文章摘要
海藻酸钠/浒苔多糖复合膜的制备及性能
Preparation and Properties of Sodium Alginate/ Enteromorpha polysaccharide Composite Film
投稿时间:2020-08-16  修订日期:2020-08-25
DOI:
中文关键词: 海藻酸钠  浒苔多糖  复合膜  性能
英文关键词: Sodium alginate  Enteromorpha polysaccharide  Composite film  Properties
基金项目:山东省科技重大专项(2019JZZY020613)和青岛市科技发展计划(20-3-4-31-nsh)
作者单位E-mail
邓小雪 中国海洋大学食品科学与工程学院 青岛 17863803440@163.com 
程腾 中国海洋大学食品科学与工程学院 青岛  
赵芸 中国海洋大学食品科学与工程学院 青岛  
许加超 中国海洋大学食品科学与工程学院 青岛  
李昭勇 青岛市纤维纺织品监督检验研究院 青岛 qdlizhy@163.com 
付晓婷 中国海洋大学食品科学与工程学院 青岛  
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中文摘要:
      为探讨海藻酸钠与浒苔多糖的协同作用,本文首次以海藻酸钠和浒苔多糖为基材,甘油为增塑剂制备可降解复合膜。研究了海藻酸钠与浒苔多糖质量比、共混溶液总浓度、甘油含量对复合膜拉伸强度、断裂伸长率、水蒸气透过率和水溶性的影响,同时利用扫描电子显微镜技术(SEM)、傅里叶红外光谱(FTIR)进行微观结构表征。分析结果表明海藻酸钠与浒苔多糖之间具有良好的相容性和协同作用,无明显的相分离现象。添加适量浒苔多糖可提高海藻酸钠膜的拉伸强度和断裂伸长率,降低海藻酸钠膜的水蒸气透过率,但膜水溶性略微提高。在组分质量比为8:2时,膜拉伸强度从99.22 MPa增加到108.41 MPa,断裂伸长率从5.14%增加到6.20%,水蒸气透过率从6.445×10-11 g/(m·s·Pa)降低到6.027×10-11 g/(m·s·Pa),复合膜的综合性能达到最优。并进一步优化了共混总浓度和甘油含量。浒苔多糖的添加增强了海藻酸钠膜的机械性能和阻隔性能。
英文摘要:
      Owing its non-toxic, excellent biodegradability, film-forming property and biocompatibility, sodium alginate (SA) becomes a common and promising raw material of biopolymer film. However, the pure SA films have defects in performance and functionality, thus, blend films consisting of two or more types of components have become desirable as raw materials. To study the synergies of SA and Enteromorpha polysaccharide (EP), degradable composite film blending SA with EP, using glycerol as plasticizer was firstly developed. The effect of different polysaccharide mass ratio, total mixed solution concentration, glycerol content on the tensile strength、elongation at break、water vapor permeation and water solubility of films was investigated. In addition, the microstructure of films was characterized by FTIR and SEM. Results showed good compatibility and synergies between SA and EP. Obvious phase separation of all SA/EP composite films was not observed. Appropriate amount of EP addition improved the tensile strength and elongation at break of the sodium alginate film, and reduced the water vapor transmission rate of the SA film, but the water solubility of the SA/EP composite film slightly increased. When component mass ratio was 8:2, the tensile strength of films increased from 99.22 MPa to 108.41 MPa, the elongation at break increased from 5.14% to 6.20%, the water vapor transmission rate decreased from 6.445×10-11 g/(m·s·Pa) to 6.027×10-11 g/(m·s·Pa), comprehensive optimal mechanical and barrier properties of films were obtained. Besides, the total concentration and glycerol content of SA/EP composite films were further optimized. Therefore, the addition of EP enhanced the mechanical and barrier properties of the SA films. There is a relatively strong synergistic effect between SA and EP.
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