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Twin-Screw Extrusion Process to Produce Renewable Fiberboards

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CaCO₃ blowing agent mixing method for biomass composites improved buffer packaging performance.

Kai-Qiang Sun^1,2, Fang-Yi Li^1,2, Jian-Yong Li^1,2

¹Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University Jinan 250061 China lifangyi@sdu.edu.cn.

|April 15, 2022

Summary

Calcium carbonate (CaCO3) as a nucleating agent creates uniform, biodegradable composite foams for packaging. Optimal performance was achieved at 5 wt% CaCO3, enhancing cushioning and thermal stability.

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Preparation of Biopolymer Aerogels Using Green Solvents

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Published on: July 4, 2016

Area of Science:

Materials Science
Polymer Science
Sustainable Materials

Background:

Petroleum-based packaging materials pose environmental concerns.
Development of biodegradable alternatives is crucial for sustainable packaging solutions.
Achieving uniform foam structures in biodegradable composites presents a challenge.

Purpose of the Study:

To develop biodegradable composites with an open-cell structure as replacements for petroleum-based packaging.
To investigate the effect of calcium carbonate (CaCO3) as a nucleating agent on composite foam properties.
To optimize the CaCO3 content for enhanced cushioning and material stability.

Main Methods:

Preparation of biodegradable composites using CaCO3 as a nucleating agent.
Characterization of composite cell structure, density, and cushioning performance.
Evaluation of thermal stability and moisture absorption properties.
X-ray diffraction (XRD) analysis to determine changes in material crystallinity.

Main Results:

Addition of 5 wt% CaCO3 resulted in uniform and dense composite cells with improved cushioning.
Higher CaCO3 content led to decreased cell density and cushioning properties.
CaCO3 enhanced thermal stability and water barrier properties, reducing moisture absorption by 15%.
XRD analysis confirmed that CaCO3 disrupted starch crystallinity, promoting homogeneous slurry formation and uniform foaming.

Conclusions:

CaCO3 effectively acts as a nucleating agent to produce uniform biodegradable composite foams.
Optimizing CaCO3 content is critical for achieving desired cushioning and material properties.
These biodegradable composites offer a sustainable alternative to petroleum-based packaging with improved performance characteristics.