改进制备工艺，提高肉桂精油在热塑性淀粉/PBAT活性膜中的保持性和抗菌活性

IF 6.2 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2025-04-21 DOI:10.1016/j.indcrop.2025.120990

Chenwei Chen, Lili He, Yifan Tian, Jing Xie

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引用次数: 0

摘要

采用挤压造粒和挤压铸造工艺制备了热塑性淀粉/聚己二酸丁烯-对苯二甲酸酯（TPS/PBAT）抗菌活性膜。在挤出造粒阶段，通过四种不同的工艺引入CEO: (1) CEO与TPS和PBAT共混（标记为P/T-C-1薄膜），(2)CEO与淀粉共混（标记为P/T-C-2薄膜），(3)CEO与TPS共混（标记为P/T-C-3薄膜），(4)CEO与PBAT共混（标记为P/T-C-4薄膜）。研究了不同工艺对膜的物理、结构、力学性能、CEO保留率、释放性能和抗菌性能的影响。各膜的水蒸气透性和透氧性无显著差异。在这四种薄膜中，P/T-C-2薄膜中CEO与TPS/PBAT基体通过氢键相互作用最强，CEO在薄膜中的分散效果最好。P/T-C-2膜的CEO滞留量最高，P/T-C-1膜次之，P/T-C-3膜次之，P/T-C-4膜次之。P/T-C-2膜对食品模拟剂（10 %乙醇）的CEO释放量最高，对大肠杆菌、金黄色葡萄球菌和腐臭葡萄球菌的抑菌活性最强。P/T-C-3薄膜的机械强度和柔韧性最差。研究结果表明，在挤出造粒阶段将CEO与淀粉共混，可以提高CEO在TPS/PBAT活性膜中的保留率和膜的抗菌活性。为优化熔融挤出制备TPS/PBAT活性膜的工艺提供了一种替代方案。

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Improving the preparation process to enhance the retention of cinnamon essential oil in thermoplastic starch/PBAT active film and its antimicrobial activity

The thermoplastic starch/poly(butylene adipate-co-terephthalate) (TPS/PBAT) antibacterial active films incorporated with cinnamon essential oil (CEO) were fabricated through extrusion granulation and extrusion casting processes. CEO was introduced at extrusion granulation stage through four different processes: (1) blending CEO with TPS and PBAT (marked as P/T-C-1 film), (2) blending CEO with starch (marked as P/T-C-2 film), (3) blending CEO with TPS (marked as P/T-C-3 film), and (4) blending CEO with PBAT (marked as P/T-C-4 film). The effects of these different processes on the films’ properties were studied, including the physical, structure, mechanical property, retention content of CEO, release behavior and antibacterial activity. All films displayed no significant difference in water vapor and oxygen permeability. Among these four films, the P/T-C-2 film showed the strongest interactions between CEO and TPS/PBAT matrix through hydrogen bonding and the best dispersion of CEO in the film. The P/T-C-2 film exhibited the highest retention content of CEO, followed by P/T-C-1 film, P/T-C-3 film and P/T-C-4 film. The P/T-C-2 film showed the highest release of CEO into the food simulant (10 % ethanol) and the strongest antibacterial activity against E.coli, S. aureus and S. putrefaciens. The P/T-C-3 film possessed poorest mechanical strength and flexibility. This work indicated that the process of blending CEO with starch at extrusion granulation stage enhanced the retention of CEO in TPS/PBAT active film and the antibacterial activity of film. It provided an alternative solution for optimizing the preparation process of TPS/PBAT active films through melt extrusion.

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.