نتایج جستجو برای: composites

تعداد نتایج: 45835  

2011
M. ASHOK KUMAR RAMACHANDRA REDDY

Aim of this work was to investigate the tensile, flexural and dielectric properties of composites made by reinforcing Sansevieria cylindrica as a new natural fibre into a rubber based polyester matrix. The fibres extracted by retting and manual processes were used to fabricate the composites. These composites were tested for the properties which mentioned above and compared with those of establ...

2015
Yi Zou Helan Xu Yiqi Yang

Switchgrass (SG) stems with lengths up to 10 cm have been used as reinforcement to make lightweight composites with polypropylene (PP) webs. The long SG stems, with simple cut or split and without chemical treatment, were used directly in the composites. Utilizing SG stems for composites not only increases the values of SG but also provides a green, sustainable and biodegradable material for th...

2017
Shahid Mehmood Bo Madsen

Aiming at demonstrating the potential of unidirectional natural fiber-reinforced thermoplastic composites in structural applications, textile flax yarn/thermoplastic polyester composites with variable fiber volume fractions have been manufactured by a filament-winding process followed by a vacuum-assisted compression molding process. The microstructure of the composites shows that the flax fibe...

2013
Deepak Prashar Sanjay Kumar

This research paper deals with the synthesis and characterization of corn starch based composites using resorcinolformaldehyde as cross linker. Acid, base and moisture resistance studies of the composites were also done. Moreover, biodegradation studies of the composites were also done using composting method and the different stages of the biodegradation were evaluated using scanning electron ...

Journal: :Dalton transactions 2014
Mohammad Mahdi Najafpour Mahnaz Abasi Tatsuya Tomo Suleyman I Allakhverdiev

For the first time, we considered Mn oxide/C60 composites as water-oxidizing catalysts. The composites were synthesized by easy and simple procedures, and characterized by some methods. The water-oxidizing activities of these composites were also measured in the presence of cerium(iv) ammonium nitrate. We found that the nanolayered Mn oxide/C60 composites show promising activity toward water ox...

Journal: :Journal of the American Chemical Society 2006
Varun Sambhy Megan M MacBride Blake R Peterson Ayusman Sen

We present a simple method of fabricating highly potent dual action antibacterial composites consisting of a cationic polymer matrix and embedded silver bromide nanoparticles. A simple and novel technique of on-site precipitation of AgBr was used to synthesize the polymer/nanoparticle composites. The synthesized composites have potent antibacterial activity toward both gram-positive and gram-ne...

Journal: :Dental materials journal 2017
Nidal Wanis Elshereksi Mariyam Ghazali Andanastuti Muchtar Che Husna Azhari

Silane is a dominant coupler that is widely used in dentistry to promote adhesion among the components of dental composites. Silica-based fillers can be easily silanized because of their similarly ordered structure. However, silane is hydrolytically degraded in the aqueous oral environment and inefficiently bonds to non-silica fillers. Thus, the development of hydrolytically stable dental compo...

2007
B. Alcock N. O. Cabrera C. T. Reynolds L. E. Govaert T. Peijs

The creation of highly oriented, co-extruded polypropylene (PP) tapes allows the production of recyclable ‘‘all-polypropylene’’ (allPP) composites, with a large temperature processing window and a high volume fraction of highly oriented PP (>90%). The wholly thermoplastic nature of these ‘self-reinforced’ composites implies that the mechanical performance may vary with temperature. This paper d...

2008
Wilfried De Corte Filip Lievens Paul R. Sackett

Previous research on the validity and adverse impact (AI) of predictor composite formation focused on the merits of regression-based or ad hoc composites. We argue for a broader focus. Ad hoc chosen composites are usually not Pareto-optimal, whereas the regression-based composite represents only one element from the total set of Pareto-optimal composites and can, therefore, provide only limited...

Journal: :Bioresource technology 2010
Yanjun Xu Qinglin Wu Yong Lei Fei Yao

The creep behavior of bagasse-based composites with virgin and recycled polyvinyl chloride (B/PVC) and high density polyethylene (B/HDPE) as well as a commercial wood and HDPE composite decking material was investigated. The instantaneous deformation and creep rate of all composites at the same loading level increased at higher temperatures. At a constant load level, B/PVC composites had better...

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