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Graphite nanoreinforcements in polym...

Fukushima, Hiroyuki.

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Graphite nanoreinforcements in polymer nanocomposites.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Graphite nanoreinforcements in polymer nanocomposites./
Author:	Fukushima, Hiroyuki.
Description:	287 p.
Notes:	Adviser: Lawrence T. Drzal.
Contained By:	Dissertation Abstracts International64-05B.
Subject:	Chemistry, Polymer. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3092144

Graphite nanoreinforcements in polymer nanocomposites.
Fukushima, Hiroyuki.

Graphite nanoreinforcements in polymer nanocomposites. - 287 p.

Adviser: Lawrence T. Drzal.

Thesis (Ph.D.)--Michigan State University, 2003.

Nanocomposites composed of polymer matrices with clay reinforcements of less than 100 nm in size, are being considered for applications such as interior and exterior accessories for automobiles, structural components for portable electronic devices, and films for food packaging. While most nanocomposite research has focused on exfoliated clay platelets, the same nanoreinforcement concept can be applied to another layered material, graphite, to produce nanoplatelets and nanocomposites. Graphite is the stiffest material found in nature (Young's Modulus = 1060 GPa), having a modulus several times that of clay, but also with excellent electrical and thermal conductivity. The key to utilizing graphite as a platelet nanoreinforcement is in the ability to exfoliate this material. Also, if the appropriate surface treatment can be found for graphite, its exfoliation and dispersion in a polymer matrix will result in a composite with not only excellent mechanical properties but electrical properties as well, opening up many new structural applications as well as non-structural ones where electromagnetic shielding and high thermal conductivity are requirements.Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Graphite nanoreinforcements in polymer nanocomposites.
LDR:03995nam 2200277 a 45 001 934721
005 20110509
008 110509s2003 eng d
035 $a (UnM)AAI3092144
035 $a AAI3092144
040 $a UnM $c UnM
100 1 $a Fukushima, Hiroyuki. $3 1258420
245 1 0 $a Graphite nanoreinforcements in polymer nanocomposites.
300 $a 287 p.
500 $a Adviser: Lawrence T. Drzal.
500 $a Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2343.
502 $a Thesis (Ph.D.)--Michigan State University, 2003.
520 $a Nanocomposites composed of polymer matrices with clay reinforcements of less than 100 nm in size, are being considered for applications such as interior and exterior accessories for automobiles, structural components for portable electronic devices, and films for food packaging. While most nanocomposite research has focused on exfoliated clay platelets, the same nanoreinforcement concept can be applied to another layered material, graphite, to produce nanoplatelets and nanocomposites. Graphite is the stiffest material found in nature (Young's Modulus = 1060 GPa), having a modulus several times that of clay, but also with excellent electrical and thermal conductivity. The key to utilizing graphite as a platelet nanoreinforcement is in the ability to exfoliate this material. Also, if the appropriate surface treatment can be found for graphite, its exfoliation and dispersion in a polymer matrix will result in a composite with not only excellent mechanical properties but electrical properties as well, opening up many new structural applications as well as non-structural ones where electromagnetic shielding and high thermal conductivity are requirements.
520 $a In this research, a new process to fabricate exfoliated nano-scale graphite platelets was established (Patent pending). The size of the resulted graphite platelets was less than 1 um in diameter and 10 nm in thickness, and the surface area of the material was around 100 m<super>2</super>/g. The reduction of size showed positive effect on mechanical properties of composites because of the increased edge area and more functional groups attached with it. Also various surface treatment techniques were applied to the graphite nanoplatelets to improve the surface condition. As a result, acrylamide grafting treatment was found to enhance the dispersion and adhesion of graphite flakes in epoxy matrices. The resulted composites showed better mechanical properties than those with commercially available carbon fibers, vapor grown carbon fibers, or carbon blacks. The exfoliated graphite flakes reached the percolation threshold at 1.93 wt% (1.13 vol%) in an epoxy system and the resistivity of the composite showed 39 ohm•cm with 7 wt% of exfoliated graphite, which is comparable to the high-grade carbon black based systems. The vapor grown carbon fiber based composites showed higher resistivity at the same filler contents while the conventional carbon fiber composites showed much higher resistivity and percolation threshold. Stress distribution analysis by Finite Element Method revealed the stress concentration condition of composite systems is affected by factors such as shape of the reinforcements, aspect ratio, and geological arrangements. Based on these results, an optimal morphology design of nanocomposite system was proposed. Market research revealed that there is a realistic possibility for applying the new process and material in commercial products and a venture business plan was proposed based on this new technology. The venture plan won “The Most Innovative Design” award at the 2002 Michigan Collegiate Entrepreneur's Conference.
590 $a School code: 0128.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Engineering, Materials Science. $3 1017759
690 $a 0495
690 $a 0794
710 2 0 $a Michigan State University. $3 676168
773 0 $t Dissertation Abstracts International $g 64-05B.
790 $a 0128
790 1 0 $a Drzal, Lawrence T., $e advisor
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3092144