simple solution-casting method. The effect of the incorporation of flower-like Cu-MOF on the morphological, mechanical, thermal, surface wettability, water vapor barrier, cytotoxicity, photostability and UV-shielding properties of CA films is fully investigated. Results reveal that the flower-like Cu-MOF has good compatibility with CA, providing uniform and compact nanocomposite films. The as-prepared nanocomposite films show improved mechanical properties, surface hydrophobicity, water vapor barrier ability compared to neat CA film, and exhibit super UV-shielding capability through the entire UV regions meanwhile retaining a high visible transparency. Moreover, the high transparency and UV-shielding ability of the nanocomposite films can be still maintained even after continuous UV-light (365 nm) irradiation for 12 h. In addition, MTT cytotoxicity assays towards normal human liver cells (HL-7702) reveal high cell viability (over 80%) and good biocompatibility for the CA/Cu-MOF nanocomposite films. These results indicate that the CA/Cu-MOF nanocomposite films with obviously improved physical and functional performances hold significant potential for transparent packaging and UV-protection applications.
花状金属有机骨架（Cu-MOF）纳米粒子被成功合成并掺入醋酸纤维素（CA）基质中，通过简单的溶液浇铸法制备 CA 基功能纳米复合材料薄膜。研究了掺入花状 Cu-MOF 对 CA 薄膜的形态、力学、热学、表面润湿性、水蒸气阻隔性、细胞毒性、光稳定性和紫外屏蔽性能的影响。结果表明，花状 Cu-MOF 与 CA 具有良好的相容性，提供了均匀致密的纳米复合材料薄膜。与纯 CA 薄膜相比，所制备的纳米复合材料薄膜具有改善的力学性能、表面疏水性和水蒸气阻隔能力，并通过整个紫外区域表现出超强的紫外屏蔽能力，同时保持高可见光透明度。此外，即使在连续的 365nm 紫外光照射 12 小时后，纳米复合材料薄膜的高透明度和紫外屏蔽能力仍能保持。此外，MTT 细胞毒性测定法对正常人类肝细胞（HL-7702）的细胞活力表明，CA/Cu-MOF 纳米复合材料薄膜具有高细胞活力（超过 80%）和良好的生物相容性。这些结果表明，具有明显改善的物理和功能性能的 CA/Cu-MOF 纳米复合材料薄膜在透明包装和紫外线防护应用方面具有重要的应用潜力。
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