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Identification of biodegradable plastics using differential scanning calorimetry and carbon composition with chemometrics

文献类型： 外文期刊

作者： Zhang, Menglin 1 ; Zhang, Yongzhi 1 ; Li, Chunlin 1 ; Jing, Nie 1 ; Shao, Shengzhi 1 ; Wang, Fang 1 ; Mei, Hanyi 1 ; Rogers, Karyne M. 1 ; Kong, Xiangdong 1 ; Yuan, Yuwei 1 ;

作者机构： 1.Zhejiang Sci Tech Univ, Inst Smart Biomat, Sch Mat Sci & Engn, Hangzhou 310018, Zhejiang, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, Hangzhou 310021, Peoples R China

3.Minist Agr & Rural Affairs China, Key Lab Informat Traceabil Agr Prod, Hangzhou 310021, Peoples R China

4.Zhejiang Sci Tech Univ, Zhejiang Mauritius Joint Res Ctr Biomat & Tissue E, Hangzhou 310018, Zhejiang, Peoples R China

5.GNS Sci, Natl Isotope Ctr, Lower Hutt 5040, New Zealand

6.198 Shiqiao Rd, Hangzhou 310021, Zhejiang, Peoples R China

期刊名称：JOURNAL OF HAZARDOUS MATERIALS ADVANCES

ISSN： 2772-4166

年卷期： 2023 年 10 卷

页码：

收录情况： SCI

摘要： Biodegradable plastics have become an important commodity to replace non-degradable plastics and alleviate environment pollution. It is important to identify instances of counterfeit and mislabeled biodegradable plastics in the marketplace to avoid sustainability fraud and improve plastics waste recycling. In this study, differential scanning calorimetry (DSC) and elemental analyzer-isotope ratio mass spectrometry (EA-IRMS) were used to analyze biodegradable plastics (polylactic acid (PLA), poly butylene adipate-co-terephthalate (PBAT), PBAT/PLA blend (PBAT +PLA)) and non-degradable plastics (polyethylene terephthalate (PET), high density polyethylene (HDPE), low density polyethylene (LDPE), polypropylene (PP)). A verification model was built using orthogonal partial least squares-discriminant analysis (OPLS-DA). Results showed that the melting point of biodegradable and non-degradable plastics ranged from 120 & DEG;C to 176 & DEG;C and 105 & DEG;C to 253 & DEG;C, respectively. The melting points of biodegradable PLA and non-degradable PP overlapped. The 613 C values of biodegradable and non-degradable plastics ranged from-25.8 %o to-11.6 %o and-32.3 %o to-25.4 %o , respectively. The % C of biodegradable and non-degradable plastics ranged from 36.0% to 61.0% and 56.4% to 85.3%, respectively. Three OPLS-DA models were established by combining DSC variables, 613 C values and % C. The PLA discriminant accuracy of these models was 100%, suggesting this approach holds promise for the regulation and identification of biodegradable plastics in the marketplace.

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