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Related Concept Videos

Bioplastics01:27

Bioplastics

52
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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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...
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Related Experiment Video

Updated: Apr 18, 2026

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Robust and biodegradable elastomers based on corn starch and polydimethylsiloxane (PDMS).

Luca Ceseracciu1, José Alejandro Heredia-Guerrero, Silvia Dante

  • 1Smart Materials and ‡Nanophysics, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy.

ACS Applied Materials & Interfaces
|January 27, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a new biodegradable elastomer made with over 80% corn starch and a silicone polymer. These robust, hydrophobic bioelastomers offer tunable mechanical properties and potential as green substitutes for plastics.

Keywords:
biodegradable elastomerbiopolymerpolydimethylsiloxanestarch

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Biotechnology

Background:

  • Designing starch-based biopolymers with durable mechanical properties and water resistance remains challenging.
  • Thermoplastic starch exhibits poor dimensional stability, limiting its applications.
  • Unmodified starch granules show poor compatibility and dispersion in other thermoplastics above 5% concentration.

Purpose of the Study:

  • To develop a facile method for preparing biodegradable elastomers with high starch content.
  • To create mechanically robust and hydrophobic bioelastomers using unmodified corn starch and acetoxy-polyorganosiloxane.
  • To explore the potential of these bioelastomers as green substitutes for conventional materials.

Main Methods:

  • Incorporating large amounts (over 80% by volume) of unmodified corn starch into acetoxy-polyorganosiloxane thermosets.
  • Utilizing the naturally adsorbed moisture on starch for autocatalytic hydrolysis of polyorganosiloxane to form Si-O-Si networks.
  • Tuning mechanical properties by varying starch granule content.

Main Results:

  • Mechanically robust, hydrophobic bioelastomers were successfully produced.
  • Mechanical properties were tunable with high elastic recovery rates.
  • Starch granules reduced the surface friction coefficient and water uptake capacity.
  • Bioelastomers exhibited lower strain energy dissipation factors than conventional rubbers.
  • Developed bioelastomers are biocompatible and estimated to biodegrade in Mediterranean seawater within 3–6 years.

Conclusions:

  • A facile method for preparing high-starch content biodegradable elastomers was established.
  • The developed bioelastomers demonstrate promising mechanical properties, hydrophobicity, and low friction.
  • These materials are suitable for applications requiring mechanical energy dampening and are eco-friendly alternatives.