Investigation of mechanical, barrier, and antibacterial properties of PBST composites strengthened with KH-570 silane-coated MgO/Ag nanoparticles

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-11-25 DOI:10.1016/j.reactfunctpolym.2024.106112

Xiangliang Meng , Jie Zhang , Honghui Guo , Jian Gao , Wei Li , Yuling Wu , Hong Yan , BaoLong Niu

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引用次数: 0

Abstract

MgO/Ag nanoparticles (NPs) have been surface modified with the silane coupling agent KH-570. The modified NPs (KMA) were added to poly (butylene succinate-co-terephthalate) (PBST) to prepare the K-PMA composite films. The modification improved the compatibility between MgO/Ag NPs and PBST matrix. The study comprehensively investigated the effects of modified MgO/Ag NPs on the mechanical, antibacterial, and preservation properties of bio-nanocomposite films. The incorporation of NPs substantially improved the mechanical and barrier properties of the PBST matrix. The composite films exhibited the best overall performance when the nanoparticle content is 3 %. In particular, the elongation at break, tensile strength, and water vapor permeability (WVP) were 794.67 %, 32.20 MPa, and 1.53 × 10⁻¹¹ g·m/m²·s·Pa, respectively. Furthermore, the K-PMA-3 composite film exhibited excellent antibacterial properties and food preservation performance. The inhibition rates against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Salmonella paratyphi B (S. paratyphi B) were all over 98 %. After 6 days of preservation experiments, the mass loss of cherry tomatoes wrapped with K-PMA-3 film was only 5.9 %, which was only 45 % of the mass loss of cherry tomatoes wrapped with PMA-3 film. The results showed that the prepared biofilms have a great potential to be used as food packaging films.

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KH-570硅烷包覆MgO/Ag纳米颗粒增强PBST复合材料的力学、屏障和抗菌性能研究

用硅烷偶联剂KH-570对MgO/Ag纳米颗粒进行了表面改性。将改性后的NPs （KMA）加入到聚丁二甲酸丁二酯（PBST）中，制备K-PMA复合薄膜。改性提高了MgO/Ag纳米粒子与PBST基体的相容性。本研究全面考察了改性MgO/Ag NPs对生物纳米复合膜的力学、抗菌和保存性能的影响。NPs的加入大大改善了PBST基质的力学和屏障性能。当纳米颗粒含量为3%时，复合膜的综合性能最佳。断裂伸长率为794.67%，抗拉强度为32.20 MPa，水蒸气透气性为1.53 × 10−11 g·m/m2·s·Pa。此外，K-PMA-3复合膜具有优异的抗菌性能和食品保鲜性能。对金黄色葡萄球菌（S. aureus）、大肠杆菌（E. coli）和副伤寒沙门氏菌（S. paratyphi B）的抑制率均在98%以上。保鲜实验6 d后，K-PMA-3膜包裹的圣女果质量损失仅为5.9%，仅为PMA-3膜包裹的圣女果质量损失的45%。结果表明，所制备的生物膜具有很大的食品包装膜应用潜力。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.