Over past few decades, the electronic boards density and performance are enhanced by entrenching the components in the interior surfaces of the printed circuit boards (PCBs).The worthiness of this novel innovation has to be probed to warranty the functioning of electronic boards acquiesced to callous environments. In this study, a novel advancement concentrating on the development of bio-based materials for the PCB applications has been documented. The biobased composite from rice husk-epoxy resin could impendingly substitute the conventional synthetic fiber reinforced epoxy composites in PCB applications. The essential properties of biocomposites were assessed such as tensile and bending properties, dielectric property, thermal properties, moisture absorption, microdrilling, biodegradability, and flammability. Results obtained found that, these biocomposites were promising for PCB application.

In the present study, the effect of stacking sequence on mechanical, physical, and biodegradability properties of treated coconut leaf sheath/jute/glass fabric reinforced phenol formaldehyde hybrid composites were studied. The hybrid composite laminates were fabricated by using hand lay-up technique. The specimen preparation and testing were conducted as per ASTM standards. Obtained results indicated that the incorporation of coconut leaf sheath with glass fiber of hybrid composites has greater effect on tensile and hardness properties. Coconut leaf sheath fibers treated with NaOH solution shows significant improvement for adhesion between fiber and matrix. Water absorption plots for different periods of immersion indicated that coconut leaf sheath with glass hybrid composites offer better resistance to water absorption than pure natural fiber reinforced composites. Thickness swelling of the hybrid composites increases due to increase in the percentage of water absorption of the composites. From SEM analysis of the tensile fractured surface of hybrid composites, it is found that the failure of composite is due to poor interfacial bonding between fiber and matrix. An overall comparison of all the laminates revealed that the hybrid laminates of coconut leaf sheath with extreme glass fibers plies as skin layer is the optimum combination with a good balance between the properties. So they may be suited in manufacturing of car doors, car interiors, dash boards, headliners, decking, parcel shelves, pallets, spare tyre covers, spare-wheel pan, seat backs, etc.

No abstract

Destructive methods, viz. tensile test, bending test, water absorption test, chemical absorption test, and biodegradable test of woven sheep fiber reinforced with 40% and 50% epoxy composites, were studied at different operating conditions. The present investigation is focused on the physical and chemical characterization of the sheep wool fiber-reinforced polymer-matrix composites. Result shows that tensile and bending tests of woven sheep fiber composite of composition (50-50) have high strength and maximum bending compared to woven sheep fiber composite of composition (60-40). The (50-50) composition is having more moisture absorption than (60-40) composition, whereas (60-40) composition has more chemical absorption than (50-50) composition. Biodegradable test shows that compositions (50-50) and (60-40) after few days gain almost the same amount of weight. Destructed surfaces were examined using scanning electron microscope.

No abstract

No abstract

This article describes the development and characterization of mercerized and untreated naturally woven waste coconut leaf sheath (CLS) fiber‐reinforced phenol‐formaldehyde (PF) composites. The composites of CLS fiber with 60% and 40% PF were manufactured hand lay technique followed by compression molding method. The investigation of composites was performed by applying tensile, bending, impact test, and measurements of water absorption rate and biodegradability characteristics. The CLS was mercerized using 5% of NaOH. The results confirm the superiority in mechanical properties of treated CLS fiber composites in respect to the untreated ones. The better properties are driven by lower hydrophilic hydroxyl groups and reduced impurities detected on the CLS fibers, which in turn reveals stronger adhesion and superior compatibility between CLS fiber and PF matrix. The rate of water absorption was evaluated within four different types of water conditions such as normal water, bore, distilled, and sea water, respectively. A degradation test was carried to determine biodegradability properties of composites. The superior results of treated CLS fiber composites validate this composite as a good candidate material for domestic and structural applications.

No abstract