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Related Concept Videos

Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

282
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
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Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention

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Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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Plasticizers01:31

Plasticizers

272
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.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
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Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
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Chitosan Composites in Packaging Industry-Current Trends and Future Challenges.

Victor G L Souza1, João R A Pires1, Carolina Rodrigues1

  • 1MEtRICs, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal.

Polymers
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Summary

Chitosan composites offer sustainable food packaging alternatives but face challenges in cost and performance compared to plastics. Research trends and future challenges in their production and application are explored.

Keywords:
chitosancompositesfood packagingthermoplastic chitosan films

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Area of Science:

  • Materials Science
  • Polymer Science
  • Food Science

Background:

  • Chitosan-based composites are utilized in food packaging as films and edible coatings.
  • Their large-scale adoption is hindered by high costs and inferior barrier, thermal, and mechanical properties compared to petroleum-based plastics.
  • Emerging strategies aim to enhance chitosan composite performance for packaging applications.

Purpose of the Study:

  • To review current trends in chitosan composite development for food packaging.
  • To identify future challenges in the production and application of these materials.
  • To provide insights into advancing chitosan-based food packaging solutions.

Main Methods:

  • Literature review of recent advancements in chitosan composite materials.
  • Analysis of performance metrics (barrier, thermal, mechanical) of chitosan composites.
  • Identification of research gaps and future directions in the field.

Main Results:

  • Chitosan composites show promise but require further optimization to match conventional plastics.
  • Various modification strategies are being investigated to improve properties.
  • Cost-effectiveness and scalability remain significant hurdles.

Conclusions:

  • Chitosan composites are a viable sustainable alternative for food packaging.
  • Overcoming cost and performance limitations is crucial for widespread industrial implementation.
  • Continued research is essential to unlock the full potential of chitosan in food packaging.