钟乐,曾绮颖,肖乃玉,罗文翰,何娟,余倩,柳建良.硬脂酸对聚乙烯醇膜水果包装保鲜性能的影响[J].包装工程,2019,40(15):67-73.
ZHONG Le,ZENG Qi-ying,XIAO Nai-yu,LUO Wen-han,HE Juan,YU Qian,LIU Jian-liang.Effect of Stearic Acid on the Preservation of Fruit Packaging with Polyvinyl Alcohol Film[J].Packaging Engineering,2019,40(15):67-73. |
| 硬脂酸对聚乙烯醇膜水果包装保鲜性能的影响 |
| Effect of Stearic Acid on the Preservation of Fruit Packaging with Polyvinyl Alcohol Film |
| 投稿时间：2019-03-19 修订日期：2019-08-10 |
| DOI：10.19554/j.cnki.1001-3563.2019.15.011 |
| 中文关键词: 聚乙烯醇 耐水性 硬脂酸 保鲜包装 |
| 英文关键词: polyvinyl alcohol water resistance modification stearic acid packaging preservation |
| 基金项目:国家自然科学基金（51493245）；广州市科技计划（B41520707）；广州市科创委重大民生专项（B31720726） |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 研究硬脂酸改性聚乙烯醇膜对水果保鲜性能的影响。方法 采用溶液浇注法，以硬脂酸为改性剂，并辅以硬脂酸-96为乳化剂，聚乙二醇-400为增塑剂，对聚乙烯醇(PVA)膜进行改性，利用FT-IR对其结构进行分析，考察硬脂酸的添加量对膜的耐水性、拉伸强度、断裂伸长率和外观等包装性能的影响，并以西梅为保鲜对象，通过定期对西梅的呼吸强度、可溶性固含量和质量损失率进行测定，进行西梅的鲜度分析，评估改性膜的保鲜效果。结果 硬脂酸与聚乙烯醇之间形成了酯键，膜的耐水性能得到明显提高，当硬脂酸的质量分数从0%增大至20%时，透湿度从294.42 g/(m2•h)降至75.99 g/(m2•h)，降低了74.19%，溶解度从26.85%降至12.90%，膜的拉伸强度、断裂伸长率和透明度也略有降低；与空白组和PVA膜组对照，硬脂酸/PVA组将西梅的呼吸跃变峰值推迟了2 d，明显降低了西梅的质量损失率，延缓了可溶性固形物含量变化速率，硬脂酸/PVA组将西梅的货架期延长了3.3 d。结论 采用硬脂酸改性聚乙烯醇，可增强膜的耐水性能，且提升了膜的包装强度，增强了膜的保鲜效果。 |
| 英文摘要: |
| The work aims to study the effect of stearic acid modified polyvinyl alcohol film on fruit preservation. The solution casting method was adopted. Polyvinyl alcohol (PVA) film was modified with stearic acid as modifier, stearic acid-96 as emulsifier and polyethylene glycol-400 as plasticizer. Its structure was analyzed by FT-IR. The effects of stearic acid addition on the water resistance, tensile strength, elongation at break and appearance of the film were investigated. With prune as the preserved object, its respiration intensity, soluble solid content and weight loss rate were measured regularly, and the freshness of the prune was analyzed to evaluate the preservation effect of the modified film. Ester bond was formed between stearic acid and polyvinyl alcohol, and the water resistance of the film was improved obviously. When the content of stearic acid increased from 0% to 20%, the moisture permeability decreased from 294.42 g/(m2•h) to 75.99 g/(m2•h), which decreased by 74.19%. The solubility decreased from 26.85% to 12.90%. The tensile strength, elongation at break and transparency of the film decreased slightly. Compared with blank group and PVA film group, the stearic acid/PVA group delayed the respiratory climacteric peak of prune for 2 days, and decreased the weight loss rate of prune obviously. Stearic acid/PVA group extended the shelf life of prune by 3.3 days. Polyvinyl alcohol modified by stearic acid can enhance the water resistance, the packaging strength and the preservation effect of the film. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501716号