Preparation and properties of antibacterial PVA@MCC composite membrane assisted by ionic liquids and DMSO  

作　　者：Pengcheng Hu Aonan Lai Shufeng Zhou 

机构地区：[1]College of Chemical Engineering,Huaqiao University,Xiamen 361021,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第3期72-80,共9页中国化学工程学报(英文版)

基　　金：financial support of the Scientific Research Funds of Huaqiao University(605-50Y17073),Xiamen,China.

摘　　要：The composite membrane of microcrystalline cellulose(MCC)with polyvinyl alcohol(PVA)was effectively synthesized using ionic liquids(ILs)as the solvent and dimethyl sulfone(DMSO)as the co-solvent through the phase conversion method.The effects of IL structure and the IL/DMSO mass ratio on the solubility of MCC were investigated.The findings indicated that the composite solvent functioned as a non-derivative solvent for MCC dissolution.The inclusion of DMSO decreased the viscosity of ILs and enhanced the rate of MCC dissolution.The solubility of MCC reached 14.5%(mass)when the mass ratio of[Bmim]Cl to DMSO was 1:1.The fabricated MCC membrane exhibited a smooth surface and a dense structure.PVA@MCC demonstrated exceptional mechanical properties and a uniform structure at a mass ratio of 2:1,with an elongation at break of 76%and a tensile strength of 14.6 MPa.The effects of antibacterial agents on the morphology,transmittance,mechanical properties,and antibacterial efficiency of PVA@MCC were investigated.The findings revealed that PVA@MCC fortified with clove oil showcased a flat and smooth surface,devoid of stratification or aggregation,and demonstrated superior mechanical properties compared to its counterparts with chitosan and ZnO additions.The elongation at break of PVA@MCC with clove oil increased to 137.6%,while its tensile strength decreased to 10.4 MPa.PVA@MCC with clove oil exhibited an antibacterial efficiency exceeding 68%against Escherichia coli,Staphylococcus aureus,and Pseudomonas aeruginosa,thereby extending the shelf life of cherry tomatoes by an additional four days at ambient temperature.

关 键 词：Microcrystalline cellulose Composite membrane Ionic liquid Antibacterial efficiency Mechanical property 

分 类 号：TS206.4[轻工技术与工程—食品科学]