Microwave-Assisted Acetylated Lignin Loaded into Cellulose Acetate for Efficient UV-Shielding Films  

作　　者：Ahmed M.Khalil Samir Kamel 

机构地区：[1]Photochemistry Department,National Research Centre,Giza,12622,Egypt [2]Cellulose and Paper Department,National Research Centre,Giza,12622,Egypt

出　　处：《Journal of Renewable Materials》2025年第2期401-412,共12页可再生材料杂志(英文)

摘　　要：Developing favorable bio-based polymers that replace petroleum-based plastics is an essential environmental demand.Lignin is a by-product of the chemical pulping industry.It is a natural UV protection ingredient in broad-spectrum(UVA and UVB)sunscreens.It could be partially and selectively acetylated in a simple,fast,and more reliable process.In this work,a composite film was prepared with UV-resistant properties through a casting method.Bio-based cellulose acetate(CA)was employed as a major matrix while nano-acetylated kraft lignin(AL-NPs)was used as filler during synthesizing UV-shielding films loaded with various amounts(1–5 wt.%)of AL-NPs.Kraft lignin was acetylated through a simple and fast microwave-assisted process using acetic acid as a solvent and acetylating agent.The physicochemical and morphological characteristics of the prepared films were evaluated using different methods,including scanning electron microscopy(SEM),Fourier Transform Infrared Spectroscopy(FTIR),X-ray diffraction analysis(XRD),mechanical testing and contact angle measurement.The UV-Vis spectroscopy optical investigation of the prepared films revealed that AL-NPs in the CA matrix showed strong UV absorption.This feature demonstrated the effectiveness of our research in developing UV-resistant bio-based polymer films.Hence,the prepared films can be considered as successful candidates to be applied in packaging applications.

关 键 词：Cellulose acetate microwave-assisted acetylation nano lignin acetate UV-SHIELDING 

分 类 号：O62[理学—有机化学]