Biomaterial Database

Thermoplastic cassava starch/poly(lactic acid) blend reinforced with coir fibres. 2020

Patra Chotiprayon, and Buchita Chaisawad, and Rangrong Yoksan

Department of Packaging and Materials Technology, Kasetsart University, Bangkok 10900, Thailand.

One way to obtain more benefit from coconut waste is to utilise coir fibre (CF) as reinforcement in biodegradable plastics. The current work aims to study the effect of CF on the performance of a thermoplastic starch (TPS)/poly(lactic acid) (PLA) blend. TPS/PLA/CF biocomposites with a constant TPS: PLA ratio of 60:40 by weight and various concentrations of CF (2.7, 5.5, 8.2, and 10.9 wt%) were fabricated using a twin-screw extruder and then injection moulded into dumbbell-shaped specimens for property testing. The obtained TPS/PLA/CF biocomposites exhibited improved stiffness and hardness, corresponding to the stronger hydrogen bond interaction between starch and PLA and/or starch and CF and the increased PLA crystallinity. Due to the reinforcing effect, the biocomposites also exhibited lower extensibility, tensile strength and impact strength compared to the TPS/PLA blend. Incorporating CF enhanced compatibility between the TPS and PLA phases; however, it also caused reduced melt flow ability, increased shear viscosity, and a decreased shear thinning effect of the blend. The resulting TPS/PLA/CF biocomposites could potentially be used to produce bio-based and biodegradable injection-moulded products.

UI	MeSH Term	Description	Entries
D008031	Lignin	The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed)	Lignins
D011091	Polyesters	Polymers of organic acids and alcohols, with ester linkages--usually polyethylene terephthalate; can be cured into hard plastic, films or tapes, or fibers which can be woven into fabrics, meshes or velours.	Polyester
D002365	Manihot	A plant genus of the family EUPHORBIACEAE that is perennial with conspicuous, almost palmate leaves like those of RICINUS but more deeply parted into five to nine lobes. It is a source of a starch after removal of the cyanogenic glucosides. The common name of Arrowroot is also used with Maranta (MARANTACEAE). The common name of yuca is also used for YUCCA.	Arrowroot, Brazilian,Brazilian Arrowroot,Cassava,Kasaba,Manioc,Tapioca,Manihot esculenta,Arrowroots, Brazilian,Brazilian Arrowroots,Cassavas,Kasabas,Manihot esculentas,Manihots,Maniocs,Tapiocas,esculenta, Manihot
D012212	Rheology	The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.	Flowmetry,Velocimetry,Velocimetries
D013213	Starch	Any of a group of polysaccharides of the general formula (C6-H10-O5)n, composed of a long-chain polymer of glucose in the form of amylose and amylopectin. It is the chief storage form of energy reserve (carbohydrates) in plants.	Amylomaize Starch,Amylum,Cornstarch,Keoflo,Starch, Amylomaize
D013696	Temperature	The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.	Temperatures
D013816	Thermodynamics	A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)	Thermodynamic
D014783	Viscosity	The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Viscosities
D017550	Spectroscopy, Fourier Transform Infrared	A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained.	FTIR,Fourier Transform Infrared Spectroscopy,Spectroscopy, Infrared, Fourier Transform
D055595	Mechanical Phenomena	The properties and processes of materials that affect their behavior under force.	Mechanical Concepts,Mechanical Processes,Mechanical Phenomenon,Mechanical Process,Concept, Mechanical,Concepts, Mechanical,Mechanical Concept,Phenomena, Mechanical,Phenomenon, Mechanical,Process, Mechanical,Processes, Mechanical