不同粒径的LNPs对淀粉基包装膜性能的影响  

The influence of LNPs with different particle sizes on the properties of starch⁃based packaging films

作　　者：杜光武 郑涛 林宝凤[1] DU Guangwu;ZHENG Tao;LIN Baofeng(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《包装与食品机械》2025年第1期63-70,共8页Packaging and Food Machinery

基　　金：国家自然科学基金项目(22175045);广西自然科学基金重大项目(2021GXNSFDA220005)。

摘　　要：为改善淀粉基包装膜的性能,采用高速剪切的方法获得不同粒径的木质素纳米颗粒(LNPs),并添加到淀粉/聚乙烯醇中,制备含有不同粒径的LNPs的淀粉基薄膜(CP@LNPs)。通过红外光谱、扫描电镜等方法,研究不同粒径的LNPs对薄膜表面结构、疏水性、抗紫外、抗菌及力学性能的影响。结果表明,粒径在245~992 nm的LNPs能在薄膜表面构筑出荷叶仿生疏水结构,显著提高薄膜的疏水、抗紫外和抗菌性能。当LNPs的含量为5%且粒径为245.1 nm时,由薄膜表面2.36μm粒径的LNPs团聚体形成的疏水结构,使薄膜的水接触角由78.01°提升至104.03°;LNPs与淀粉形成的分层动态界面使薄膜的拉伸应力提升24.7%,抗紫外能力提高23.4%,并且薄膜还保持73%的透明度;薄膜对大肠杆菌和金黄色葡萄球菌的杀菌率分别达到85.0%和92.3%。研究结果为开发高性能淀粉复合膜提供新的思路和方法。To enhance the performance of starch-based packaging films,lignin nanoparticles(LNPs)with different particle sizes were prepared using a high-speed shearing method and incorporated into starch/polyvinyl alcohol(PVA)to fabricate starch-based films containing LNPs(CP@LNPs).The effects of LNPs with varying particle sizes on the film's surface structure,hydrophobicity,UV resistance,antibacterial properties,and mechanical performance were investigated through Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),and other analytical techniques.Results demonstrated that LNPs with particle sizes ranging from 245 to 992 nm could construct a lotus leaf-inspired hydrophobic structure on the film surface,significantly improving hydrophobicity,UV resistance,and antibacterial performance.When the LNPs content was 5%with a particle size of 245.1 nm,the hydrophobic structure formed by LNP aggregates(2.36μm)on the film surface increased the water contact angle from 78.01°to 104.03°.The hierarchical dynamic interface formed between LNPs and starch enhanced the tensile stress by 24.7%,improved UV resistance by 23.4%,while maintaining 73%transparency.Additionally,the films exhibited bactericidal rates of 85.0%and 92.3%against Escherichia coli and Staphylococcus aureus,respectively.This study provides novel insights and methodologies for developing high-performance starch composite films.

关 键 词：淀粉薄膜 木质素纳米颗粒 疏水结构 抗紫外性能 抗菌性能 

分 类 号：TS206.4[轻工技术与工程—食品科学]