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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
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Related Experiment Video

Updated: Jan 11, 2026

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy
05:05

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Published on: June 6, 2025

703

Feasibility Study on Quantification of Biodegradable Polyester Microplastics Based on Intrinsic Fluorescence.

Tian-Chao Shi1,2, Ze-Yang Zhang2, Xiao-Han Zhou1,2

  • 1College of Materials Engineering, North China Institute of Aerospace Engineering, Langfang 065000, China.

Polymers
|November 13, 2025
PubMed
Summary

Biodegradable microplastics (BMPs) pose ecological risks. This study uses intrinsic fluorescence for rapid, label-free quantification of BMPs, offering a simple method for environmental monitoring.

Keywords:
PBATbiodegradable microplasticsfluorescence quantificationrapid detectionvisualization

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Polymer Science

Background:

  • Biodegradable plastics can fragment into microplastics, posing environmental risks.
  • Efficient quantification methods for biodegradable microplastics (BMPs) are crucial for assessing ecological impact.

Purpose of the Study:

  • To develop a label-free quantification method for BMPs using their intrinsic fluorescence.
  • To investigate the relationship between fluorescence intensity and BMP concentration, size, and shape.

Main Methods:

  • Utilized intrinsic fluorescence spectroscopy of biodegradable polyesters (PLA, PHB, PBS, PBAT, PCL).
  • Investigated fluorescence emission originating from molecular functional groups and aggregated conjugated groups.
  • Established linear models correlating PBAT mass concentration (100-500 mg/L) with fluorescence intensity at 436 nm and 465 nm under 380 nm excitation.

Main Results:

  • Biodegradable microplastics exhibit characteristic fluorescence emissions.
  • Fluorescence intensity is dependent on BMP size and shape.
  • Achieved high correlation coefficients (R² = 0.877 and 0.963) for linear models of BMP quantification.
  • The intrinsic fluorescence method showed comparable accuracy to fluorescence labeling but with simpler operation.

Conclusions:

  • Intrinsic fluorescence offers a viable, label-free method for quantifying biodegradable microplastics.
  • The developed method is simple and rapid, suitable for pre-isolated and purified microplastics.
  • This approach aids in monitoring BMPs and understanding their environmental risks.