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Fibre Composite (fibre + composite)

Distribution by Scientific Domains

Polymers and Materials Science	50%

Selected Abstracts

Atmospheric Pressure Plasma Treatment of Glass Fibre Composite for Adhesion Improvement

PLASMA PROCESSES AND POLYMERS, Issue S1 2007
Yukihiro Kusano
Abstract Glass-fibre-reinforced polyester composite plates were treated with an atmospheric pressure dielectric barrier discharge. Synthetic air was used as the treatment gas. The water contact angle dropped markedly from 84 to 22° after a 2-s treatment, and decreased to 0° when the composite plates were treated for more than 30 s. X-Ray photoelectron spectroscopic analysis showed that the contents of aluminium and oxygen on the surface increased with the plasma treatment. The adhesion strength of the 2-s treated surface was comparable to or higher than that achieved by conventional mechanical surface roughening. It decreased when the surfaces were treated for 5 and 15 s, but recovered for 30-s treatment. [source]

A soluble fibre gel produced from rice bran and barley flour as a fat replacer in Asian foods

INTERNATIONAL JOURNAL OF FOOD SCIENCE & TECHNOLOGY, Issue 1 2004
George E. Inglett
Summary A hydrocolloidal fibre composite made from rice bran and barley flour, called Ricetrim, was found to have similar rheological properties to coconut cream. Coconut cream displayed a very narrow region of linear viscoelastic behaviour, both above and below strain values of 0.1%, the oscillatory shear modulus dropped sharply with increasing strain, indicating non-linear viscoelastic behaviour. This region of linear viscoelastic behaviour extended to strains of 10%. When Ricetrim was substituted for coconut cream in Thai foods, it was found to produce acceptable products, but with lower saturated fat contents. Cookies, pumpkin pudding, layer cake, dip for pot crust, taro custard and sauté chicken curry were produced with fat contents reduced by 47.8, 94.3, 59.8, 75.3, 61.3 and 60.6%, respectively. Some differences in flavour and texture were observed at the higher levels of substitution, but these differences appeared to present only small changes in the overall score of general acceptability, or suitability, of the fibre gel foods. Scanning electron micrographs of the pumpkin pudding revealed only small changes in their surfaces with Ricetrim addition, even at higher levels of substitution. [source]

Processing, properties and stability of biodegradable composites based on Mater-Bi® and cellulose fibres

POLYMERS FOR ADVANCED TECHNOLOGIES, Issue 11-12 2003
D. Puglia
Abstract In this work, the behaviour of biocomposites obtained by the addition of flax cellulose pulp to Mater-Bi®, a commercial thermoplastic matrix based on starch, has been studied in comparison with traditional glass fibre composites. The composites were produced by compounding with a twin-screw extruder. Depending on the kind of fibre, reinforcement contents of 10,40% were obtained. The mechanical behaviour, both in normal conditions and after water absorption, was analysed. It has been noted that the addition of cellulose pulp increases the composite modulus more than glass fibre: in fact, a poor adhesion of the interface between the glass fibre and Mater-Bi® has been observed. The thermal degradation behaviour of the composite has been studied by thermogravimetric analysis (TGA). Different degradation peaks have been observed and the activation energies, related to the main peak, have been calculated. The addition of cellulose pulp produces better mechanical properties and higher thermal stability. Copyright © 2003 John Wiley & Sons, Ltd. [source]

Incorporation of proteins within alginate fibre-based scaffolds using a post-fabrication entrapment method

JOURNAL OF PHARMACY AND PHARMACOLOGY: AN INTERNATI ONAL JOURNAL OF PHARMACEUTICAL SCIENCE, Issue 7 2006
Qingpu Hou
In this study, a physical entrapment process was explored for the incorporation of proteins within preformed fibrous alginates and the release profile was tuned by varying the processing parameters. The entrapment process was carried out in a series of aqueous solutions at room temperature and involved pre-swelling of the fibrous alginate within a Na+ -rich solution, followed by exposure to the protein of choice and entrapping it by re-establishing cross-links of alginate with BaCl2. Entrapment and release of fluorescein isothiocyanate-labelled bovine serum albumin (FITC-BSA), a model protein, was studied. It was found that a sustained release of the incorporated protein in cell culture medium for about 6 days was achieved. The main factors determining the release profile included the NaCl/CaCl2 ratio in the pre-swelling solution, protein concentration, and the exposure time. To retard protein release, alginate fibres with entrapped FITC-BSA were processed together with poly(d, l -lactide) (PDLLA) into porous alginate fibre/PDLLA composites using supercritical CO2. In this manner, release of the protein for up to 3 months was achieved. [source]