微晶纤维素/改性纳米水滑石/聚乙烯醇抑菌膜的制备与性能  

Preparation and Properties of Microcrystalline Cellulose/Modified Nanohydrotalcite/Polyvinyl Alcohol Antibacterial Films

作　　者：郑秀君 陶煜沛 徐丽英 ZHENG Xiujun;TAO Yupei;XU Liying(School of Food Engineering,Harbin University,Harbin 150086,China)

机构地区：[1]哈尔滨学院食品工程学院,哈尔滨150086

出　　处：《包装工程》2025年第1期65-72,共8页Packaging Engineering

基　　金：黑龙江省自然科学基金(LH2024B007);哈尔滨学院青年博士科研启动基金(HUDF2023206);哈尔滨学院软化学催化及储能新兴材料科技创新团队项目。

摘　　要：目的制备微晶纤维素(MCC)/改性纳米水滑石(SA-SDS-LDH)/聚乙烯醇(PVA)膜,并研究影响该膜性能的因素。方法利用NaOH-NaClO法从花生壳中提取MCC,采用焙烧复原法制备山梨酸钾(SA)、十二烷基硫酸钠(SDS)插层水滑石(LDH)纳米材料(SA-SDS-LDH),采用溶液流延法制备复合膜(MCC/SA-SDS-LDH/PVA)。通过傅里叶变换红外光谱、热重和扫描电镜对复合膜的结构、热稳定性、形貌进行表征,测试其力学性能、吸水率、溶解率和抑菌性能。结果MCC、SA-SDS-LDH与PVA膜的相容性较好;添加SA-SDS-LDH,能够提高PVA膜的热稳定性;添加MCC、SA-SDS-LDH可以提高PVA膜的耐水性;添加(均用质量分数计)MCC(1%)、SA-SDS-LDH(4%)的复合膜,其力学性能优于纯PVA膜;在MCC、SA-SDS-LDH的添加量分别为3%、4%时,复合膜表现出最佳的抑菌效果。结论MCC/SA-SDS-LDH/PVA膜具有较好的抑菌性、力学性能、耐水性、热稳定性,为食品包装领域提供了一种性能优良的抑菌膜。The work aims to prepare microcrystalline cellulose(MCC)/modified nano hydrotalcite(SA-SDS-LDH)/polyvinyl alcohol(PVA)films and investigate factors affecting the properties of the films.The microcrystalline cellulose(MCC)was extracted from peanut shells using the sodium hydroxide hypochlorite method.Nanopowders(SA-SDS-LDH)that were intercalated with sorbate(SA)and dodecyl sulphate(SDS)were prepared using the roasting recovery method and a composite film MCC/SA-SDS-LDH/PVA was prepared using the solution casting method.Fourier transform infrared spectroscopy,differential thermal and scanning electron microscopy were used to characterize the structure,thermal stability,and morphology of the film,and the mechanical properties,water absorption rate,dissolution rate,and antibacterial properties of the composite film were tested.MCC and SA-SDS-LDH were more compatible with the PVA film.The addition of SA-SDS-LDH enhanced the thermal stability of the PVA film,and the addition of both MCC and SA-SDS-LDH enhanced the water resistance of the PVA film.The mechanical properties of the composite film with 1%MCC and 4%SA-SDS-LDH were better than those of pure PVA films.The composite films show the best bacterial inhibition effect when MCC and SA-SDS-LDH are added at 3%and 4%,respectively.The MCC/SA-SDS-LDH/PVA film has better antibacterial,mechanical,water resistant,thermally stable properties.It provides a kind of antibacterial films with excellent performance for food packaging.

关 键 词：微晶纤维素 插层改性 纳米水滑石 聚乙烯醇抑菌膜 

分 类 号：TB34[一般工业技术—材料科学与工程]