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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
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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.
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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Film Extrusion of Crambe abyssinica/Wheat Gluten Blends
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Enhancing Starch-Based Packaging Materials: Optimization of Plasticizers and Process Parameters.

Yue Wu1, Rongji Tang1, Anfu Guo1

  • 1School of Mechanical and Automotive Engineering, Liaocheng University, Liaocheng 252000, China.

Materials (Basel, Switzerland)
|September 9, 2023
PubMed
Summary
This summary is machine-generated.

Developing eco-friendly starch-based packaging requires optimizing composite plasticizers and processing. This study enhanced mechanical properties by reducing starch crystallinity, yielding stronger, more resilient materials for green production.

Keywords:
Box–Behnken designplasticizer optimizationresponse surface methodstarch−based composite packaging materialthermoplastic starch

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Area of Science:

  • Materials Science
  • Polymer Science
  • Green Chemistry

Background:

  • Traditional plastic packaging poses environmental concerns, necessitating biodegradable alternatives.
  • Starch-based materials offer a sustainable solution but face challenges with mechanical strength due to high starch crystallinity and poor fiber compatibility.

Purpose of the Study:

  • To enhance the mechanical properties of starch-based packaging materials.
  • To optimize the use of composite plasticizers and process parameters for improved performance.

Main Methods:

  • Utilized a composite plasticizer (glycerol and D-fructose) to disrupt starch hydrogen bonding and reduce crystallinity.
  • Employed Response Surface Methodology (RSM) to optimize forming temperature, time, and AC content.
  • Characterized material structure using Scanning Electron Microscopy (SEM) and X-ray Crystallography.
  • Analyzed chemical interactions with Fourier Transform Infrared Spectroscopy (FTIR).

Main Results:

  • Composite plasticizers effectively reduced starch crystallinity and altered granule morphology.
  • Glycerol and D-fructose formed new hydrogen bonds with starch, enhancing the plasticizing effect.
  • Optimized RSM parameters (198 °C, 5.4 min, 0.84 g AC) significantly improved material properties.
  • Achieved a 12.2% increase in tensile strength and an 8.1% increase in rebound rate compared to non-optimized materials.

Conclusions:

  • Optimized composite plasticizers and process parameters are crucial for enhancing the mechanical properties of starch-based packaging.
  • This approach offers a viable method for producing high-performance, environmentally friendly packaging materials.
  • The study demonstrates a successful strategy for overcoming limitations in biodegradable starch-based materials.