Improved mechanical, water vapor barrier and UV-shielding properties of cellulose acetate films with flower-like metal-organic framework nanoparticles
Improved mechanical, water vapor barrier and UV-shielding properties of cellulose acetate films with flower-like metal-organic framework nanoparticles
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花状金属有机骨架纳米颗粒改善了醋酸纤维素薄膜的机械、水蒸气阻隔和紫外线屏蔽性能，国际生物大分子杂志
DOI：
10.1016/j.ijbiomac.2020.11.164
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发表时间：
2021-01-15
影响因子：
8.2
通讯作者：
Zou, Zhiming
中科院分区：
文献类型：
--
作者：
Chen, Kui;Yu, Jingling;Zou, Zhiming
采用简单的溶液浇铸法成功合成了花状金属有机骨架（Cu-MOF）纳米粒子，并将其引入醋酸纤维素（CA）基体中制备了CA基功能纳米复合薄膜。全面研究了引入花状Cu-MOF对CA膜的形态、机械、热、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，提供均匀，致密的纳米复合膜。所制备的纳米复合膜显示出改善的机械性能，表面疏水性，水蒸气阻隔能力相比，纯CA膜，并表现出超级紫外线屏蔽能力，通过整个紫外线区域，同时保持了高的可见光透明度。此外，在365 nm紫外光连续照射12 h后，纳米复合膜仍保持较高的透明性和紫外屏蔽能力。此外，对正常人肝细胞（HL-7702）的MTT细胞毒性试验显示，CA/Cu-MOF纳米复合膜的高细胞活力（超过80%）和良好的生物相容性。这些结果表明，CA/Cu-MOF纳米复合薄膜具有显着改善的物理和功能性能的透明包装和紫外线防护应用具有显着的潜力。(C)2020 Elsevier B. V.保留所有权利。
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 solutioncasting 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. (C) 2020 Elsevier B.V. All rights reserved.