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Innovative Hemp Shive-Based Bio-Composites, Part II: The Effect of the Phase Change Material (PCM) Additive on Characteristics of Modified Potato Starch Binders

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Publicado en:Materials vol. 18, no. 4 (2025), p. 891
Autor principal: Vitola, Laura
Otros Autores: Pundiene, Ina, Pranckevičienė, Jolanta, Bajare, Diana
Publicado:
MDPI AG
Materias:
Latvia
Microstructural analysis
Hemp
Thermal energy
Adhesives
Mechanical properties
Bulk density
Storage capacity
Phase change materials
Heat conductivity
Potatoes
Energy consumption
Composite materials
Construction
Raw materials
Thermal analysis
Glycerol
Cooling
Spectrum analysis
Fourier transforms
Sodium
Building materials
Workability
Compressive strength
Dimensional stability
Thermal storage
Acceso en línea:Citation/Abstract
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Resumen:This study investigates the effect of phase change materials (PCM) on the properties of modified potato starch binders and hemp shive-based bio-composites, emphasizing their potential for sustainable construction applications. PCM-modified binders have shown reduced viscosity during gelatinization, enhancing their workability and uniformity during processing. A microstructural analysis reveals that PCM addition results in a denser and more cohesive binder network, leading to improved adhesion and reduced porosity. A thermal analysis demonstrates a shift to higher decomposition temperatures and a linear increase in specific heat capacity within the PCM phase-change range (20–30 °C), significantly enhancing the thermal storage capacity of the bio-composites. PCM addition improves compressive strength by up to twice, with optimal performance achieved at 8% PCM additive content. The prolonged cooling time, up to three times longer in bio-composites with PCM additive, highlights their effectiveness in thermal regulation. Additionally, bio-composites with a PCM additive exhibits increased bulk density and reduced water swelling, improving dimensional stability. These findings underline the dual benefits of enhanced thermal and mechanical performance in bio-composites with a PCM additive, making them a viable alternative to conventional building materials.
ISSN:1996-1944
DOI:10.3390/ma18040891
Fuente:Materials Science Database