Li Tianyi, Li Bin, Ji Yali, Wang Lili
College of Science, Northeast Forestry University, Harbin 150040, China.
Polymers (Basel). 2018 Oct 8;10(10):1112. doi: 10.3390/polym10101112.
Luminescent and UV-shielding bio-polymers have seldom been reported. Zinc oxide quantum dots (ZnOQD) (~3.2 nm) was synthesized by a short-term sol-gel method. ZnOQD possessed a crystal lattice spacing of 0.28 nm and a hexagonal wurtzite structure. Luminescent and UV-shielding ZnOQD/carboxymethylcellulose sodium (CMC) nanocomposite polymer films were successfully fabricated by incorporating ZnOQD into a CMC matrix through a solution casting method. Thermal analysis demonstrated that the ZnOQD reduce the thermal decomposition rate of CMC, and a large number of ZnOQD can promote the catalytic degradation of ZnOQD/CMC nanocomposites. Furthermore, ZnOQD/CMC hybrid polymer films exhibited photoluminescence with maximum emission wavelength at 525 nm. More significantly, ZnOQD/CMC showed prominent UV-absorbing capability. Such ZnOQD/CMC nanocomposite polymer films are promising in UV-shielding and optical applications.
发光且具有紫外线屏蔽功能的生物聚合物鲜有报道。通过短期溶胶 - 凝胶法合成了氧化锌量子点（ZnOQD）（约3.2纳米）。ZnOQD具有0.28纳米的晶格间距和六方纤锌矿结构。通过溶液浇铸法将ZnOQD掺入羧甲基纤维素钠（CMC）基质中，成功制备了发光且具有紫外线屏蔽功能的ZnOQD/羧甲基纤维素钠（CMC）纳米复合聚合物薄膜。热分析表明，ZnOQD降低了CMC的热分解速率，大量的ZnOQD可促进ZnOQD/CMC纳米复合材料的催化降解。此外，ZnOQD/CMC杂化聚合物薄膜表现出光致发光，最大发射波长为525纳米。更显著的是，ZnOQD/CMC表现出突出的紫外线吸收能力。这种ZnOQD/CMC纳米复合聚合物薄膜在紫外线屏蔽和光学应用方面具有广阔前景。
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