The exploitation of natural fibers to reinforce polymers is a promising practice. Thus, biocomposites have gained increased attention in automotive, construction, and agricultural sectors, among others. present work reports the reinforcement recycled high-density polyethylene (r-HDPE) with hemp afford composite materials as sustainable analogues conventional wood/plastic (WPC) products. HDPE bo...

Biobased composites were successfully prepared using raw materials derived from biomass waste, i.e., an epoxy resin obtained cardanol and nanocellulose unbleached hemp fibers. The by solvent exchange impregnation of the cellulosic mat with resin, followed photocuring. Quantitative conversion was obtained, despite high amount fibers (30 wt%) their absorbance in UV region light spectrum. X-ray di...

The paper presents the study of polymer composites on epoxy resin matrix, polymerized in environment a constant magnetic field. contained admixtures various forms cellulose – microcrystalline and from waste hemp straw fibers an amount ranging 10 to 30 wt%. Changes mechanical properties due effect field with induction value B = 0.5 T. additionally particles form carbonyl iron,

Nowadays most plant textiles used for clothing and household are made of cotton and viscose. Before the 19th century however, plant textiles were mainly made from locally available raw materials, in Scandinavia these were: nettle, hemp and flax. It is generally believed that in Viking and early Middle Ages Scandinavia hemp was used only for coarse textiles (i.e. rope and sailcloth). Here we pre...

Commercially available snack bars and other foodstuffs prepared from pressed hemp seeds were ingested by volunteers. Urine specimens were collected for 24 h after ingestion of the foodstuffs containing hemp seeds and tested for marijuana using an EMIT immunoassay and gas chromatography-mass spectrometry (GC-MS). Specimens from individuals who ate one hemp seed bar demonstrated little marijuana ...

The effect of chemical treatment of hemp hurds slices in three solutions (EDTA (Ethylenediaminetetraacetic acid), NaOH and Ca(OH)₂) on the properties of natural material was discussed in this paper. Changes in the morphology, chemical composition and structure as well as thermal stability of hemp hurds before and after their modification were investigated by using FTIR (Fourier transform infrar...

Unwanted sound reflection can create acoustic discomfort and lead to problems of speech comprehensibility. Contemporary building techniques enable highly finished internal walls resulting in sound reflective surfaces. In contrast, sustainable construction materials using natural and vegetal materials, are often more porous and absorptive. Hemp shiv is used as an aggregate and when mixed with li...

Abstract There is a rising demand for advanced new materials in food packaging to meet the growing economic and sustainability requirements. Natural fibers have excellent mechanical thermal isolation properties lower production costs than synthetic fibers, making them suitable candidates development of sustainable packaging. Other characteristics natural i.e., low cost, easy availability, impac...