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

doi:10.1016/j.cjche.2024.10.039

摘要/Abstract

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

Abstract: 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.

Key words: Microcrystalline cellulose, Composite membrane, Ionic liquid, Antibacterial efficiency, Mechanical property

Pengcheng Hu, Aonan Lai, Shufeng Zhou. Preparation and properties of antibacterial PVA@MCC composite membrane assisted by ionic liquids and DMSO[J]. 中国化学工程学报, 2025, 79(3): 72-80.

Pengcheng Hu, Aonan Lai, Shufeng Zhou. Preparation and properties of antibacterial PVA@MCC composite membrane assisted by ionic liquids and DMSO[J]. Chinese Journal of Chemical Engineering, 2025, 79(3): 72-80.

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