3 种工况下PBAT/PLA材料中抗氧剂168及其降解产物的迁移

doi:10.7506/spkx1002-6630-20211114-163

食品科学 ›› 2022, Vol. 43 ›› Issue (18): 299-309.doi: 10.7506/spkx1002-6630-20211114-163

• 安全检测 • 上一篇

3 种工况下PBAT/PLA材料中抗氧剂168及其降解产物的迁移

葛梦晗，胡长鹰，王志伟

（1.广东普通高校产品包装与物流重点实验室，暨南大学包装工程学院，广东珠海 519070；2.暨南大学食品科学与工程系，广东广州 510632）

发布日期:2022-09-28
基金资助:
“十三五”国家重点研发计划重点专项（2018YFC1603205；2018YFC1603200）；广东省重点领域研发计划项目（2019B020212002）

Migration of Irgafos168 and Its Degradation Products from Poly(butyleneadipate-co-terephthalate)/Polylactic Acid Composite Materials under Three Working Conditions

GE Menghan, HU Changying, WANG Zhiwei

(1. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, College of Packaging Engineering, Jinan University, Zhuhai 519070, China; 2. Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China)

Published:2022-09-28

摘要/Abstract

摘要： 采用气相色谱-质谱法研究抗氧剂168及其降解产物从不同工况（紫外、高湿、盐雾）处理下的聚己二酸-对苯二甲酸丁二醇酯/聚乳酸（poly(butyleneadipate-co-terephthalate)/polylactic acid，PBAT/PLA）复合膜中向脂肪类食品模拟物异辛烷的迁移规律，并对每个工况下复合膜的老化程度进行力学性能以及红外光谱表征。结果表明：紫外、高湿工况对PBAT/PLA复合膜降解影响较大。紫外2 d、高湿60 d、盐雾40 d后复合膜的拉伸强度在10、15、17 MPa左右，分别下降了61.1%、41.6%、35.9%，断裂伸长率分别下降了93.5%、34.1%、21.5%。抗氧剂质量分数对复合膜性能影响不显著（P＞0.05）。物质迁移量与其在迁移实验前复合膜中的含量呈正相关。未处理的复合膜中抗氧剂168迁移量最高，为85.39 mg/kg。随着复合膜老化抗氧剂降解产物的含量增加，主要产物为三(2,4-二叔丁基苯基)磷酸酯，紫外工况下产生最多，迁移量为3.04～99.50 mg/kg。物质的迁出率受温度、含量以及复合膜老化程度三者同时影响。

关键词: 聚己二酸-对苯二甲酸丁二醇酯/聚乳酸；抗氧剂；降解产物；迁移

Abstract: The migration of the antioxidant Irgafos168 and its degradation products from poly(butyleneadipate-co-terephthalate)/polylactic acid (PBAT/PLA) composite films into the fatty food simulant isooctane under different working conditions (ultraviolet (UV), high humidity and salt atmosphere) was studied by gas chromatography-mass spectroscopy (GC-MS), and the aging degree of composite films under each condition was investigated in terms of their mechanical properties and infrared characteristics. The results showed that the degradation of PBAT/PLA composite films was greatly affected by UV and high humidity conditions. After two days of UV exposure, 60 days of high humidity exposure and 40 days of salt spray exposure, the tensile strength of the composite films decreased by 61.1%, 41.6% and 35.9% to 10, 15 and 17 MPa, respectively, and the elongation at break decreased by 93.5%, 34.1% and 21.5%, respectively. The antioxidant’s concentration had no significant effect on the properties of the composite films (P > 0.05). The migration of Irgafos168 and its degradation products was positively correlated with their initial levels in the composite films. The migration of Irgafos168 from the untreated composite film was the highest (85.39 mg/kg). The content of Irgafos168’s degradation products in the composite films increased with aging, the major one being tri(2,4-di-tert-butylphenyl) phosphate, which was produced in the largest amounts under UV conditions, and the migration of tri(2,4-di-tert-butylphenyl) phosphate was 3.04-99.50 mg/kg. The migration of the substances could be affected by temperature, their initial contents and the aging degree of the composite films.

Key words: poly(butyleneadipate-co-terephthalate)/polylactic acid; antioxidants; degradation products; migration

中图分类号:

TS206.4

葛梦晗，胡长鹰，王志伟. 3 种工况下PBAT/PLA材料中抗氧剂168及其降解产物的迁移[J]. 食品科学, 2022, 43(18): 299-309.

GE Menghan, HU Changying, WANG Zhiwei. Migration of Irgafos168 and Its Degradation Products from Poly(butyleneadipate-co-terephthalate)/Polylactic Acid Composite Materials under Three Working Conditions[J]. FOOD SCIENCE, 2022, 43(18): 299-309.

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3 种工况下PBAT/PLA材料中抗氧剂168及其降解产物的迁移

Migration of Irgafos168 and Its Degradation Products from Poly(butyleneadipate-co-terephthalate)/Polylactic Acid Composite Materials under Three Working Conditions

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