Category Archives: GREEN BIORENEWABLE. BIOCOMPOSITES

BIONANOCOMPOSITES: PROCESSING ASPECTS AND PRODUCTS

Bionanocomposites are a novel class of nanosized materials in the modern day world. The terminology “bionanocomposites” is introduced several years ago to classify an emerging class of biohybrid materials. Bionanocomposites are the com­bination of biopolymers such as proteins, polysaccharides, nucleic acids, etc. with a reinforcing agent having at least one dimension in the nanometer range. The rein­forcing agent may include […]

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BIOLOGICAL PROPERTIES OF POLYMER-HAP COMPOSITE

MTS array as applying for mazan (CellTiter 96® Aqueous One Solution Cell Prolif­eration Assay, Promega, Madison, WI) used the novel tetrazolium compound (MTS) and the electron coupling reagent, phenazine metho sulfate (PMS). MTS is chemi­cally reduced by cells into formazan, which is soluble in tissue culture medium. The measurement of the absorbance of the formazan can be carried out using […]

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THE FACTORS THAT AFFECT SOUND ABSORPTION

The first major step in noise control is to determine the source of the noise be­fore designing the sound absorber. To give an automotive-related example where biocomposites find applications; the engine, the tire-road interaction and the wind are the three major factors that affect the acoustics of the passenger department of a vehicle. Hence, the floor coverings, the headliner, and […]

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SOUND ABSORPTION COEFFICIENT

Normal specific sound absorption coefficient of the materials has been determined by using an impedance tube, two microphones, dual channel frequency analyzer and the Indian Institute of Technology Kharagpur developed MATPRO software36. Test has been done as per ASTM E-1050 standard19. The impedance tube fabricated at the Indian Institute of Technology Khaargpur is used to measure the normal specific sound […]

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INJECTION MOLDING PROCESS

Injection molding process is the most extensively used molding method in the in­dustry used for the production of polymer composites due to its simplicity and fast processing cycle. Injection molding machine mixes and injects a measured amount of matrix and fiber mixture into the mold resulting in the desired product. It consists of three major sections: the injection unit, mold, […]

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FLAX /PLA BASED BIOCOMPOSITES

Among all the natural fiber reinforced biocomposites, the flax based composite shows the best properties when compared to other natural composites, including glass-reinforced traditional composites. Flax fibers offer higher reinforcing prop­erties than hemp and kenaf natural fibers. Namely, comparison of the mechanical properties of the natural fiber reinforced composites has shown that composites based on flax fibers exhibited higher tensile […]

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TENSILE TEST

Tensile tests on fibers were conducted on a tow (strand) disassembled from the fab­ric. The tows in the longitudinal direction in the fabric were separated from the ones in the orthogonal direction. Tests were carried out for both series separately. The tensile properties of the fiber tow were determined at room temperature and 50% relative humidity on an Instron 5548 […]

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EFFECT OF HIGHER ASPECT RATIO NANO-CELLULOSE

The highly transparent and flexible films prepared using NFCs exhibited a dras­tic improvement mechanical properties, with a maximum enhancement in Young’s modulus of 78% and 150% for high molecular weight chitosan and water-soluble high molecular weight chitosan (WSHCH), respectively with 20 wt.% of NFC load­ing; and of 200% and 320% for low molecular weight chitosan and water-soluble low molecular weight […]

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