材料科学
复合数
生物高聚物
石墨氮化碳
复合材料
生物降解
透射率
耐久性
电磁屏蔽
傅里叶变换红外光谱
可见光谱
紫外线
化学工程
聚合物
光催化
光电子学
有机化学
化学
工程类
催化作用
作者
Md. Mehedi Hasan,M. A. Hossain,Md Didarul Islam,Md. Mahfuzur Rahman,Aditi Sarker Ratna,Samrat Mukhopadhyay
标识
DOI:10.1021/acsami.3c05659
摘要
Flexible, transparent, and biodegradable films that can shield dangerous UV and high-energy blue light (HEBL) are high in demand to satisfy the ever-increasing expectations for environmental sustainability. To achieve this goal, biopolymer alginate is an excellent choice that has an outstanding film-forming ability. However, alginate has the limitation of poor UV and HEBL blocking ability. Thus, in this study, UV and HEBL blocker graphitic carbon nitride (g-C3N4) was incorporated in alginate films to enhance the compatibility, applicability, and durability. The ATR-FTIR, TGA, DTG, and FE-SEM results indicated that the composite film formation was due to hydrogen bonding, and the composite films revealed synergistic properties of alginate and g-C3N4. Though the incorporation of g-C3N4 in films enhanced the mechanical and thermal stabilities of the films, the films were still flexible. The UV–visible transmittance characterization confirmed that the prepared films could block both UV and HEBL radiation while maintaining transparency in visible regions. In experiments involving only 2 wt % g-C3N4, nearly 90% of UV (200–400 nm) and 95% of HEBL (400–450 nm) irradiation were blocked. Additionally, the inclusion of g-C3N4 also facilitated the biodegradation process of composite films. Moreover, after 6 months, the composite films exhibited excellent UV and HEBL shielding with excellent mechanical durability.
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