目的 为了给口腔护理产品提供一种新型包装方式,研究开发出一种具有高力学性能和溶解速率的聚乙烯醇基水溶性膜。方法 将聚乙烯醇和麦芽糊精按照一定比例混合,并加入聚乙二醇作为增塑剂,利用涂布法制得一系列水溶性膜,通过单因素和正交实验分析水溶膜的力学性能和溶解性能,并验证其在包装口腔护理产品时的应用效果。结果 正交实验结果显示,当溶质质量分数为0.18 g/mL、溶质质量比（聚乙烯醇∶麦芽糊精）为3∶1、增塑剂与溶液的体积比0.009时所制得的水溶性膜的综合评分最高,其抗拉强度和断裂伸长率分别为42.06 MPa和218.58%,溶解时间为41.57 s,较纯聚乙烯醇膜相比分别增强3.78%、41.78%,溶解时间缩短了49.54%。用该水溶性膜对无水牙膏和牙粉进行包装后测试其溶解效果,牙粉包展现出优秀的溶解速率,20 s后整体溶解分散于水中,牙膏包溶解速率较慢,60 s后整体溶解完全。结论 正交实验确定的最优组水溶性膜表现综合性能最佳的力学性能与溶解性能。微观表征显示其表面结构致密,各组分间相容性良好,具有良好的功能化基础。傅里叶红外光谱证实,体系的稳定性主要源于组分间较强的氢键相互作用。水接触角测试表明,不同组分的水溶膜均具有一致的润湿行为,具有良好的储存稳定性。此外,热分析曲线中各组分吸热峰差异微弱,结合衍射图谱表现出的聚乙烯醇特征结晶性,进一步验证了体系的均一性。综上所述,该水溶膜在口腔护理产品的新型包装领域具有应用潜力。
Abstract
The work aims to develop a polyvinyl alcohol-based water-soluble film with high mechanical properties and dissolution rate, providing a new packaging method for oral care products. Polyvinyl alcohol and maltodextrin were mixed in a certain proportion and added with polyethylene glycol as a plasticizer to prepare a series of water-soluble films by the coating method. The mechanical properties and dissolution performance of the water-soluble films were analyzed through single-factor and orthogonal experiments, and their application effect in packaging oral care products was verified. The orthogonal experiment results showed that the water-soluble film with a solute mass fraction of 0.18 g/mL, a solute ratio (polyvinyl alcohol:maltodextrin) of 3:1, and a volume ratio of plasticizer to solution of 0.009 mL/mL had the highest comprehensive score. The tensile strength and elongation at break were 42.06 MPa and 218.58%, respectively and the dissolution time was 41.57 s, which represented an increase of 3.78% and 41.78%, respectively, and a 49.54% reduction in dissolution time compared to those of pure polyvinyl alcohol films. After this water-soluble film was used to package the dry toothpaste and tooth powder and tested for dissolution effect, the tooth powder package showed excellent dissolution rate, and was completely dissolved and dispersed in water after 20 s. The dissolution rate of the toothpaste package was slower, and was completely dissolved after 60 s. The optimal group of water-soluble films obtained from the orthogonal experiment exhibits the best comprehensive mechanical and dissolution properties. Microscopic characterization reveals a dense surface structure, excellent compatibility among components, and a sound foundation for functionalization. Fourier transform infrared spectroscopy confirms that the stability of the system mainly stems from strong hydrogen-bonding interactions between components. Water contact angle measurements indicate that water-soluble films of different components exhibit consistent wetting behavior and favorable storage stability. In addition, the endothermic peaks of each component show slight differences in the thermal analysis curves, which, combined with the characteristic crystallinity of polyvinyl alcohol observed in the diffraction patterns, further verify the homogeneity of the system. In summary, this water-soluble film demonstrates promising application potential in the novel packaging field of oral care products.
关键词
聚乙烯醇 /
麦芽糊精 /
聚乙二醇 /
力学性能 /
溶解性能 /
口腔护理产品
Key words
polyvinyl alcohol /
maltodextrin /
polyethylene glycol /
mechanical property /
dissolution performance /
oral care product packaging
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