Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, PR China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, Shandong 250353, PR China.
Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, PR China.
Int J Biol Macromol. 2024 Nov;281(Pt 2):136238. doi: 10.1016/j.ijbiomac.2024.136238. Epub 2024 Oct 5.
The utilization of environmental friendly and renewable materials has received increasing attention recently. Lignin nanospheres (LNPs) prepared from recovered lignin and residual lignin after DESs and DESs-THF pretreatment were obtained by self-assembly in the present research. Then, films were prepared by incorporating them into polyvinyl alcohol (PVA) solution. The properties of various films were characterized and compared. Results showed that as the LNPs content increased, the UV blocking capacity of the films was gradually enhanced than PVA film. The DES-THF films showed better antioxidant properties up to 69 % due to higher phenolic hydroxyl content. The hydrophobicity of films incorporated with DESs-THF pretreated lignin was consistently better than that of DES pretreated. DES-THF-M films showed a higher T than that of DES-M films, resulting in better thermal stability. Moreover, DES-THF-L films are lighter in color due to a lower degree of condensation, which is favorable to subsequent applications. The incorporation of LNPs improved mechanical and antioxidant properties, thermal stability, and UV shielding ability of PVA films, especially lignin after DES-THF pretreatment. In conclusion, the prepared PVA/LNPs composite films possessed good functional properties that make them potential for packaging materials.
最近，人们越来越关注环保和可再生材料的利用。本研究通过自组装，从回收木质素和 DESs 和 DESs-THF 预处理后的残余木质素中制备了木质素纳米球（LNP），然后将其掺入到聚乙烯醇（PVA）溶液中制备成膜。对各种膜的性能进行了表征和比较。结果表明，随着 LNP 含量的增加，膜的 UV 阻断能力逐渐增强，优于 PVA 膜。由于酚羟基含量较高，DES-THF 膜表现出更好的抗氧化性能，可达 69%。与 DES 预处理相比，掺入 DESs-THF 预处理木质素的膜的疏水性始终更好。DES-THF-M 膜的 T 高于 DES-M 膜，热稳定性更好。此外，DES-THF-L 膜的颜色较浅，因为缩合程度较低，这有利于后续应用。LNP 的掺入提高了 PVA 膜的机械和抗氧化性能、热稳定性和 UV 屏蔽能力，尤其是 DES-THF 预处理后的木质素。总之，所制备的 PVA/LNP 复合膜具有良好的功能特性，有望成为包装材料。
