纳米微晶纤维素复合膜的制备及性能分析  

Preparation and Properties Analysis of Nanocrystalline Cellulose Composite Films

作　　者：柴翠元[1] CHAI Cuiyuan(College of Pharmacy and Materials,Huainan Union University,Huainan 232038,Anhui,China)

机构地区：[1]淮南联合大学制药与材料学院,安徽淮南232038

出　　处：《韶关学院学报》2024年第3期6-11,共6页Journal of Shaoguan University

基　　金：安徽省教育厅重点科研项目(2022AH052927);安徽省教育厅职业教育创新发展试验区培育库项目(WBRHFZ-052);安徽省教育厅重点科研项目(KJ2020A0897)。

摘　　要：以具有可持续性和环保特点的棉纤维为原料制备纳米微晶纤维素(NCC),再通过硫酸水解法简单高效地制得NCC悬浮液,将该悬浮液与壳聚糖混合,制备出NCC复合膜.利用万能试验机测试NCC复合膜的力学拉伸性能,同时用拟杯子法测试NCC复合膜的透湿性、用覆盖油脂的过氧化值测试NCC复合膜的阻氧性、用分光光度计测试NCC复合膜的透光性、用金黄色葡萄球菌和大肠杆菌测试NCC复合膜的抗菌性,最后用细胞培养试验评估复合膜对人体细胞的毒性.结果表明,NCC用量在45%质量分数时,制备的NCC复合膜拉伸强度最大、力学性能最高、断裂界面更粗糙;NCC复合膜水蒸气透过率保持在2.8×10^(-11) g·(m·s·Pa)^(-1)以上;NCC复合膜氧气阻隔性的过氧化值在2.0以上;经过与NCC复合膜32 min的接触,金黄色葡萄球菌和大肠杆菌接近完全被杀灭;24 h人体细胞存活率在70%以上.综上,所制备的NCC复合膜性能优良,值得开发.Nanocrystalline cellulose(NCC)was prepared by using sustainable and environmentally friendly cotton fibers as raw materials,and then a simple and efficient suspension of nanocrystalline cellulose was prepared by sulfuric acid hydrolysis method.The suspension was mixed with chitosan to prepare a composite film of nanocrystalline cellulose.The mechanical and tensile properties of the composite film were tested by a universal testing machine,the moisture permeability of the composite film was tested by simulated cup method,the oxygen resistance of the composite film was tested by the peroxide value of the oil covering,the transparency of the composite film was tested by a spectrophotometer,the antibacterial properties of the composite film were tested by Staphylococcus aureus and Escherichia coli.And finally,the toxicity of the composite film to human cells was evaluated by a cell culture test.The results showed that when the dosage of nano microcrystalline cellulose was 45%by mass,the composite film prepared had the highest tensile strength,mechanical properties,and rougher fracture interface;the water vapor transmittance of NCC composite membrane remains at 2.8×10^(-11) g·(m·s·Pa)^(-1 )or above;the peroxide value of the oxygen barrier of the composite membrane is above 2.0;after 32 minutes of contact with the composite membrane,Staphylococcus aureus and Escherichia coli were almost completely killed;the 24-hour survival rate of human cells is over 70%.In summary,the prepared nano microcrystalline cellulose composite film has excellent performance and is worth developing.

关 键 词：纳米微晶 纤维素 复合膜 透湿性 阻氧性 透光性 抗菌性 

分 类 号：TB332[一般工业技术—材料科学与工程]