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Related Concept Videos

Bioplastics01:27

Bioplastics

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Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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Updated: May 1, 2026

Preparation of Carbon Fiber and Bamboo Fiber Reinforced Poly (butylene Adipate-co-terephthalate) Foams by Supercritical Carbon Dioxide Foaming
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Bionic Engineering Strategy for Preparing Flexible Carbon Paper From Waste Polypropylene: Excellent Electromagnetic

Minghang Yang1,2,3,4, Shuaining Zhou1,2,3,4, Yu Deng1,2,3,4

  • 1State Key Laboratory of Fine Chemicals, Frontier Science Center For Smart Materials-Oriented Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|April 30, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a flexible carbon paper using recycled materials for effective electromagnetic interference (EMI) shielding. This material offers excellent conductivity and shielding, suitable for wearable electronics.

Keywords:
carbon paperelectromagnetic interference shieldingrecycled polypropylenewaste pre‐oxidized fibers

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Sustainable Chemistry

Background:

  • Flexible paper-based carbon materials are crucial for electromagnetic interference (EMI) shielding applications.
  • Developing cost-effective and high-performance EMI shielding materials from recycled resources is a significant challenge.

Purpose of the Study:

  • To create an economical and multifunctional polypropylene-based flexible carbon paper (PP-CP) using recycled polypropylene (rPP) and waste pre-oxidized fibers.
  • To investigate the structure-property relationships for advanced EMI shielding and other functionalities.

Main Methods:

  • Preparation of PP-CP via a liquid phase sulfonation process, utilizing the "heterogeneous swelling" effect of the PP matrix.
  • Construction of an interpenetrating network structure from PP-derived carbon and short-cut carbon fibers (SCF).
  • Characterization of the material's electrical conductivity, EMI shielding effectiveness (EMI SE), joule heating, hydrophobicity, and breathability.

Main Results:

  • A synergistic 3D conductive network was formed by SCF and PP-derived microcracks, achieving high electrical conductivity (7735 S m⁻¹).
  • The PP-CP exhibited a maximum EMI shielding effectiveness of 58.8 dB and a specific SE (SSE/t) of 6642 dB·cm²/g in the X-band.
  • The material demonstrated excellent joule heating, hydrophobicity, and breathability.

Conclusions:

  • The developed PP-CP offers superior multifunctional integration, meeting the demands of next-generation wearable electronic devices.
  • This study presents a sustainable approach for utilizing PP and carbon fiber waste, paving the way for resource circularity.