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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.
Details
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
; Pundiene, Ina 2
; Pranckevičienė, Jolanta 2
; Bajare, Diana 1
1 Institute of Sustainable Building Materials and Engineering Systems, Riga Technical University, Kipsalas 6A, LV–1048 Riga, Latvia
2 Laboratory of Concrete Technologies, Institute of Building Materials, Vilnius Gediminas Technical University, Sauletekio al. 11, LT–10223 Vilnius, Lithuania