All Natural High-Density Fiber- and Particleboards from Hemp Fibers or Rice Husk Particles

Abstract

In the present study, long hemp fibers and rice husk particles have been used for producing all natural-based boards for building, automotive and in-door furniture, employing a simple and economic transformation process (namely, compression molding). In order to have the required consistence and mechanical strength, cornstarch was employed as binder. By this way, fiber-and particleboards have been prepared and characterized in terms of morphology, mechanical properties (flexural modulus and strength). The influence of different relative humidity levels on composite storage modulus and heat deflection temperatures has been investigated, as well. Long fibers turned out to be capable of sustaining approximately three times the load with respect to particles in standard conditions. Thermal, hygro-and photo stability of the above materials have been investigated under three ageing conditions: namely, i) high temperature (thermal ageing), ii) humidity plus high temperature (hygro-thermal ageing) and iii) UV radiations (photo ageing). Regardless of the experimental ageing conditions adopted, fiberboards have shown good mechanical stability with a modest decrease of storage modulus (< 20%) with respect to the values before exposure.

Biodegradable Cassava Starch Based Foams Using Rice Husk Waste as Macro Filler

“…The recovery of this waste material would improve the sustainability of this agricultural activity and help to reduce the environmental impact of other means of disposing of it. So far rice husk has been recycled only for low-value applications, some studies have described the incorporation of rice husk in thermal insulation material [19,20], lightweight concrete [21], composite with cork and rubber [22], and starch [23]. The rice husk was also added in plastic composites with low density polyethylene (LDPE) [24], high density polyethylene (HDPE) [25] polylactic acid (PLA) [26] polypropylene (PP) [27] and polyvinyl chloride (PVC) [28].…”

Hemp hurd and alfalfa as particle filler to improve the thermo‐mechanical and fire retardant properties of poly(3‐hydroxybutyrate‐co‐3‐hydroxyhexanoate)

“…One of the established markets for composites with natural fillers is their molding into panels for automotive interior applications such as door panels/inserts, trunk liners, spare wheel covers, parcel trays, headliners, columns, and much more or partial replacement of wooden part in furniture . Several researchers have worked with fibers for developing thermoplastic and thermoset composites .…”

Rice husk as a fibre in composites: A review

“…RH may be used as brick kilns, in the rice parboiling process, in a furnace, raw material for sodium silicate production, cleaning and polishing agent in metals, and various machine industries [75,76]. Use of RH has been proposed for building materials like panels and boards paving the way for replacement of wood which has been used traditionally [77,78]. Antunes et al Developed panels using Rice Husk and earth and improved properties were observed ranging from tensile, compressive strength to moisture absorption.…”