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Automated Counterflow Centrifugal System for Small-Scale Cell Processing
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Centrifugally Spun Recycled PET: Processing and Characterization.

Phu Phong Vo1,2, Hoan Ngoc Doan3, Kenji Kinashi4

  • 1Internship Student, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan. 1770195@hcmut.edu.vn.

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|April 11, 2019
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Summary

Centrifugal spinning effectively transforms recycled poly(ethylene terephthalate) (rPET) into high-value fibers. This study optimized parameters to produce submicron rPET fibers with good mechanical properties, demonstrating a sustainable manufacturing approach.

Keywords:
centrifugal spinningfibersforcespinningpoly(ethylene terephthalate)recycled

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Area of Science:

  • Materials Science
  • Polymer Science
  • Sustainable Manufacturing

Background:

  • Recycling poly(ethylene terephthalate) (rPET) is crucial for sustainability.
  • Developing high-value products from rPET requires efficient fabrication techniques.
  • Centrifugal spinning offers high productivity for fiber production.

Purpose of the Study:

  • To fabricate submicron and micrometer-scale fibers from recycled poly(ethylene terephthalate) (rPET) using centrifugal spinning.
  • To investigate the influence of process parameters on fiber morphology and mechanical properties.
  • To assess the potential of centrifugal spinning for creating value-added rPET products.

Main Methods:

  • Solution spinning of rPET in a dichloromethane and trifluoroacetic acid mixture.
  • Utilizing centrifugal spinning with varying polymer concentrations, rotational speeds, and needle diameters.
  • Characterization using scanning electron microscopy (SEM) for morphology and tensile testing for mechanical properties.
  • Differential scanning calorimetry (DSC) for thermal behavior analysis.

Main Results:

  • Optimized conditions (10 wt% rPET, 15,000 rpm, 160 μm needle) yielded the smallest fibers (average diameter 619 nm).
  • Fabricated fibrous mats exhibited an average tensile strength of 4.3 MPa and modulus of 34.4 MPa.
  • Demonstrated control over fiber diameter and morphology through process parameter adjustments.

Conclusions:

  • Centrifugal spinning is a viable and productive method for producing submicron fibers from rPET.
  • The process allows for the creation of value-added materials from recycled plastics.
  • Optimized centrifugal spinning can yield rPET fibers with desirable mechanical characteristics for various applications.