文章摘要
厚朴提取物对甲基纤维素复合膜结构及性能的影响
Influence of Magnolia Bark Extract on the Structure and Properties of Methyl Cellulose Composite Films
  
DOI:10.16865/j.cnki.1000-7555.2018.08.012
中文关键词: 厚朴提取物  甲基纤维素复合膜  抗菌性能  抗氧化性能  力学性能
英文关键词: Magnolia Bark Extract  methyl cellulose composite membranes  antibacterial property  antioxidant property  mechanical properties
基金项目:国家自然科学基金资助项目(51493245);广州市科创委(B41520707)
作者单位
何 娟1, 钟 乐1,2, 李湘銮1, 肖乃玉1,2, 王 琴3 1. 仲恺农业工程学院 轻工食品学院 包装工程系广东 广州 510225 2. 广东省食品绿色包装工程技术研发中心广东 广州 510225 3. 仲恺农业工程学院 轻工食品学院 食品科学系广东 广州 510225 
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中文摘要:
      采用溶液浇注法将厚朴提取物填充到聚乙烯醇-400增塑的甲基纤维素(MC)包装膜中以进行改性,研究厚朴提取物添加量对甲基纤维素包装膜的抗氧化性能、抗菌性能、力学性能、阻隔性能和外观的影响,并采用红外光谱、X射线衍射和扫描电镜对其结构进行分析。结果表明,厚朴提取物的添加赋予膜较强的抗菌性能和抗氧化性能,厚朴提取物添加量为5%时,牛津杯法测得金黄色葡萄球菌和大肠杆菌的抑菌圈直径分别为21 mm和19 mm,且膜的DPPH自由基清除率可达到80.3%;随厚朴提取物的增加,膜的阻隔性能及膜在高湿度环境中的力学性能有所降低,当厚朴提取物添加量从0%增至20%时,膜的透气度增大了27.5%,拉伸强度下降了20.7%,且复合膜的红度(a*)和黄度(b*)值有所升高,但复合膜的总色差(ΔE)、亮度(L)、透明度和透光率(T)降低。
英文摘要:
      The Magnolia Bark Extract was filled into methyl cellulose (MC) packaging membrane by solution intercalation technique in order to modify MC-based films. The influence of Magnolia Bark Extract content on antioxidant property, mechanical properties, barrier properties and appearance of the MC composite package materials was evaluated, and the structures of the composite membranes were analyzed by FT-IR,XRD and SEM. The results show that the addition of Magnolia Bark Extract makes antibacterial and antioxidant properties of the films improve. Adding 5% Magnolia Bark Extract, the inhibition zone of Staphylococcus aureus and Escherichia coli is 21 mm and 19 mm in diameter respectively by oxford cup method, and the DPPH radical scavenging rate of the membrane is 80.3%. With the increase of Magnolia Bark Extract, the barrier properties, physical and mechanical properties of the membranes decrease in high humidity. When the amount of Magnolia Bark Extract is from 0% to 20%, the permeability of the film increases by 27.5%, the tensile strength decreases by 20.7%. Furthermore, Magnolia Bark Extract/MC composite membranes have the higher a* and b*, but the composite membranes show a decrease in ΔE, L, transparency and transmittance (T).
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