紫外照射下聚己二酸/对苯二甲酸丁二醇酯/纳米复合膜的性能和纳米成分的迁移

doi:10.7506/spkx1002-6630-20211119-241

食品科学 ›› 2022, Vol. 43 ›› Issue (21): 265-274.doi: 10.7506/spkx1002-6630-20211119-241

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紫外照射下聚己二酸/对苯二甲酸丁二醇酯/纳米复合膜的性能和纳米成分的迁移

谭靓，胡长鹰，王志伟，李忠，张琼

（1.暨南大学包装工程学院，广东省普通高校产品包装与物流重点实验室，广东珠海 519070；2.暨南大学理工学院，广东广州 510632；3.拱北海关技术中心化学分析实验室，广东珠海 519015）

发布日期:2022-12-12
基金资助:
“十三五”国家重点研发计划项目（2018YFC1603205；2018YFC1603200）；广东省重点领域研发计划项目（2019B020212002）

Properties and Nanocomponent Migration of Poly (butyleneadipate-co-terephthalate) Nanocomposite Film under Ultraviolet Irradiation

TAN Liang, HU Changying, WANG Zhiwei, LI Zhong, ZHANG Qiong

(1. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, College of Packaging Engineering, Jinan University, Zhuhai 519070, China; 2. College of Science and Engineering, Jinan University, Guangzhou 510632, China; 3. Chemical Analysis Laboratory of Gongbei Customs Technology Center, Zhuhai 519015, China)

Published:2022-12-12

摘要/Abstract

摘要： 为探究紫外光（ultraviolet，UV）照射对聚己二酸/对苯二甲酸丁二酯（poly (butyleneadipate-co-terephthalate)，PBAT）的影响，本实验研究了PBAT/纳米ZnO和PBAT/纳米TiO2复合膜的性能及纳米成分在UV照射前后向3 g/100 mL乙酸溶液迁移的情况，并通过衰减全反射傅里叶变换红外光谱、场发射扫描电子显微镜、X射线衍射表征并分析变化原因。结果表明，未经UV照射时，两种纳米颗粒的加入对复合膜阻隔性的影响较小，纳米ZnO使复合膜的拉伸强度下降22.88%～40.99%，断裂伸长率下降至纯PBAT的86.07%～90.98%，最大迁移量为11.82 mg/kg。纳米TiO2的加入对复合膜的拉伸强度影响较小，断裂伸长率下降至纯PBAT的73.48%～87.18%，未检测到其迁出（方法检出限为0.009 mg/kg）。随UV照射时间延长，复合膜的断裂伸长率和拉伸强度均逐渐降低，但相同照射时间下，PBAT/纳米ZnO力学性能的下降程度低于纯PBAT和PBAT/纳米TiO2。在UV照射2 d后，复合膜的透氧系数显著增大（P＜0.05），透湿系数变化较小；纳米ZnO的最大迁移量为16.66 mg/kg，而仍未检测到纳米TiO2迁出；且复合膜酯键断裂，结晶度降低，表面变得粗糙，产生破裂的孔洞。综上，UV照射破坏了PBAT纳米复合膜的结构，使其性能降低，纳米ZnO可在一定程度上抑制复合膜力学性能的下降，但其迁移量会逐渐增加。

关键词: 聚己二酸/对苯二甲酸丁二醇酯；纳米氧化锌；纳米二氧化钛；紫外光；性能；迁移

Abstract: To investigate effect of ultraviolet (UV) irradiation on the properties of poly (butyleneadipate-co-terephthalate) (PBAT), the properties of PBAT/nano-ZnO and PBAT/nano-TiO2 composite films subjected and not subjected to UV irradiation, and the migration of nano-components from them to 3 g/100 mL acetic acid were studied. Meanwhile, the composite films were characterized by attenuated total reflection Fourier transformed infrared (ATR-FTIR) spectroscopy, field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). The results showed that the addition of each nanoparticle had little effect on the barrier performance of the composite film without UV irradiation. With the addition of nano-ZnO, the tensile strength of the composite film decreased by 22.88%-40.99%, the elongation at break decreased to 86.07%-90.98% of that of pure PBAT films, and the maximum migration of nano-ZnO was 11.82 mg/kg. The addition of nano-TiO2 had little effect on the tensile strength, but decreased the elongation at break to 73.48%-87.18% of that of pure PBAT films, and no migration of nano-TiO2 was observed (the detection limit of the method used was 0.009 mg/kg). With an increase in UV irradiation time, the elongation at break and tensile strength of the composite films decreased gradually, but the mechanical properties of the PBAT/nano-ZnO films decreased less than those of the pure PBAT and PBAT/nano-TiO2 films at the same irradiation time. After two days of UV irradiation, the oxygen permeability coefficient of the composite films increased significantly (P < 0.05), while the moisture permeability coefficient changed little. The maximum migration of nano-ZnO was 16.66 mg/kg, whereas no migration of nano-TiO2 was detected. The ester bond of the composite films was broken, the crystallinity reduced, and the surface became rough, with holes in it. We concluded that UV irradiation destroys the structure of PBAT composite film and degrades its properties. Nano ZnO can inhibit the decline of the mechanical properties of PBAT composite film to a certain extent, but its migration increases gradually.

Key words: poly (butyleneadipate-co-terephthalate); nano-ZnO; nano-TiO2; ultraviolet; property; migration

中图分类号:

TS206.4

谭靓，胡长鹰，王志伟，李忠，张琼. 紫外照射下聚己二酸/对苯二甲酸丁二醇酯/纳米复合膜的性能和纳米成分的迁移[J]. 食品科学, 2022, 43(21): 265-274.

TAN Liang, HU Changying, WANG Zhiwei, LI Zhong, ZHANG Qiong. Properties and Nanocomponent Migration of Poly (butyleneadipate-co-terephthalate) Nanocomposite Film under Ultraviolet Irradiation[J]. FOOD SCIENCE, 2022, 43(21): 265-274.

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紫外照射下聚己二酸/对苯二甲酸丁二醇酯/纳米复合膜的性能和纳米成分的迁移

Properties and Nanocomponent Migration of Poly (butyleneadipate-co-terephthalate) Nanocomposite Film under Ultraviolet Irradiation

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