The present study focuses on the fabrication and analysis of thermal and dynamic mechanical properties of epoxy bio-composites reinforced with 15 wt.% sisal fibers and varying carbon nanotube (CNT) content (0–2.0 wt.%). As per the results, incorporation of 1.0 wt.% CNT significantly enhances thermal and mechanical properties of the composite. Compared to the baseline composite without CNTs, thermal degradation onset has been improved by approximately 13%, while crystallinity and thermal resilience also increased. The storage modulus and loss modulus rose by approximately 79% and 197% respectively, indicating greater stiffness and energy absorption capacity. The damping factor (tan δ) decreased by over 56%, implying enhanced load-bearing capability with reduced energy dissipation. These improvements are attributed to better interfacial bonding and uniform CNT dispersion at 1.0 wt.%. The SEM analysis of epoxy bio-composites also revealed that the optimal dispersion and strong interfacial bonding are achieved at 1.0 wt.% CNT. Overall, the findings demonstrate that optimal thermal stability and viscoelastic properties occur at low CNT content in natural fiber composites, making them suitable for advanced structural applications in automotive, aerospace, and packaging sectors.

The present study investigated the thermal and dynamic mechanical properties of epoxy polymer bio-composites reinforced with 15 wt.% sisal fiber and varying concentrations (0, 0.5, 1.0, 1.5, and 2.0 wt.%) of carbon nanotube (CNT) additives. Thermogravimetric Analysis (TGA) revealed that the composite with 1.0 wt.% CNT exhibited the highest thermal stability, with minimal weight loss across a temperature range of 30°C – 790°C. Differential Scanning Calorimetry (DSC) results indicated enhanced crystallinity and thermal resilience in the 1.0 wt.% CNT formulation. Dy-namic Mechanical Analysis (DMA) indicated that the proposed composite has the highest storage modulus of 3859.28 MPa, loss modulus of 539.44 MPa, and a glass tran-sition temperature of 89.26°C. It also has the lowest damping factor (tan δ = 0.25), de-noting superior stiffness and reduced energy dissipation. The reported results highlight the optimal reinforcement effect of 1.0 wt.% CNT, improving thermal stability, mechanical performance, and interfacial bonding in sisal fiber-reinforced epoxy composites for advanced industrial applications.

Dehumidification systems based on liquid desiccant have the potential to lower the latent cooling load of traditional vapour-compression airconditioning, especially in humid climates. This paper presents an experimental research on a liquid desiccant dehumidification system using calcium chloride that was run under controlled winter conditions. The effects of inlet air velocity and regeneration temperature on the outlet air relative humidity are evaluated. The results indicate that lower air velocities improve moisture removal because of increased air–desiccant contact time. The regeneration at about 58 C gave a relatively stable regeneration behaviour with a small range of outlet air relative humidity under the conditions of the experiment. The work gives experimentally determined operating trends applicable to real-world humidity-control applications and low-grade heat regeneration, and observes that the results are not to establish universal performance standards but to assist in optimising systems.