生物基静电纺纳米纤维膜的制备及其抗紫外线性能研究

Preparation of bio-based electrostatic spinning nanofiber membrane and its anti-UV performance study

为缓解塑料造成的白色污染、降低紫外线对紫外光敏产品的影响,选择可生物降解的聚乙烯醇(PVA)作为成膜基材,以去离子水为溶剂,木质素磺酸钠(LS)为抗紫外线剂,采用静电纺丝技术制备了具有紫外线防护功能的可生物降解PVA/LS复合纳米纤维膜。研究了LS对PVA/LS复合纳米纤维膜微观形貌、抗紫外线性能及透光率的影响。结果表明:PVA/LS复合纳米纤维膜的纤维形貌良好无串珠产生;LS添加量为4.5%(质量分数)时,复合纳米纤维膜对中波紫外线(UVB)、长波紫外线(UVA)的屏蔽率分别达到82.3%、65.4%,抗紫外线性能远优于纯PVA纳米纤维膜;PVA/LS复合纳米纤维膜在波长555nm处的透光率均大于70%,在阻挡部分可见光能量的同时保持了良好的透明度。

To alleviate the white pollution caused by plastics and reduce the adverse effects of UV light on UV-sensitive products,biodegradable polyvinyl alcohol(PVA)was chosen as the film-forming substrate,deionized water as the solvent,and sodium lignosulfonate(LS)as the anti-UV agent to prepare biodegradable composite nanofiber membranes with UV protection through electrostatic spinning technology.The effects of LS on the microscopic morphology,UV resistance and light transmission of PVA/LS composite nanofiber membranes were investigated.The results showed that:the fiber morphology of PVA/LS composite membrane was good without beads.When the LS content was 4.5%(mass fraction),the shielding rate of the composite nanofiber membrane against UVB and UVA reached 82.3%and 65.4%,respectively,and the anti-UV performance was much better than that of pure PVA membrane.The light transmission rate of PVA/LS composite membrane at wavelength 555 nm was greater than 70%,maintaining good transparency while blocking part of the visible light energy.