Effect of wool fibers on thermal and dielectric properties of Alfa fibers reinforced polyester composite

Vibrational analysis based on FTIR measurements were performed on hybrid non-woven Alfa fibers reinforced unsaturated polyester composite (HNWAFRUP) and its constituents. The reinforcement was made up of Alfa and wool fibers in the relative volume fractions ratio 4:1. These non-woven fibers sheet were consolidated mechanically by means of the needle punching. This study revealed that the increase of passages numbers in this device allowed the separation of the Alfa fibers and the reduction of the ligninâ€™s component in these fibers which decreased its hydrophilic character. Chemical reactions between wool and Alfa fibers were based mainly on the appearance of new vibrations originating from wool fibers in the reinforcement. Adhesion mechanism between the matrix and the reinforcement was established by chemical bonds formed by secondary bonding. Tensile testing performed on this composite revealed the enhancement of its mechanical properties attributed to a less fiber to fiber contact of wool fibers. Nevertheless, the decrease of its specific Youngâ€™s modulus revealed the mechanical consolidation effect on Alfa fibers/matrix adhesion.Â

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Effect of wool and thermo-binder fibers on adhesion of alfa fibers in polyester composite

Journal of Applied Physics ◽

10.1063/1.4846215 ◽

2013 ◽

Vol 114 (22) ◽

pp. 224105 ◽

Cited By ~ 9

Author(s):

Med. Amin Omri ◽

A. Triki ◽

M. Guicha ◽

Med. Ben Hassen ◽

M. Arous ◽

...

Keyword(s):

Alfa Fibers ◽

Polyester Composite

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Dielectric Properties and Coulomb Blockade Effect in Nano-Ag/Silicone Resin Modified Polyester Composite

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.126.1148 ◽

2006 ◽

Vol 126 (11) ◽

pp. 1148-1152 ◽

Cited By ~ 1

Author(s):

Xiaobing Dong ◽

Yi Yin ◽

Xiuchen Jiang

Keyword(s):

Dielectric Properties ◽

Coulomb Blockade ◽

Silicone Resin ◽

Polyester Composite

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The internal structure of medullated wool

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100111987 ◽

1984 ◽

Vol 42 ◽

pp. 388-389

Author(s):

Leo Barish

Keyword(s):

Light Microscopy ◽

Internal Structure ◽

Wool Fiber ◽

Guard Hair ◽

Bright Field ◽

Wool Fibers ◽

Thin Skin ◽

Air Pockets

Although most of the wool used today consists of fine, unmedullated down-type fibers, a great deal of coarse wool is used for carpets, tweeds, industrial fabrics, etc. Besides the obvious diameter difference, coarse wool fibers are often medullated.Medullation may be easily observed using bright field light microscopy. Fig. 1A shows a typical fine diameter nonmedullated wool fiber, Fig. IB illustrates a coarse fiber with a large medulla. The opacity of the medulla is due to the inability of the mounting media to penetrate to the center of the fiber leaving air pockets. Fig. 1C shows an even thicker fiber with a very large medulla and with very thin skin. This type of wool is called “Kemp”, is shed annually or more often, and corresponds to guard hair in fur-bearing animals.

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