Fabrication and Characterization of Lignin Particles and Their Ultraviolet Protection Ability in PVA Composite Film
Fabrication and Characterization of Lignin Particles and Their Ultraviolet Protection Ability in PVA Composite Film
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DOI：
10.1021/acsomega.0c02443
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发表时间：
2020-08-25
期刊：
影响因子：
4.1
通讯作者：
Laosiripojana, Navadol
中科院分区：
文献类型：
--
作者：
Posoknistakul, Pattaraporn;Tangkrakul, Chanasit;Laosiripojana, Navadol
近年来，木质素的先进利用已引起人们的广泛关注。由于目前使用标准木质素的局限性，木质素颗粒在克服这一挑战方面受到了关注。以四氢呋喃（THF）或乙醇为溶剂，采用透析法制备木质素球形颗粒。结果表明，木质素和溶剂的种类、初始木质素浓度和搅拌速率对制备的颗粒大小有较大影响。此外，以四氢呋喃为溶剂制备的木质素颗粒表现出更均匀、对称的球形木质素颗粒。考察了不同pH条件下颗粒分散的稳定性。此外，木质素样品也被引入到聚乙烯醇（PVA）中，用于生产紫外线（UV）阻挡复合膜。并对复合膜的力学性能和光学性能进行了观察。结果表明，制备的木质素-聚乙烯醇复合膜在UVA和UVB区域均表现出良好的紫外线防护潜力。
Recently, lignin utilization in advanced applications has gained much interest. Due to the limitation of the current use of standard lignin, lignin particles have recently gained attention in overcoming the challenge. In this work, the spherical lignin particles obtained from organosolv lignin (OL) were prepared using the dialysis method with tetrahydrofuran (THF) or ethanol as the solvent. From the result, it was found that the types of lignin and solvent, initial lignin concentration, and stirring rate strongly affected the size of fabricated particles. Moreover, the preparation of lignin particles using THF as a solvent showed more uniform and symmetric spherical lignin particles. The stability of the particle dispersion was examined under various pH conditions. Moreover, lignin samples were also introduced into the poly(vinyl alcohol) (PVA) for the production of ultraviolet (UV)-blocking composite film. Mechanical and optical properties of composite film were also observed. As a result, the prepared lignin-PVA composite film showed great ultraviolet (UV) protective potential in both UVA and UVB regions.