Hybrid organic aerogels consisting of polyvinyl alcohol (PVA), cellulose nanofibrils (CNFs), and graphene oxide nanosheets (GONSs) were prepared using an environmentally friendly freeze-drying process. The material properties of these fabricated aerogels were measured and analyzed using various characterization techniques including compression testing, scanning electron microscopy, thermogravim...

Boron nitride nanotubes (BNNTs) have been increasingly investigated for use in a wide range of applications due to their unique physicochemical properties including high hydrophobicity, heat and electrical insulation, resistance to oxidation, and hydrogen storage capacity. They are also valued for their possible medical and biomedical applications including drug delivery, use in biomaterials, a...

Asynchronous motors are used in many agricultural industries. Agricultural production is a with high humidity. As noted above, one of the main reasons for failure electric installations during prolonged downtime insulation breakdown due to its dampness. Moistening winding will degrade dielectric performance insulation. If motor often switched on and total operating time per day at least 4 - 6 h...

Abstract At present buildings contribute a third of total greenhouse gas emissions. There is need for sustainable solutions and natural materials, which offer low-embodied energy their low impact has promising potential as construction alternatives. Hempcrete lightweight insulation material, provides natural, airtight, vapor-permeable insulation. Straw panels are also materials they consist ext...

Selected applications of fiber-reinforced polymer (FRP) sandwich structural elements in building and bridge construction are discussed. It is shown how in building construction this technology enables the integration of functions such as load-bearing capacity, thermal insulation, daylight entry and energy production, into single, large-scale and lightweight roof or façade panels. In bridge cons...

The human thermal comfort is the state of mind, which affected not only by physical and body’s internal physiological phenomena but also clothing properties such as resistance clothing, insulation, area factor, air relative humidity. In this work, we extend one-dimensional Pennes’ bioheat transfer equation adding protective layer. transient temperature profile with layer at different time steps...