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Reinforcement of Polylactic acid usi...

Isakki, Ram Kumar.

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Reinforcement of Polylactic acid using pyrene functionalized Multi-Walled Carbon Nanotubes.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Reinforcement of Polylactic acid using pyrene functionalized Multi-Walled Carbon Nanotubes./
Author:	Isakki, Ram Kumar.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
Description:	64 p.
Notes:	Source: Masters Abstracts International, Volume: 55-06.
Contained By:	Masters Abstracts International55-06(E).
Subject:	Materials science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10140510
ISBN:	9781339959078

Reinforcement of Polylactic acid using pyrene functionalized Multi-Walled Carbon Nanotubes.
Isakki, Ram Kumar.

Reinforcement of Polylactic acid using pyrene functionalized Multi-Walled Carbon Nanotubes. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 64 p.

Source: Masters Abstracts International, Volume: 55-06.

Thesis (M.S.)--Oklahoma State University, 2015.

The conventional petroleum polymers are being replaced by the biopolymers that are biodegradable, biocompatible, eco-friendly. But to bridge the gap between them in terms of mechanical and thermal stability, reinforcement is used. This paper deals with the review of literature on production of polylactic acid, the reinforcement materials (natural and synthetic) used in the recent past, characterization methods used to determine the mechanical, thermal and morphological properties of the composites and a new method of functionalizing the Multi-Walled Carbon Nanotubes (MWNT) to improve the bonding with Polylactic acid (PLA) using pi-pi stacking. This method would avoid the damage caused by the harsh pretreatment of MWNTs with strong acids for functionalizing them and also provides an alternative method which is safe and effective. When the MWNTs are treated with 1-pyrene butyl amine, the pi-pi stacking occurs along the walls of the MWNTs which functionalizes them and ensures better bonding. The matrix is PLA and the filler material is the functionalized MWNTs. Composites were prepared varying the concentration of the filler material (0, 1, 3, 5 and 7wt %). The tensile strength and modulus was determined using Instron tensile testing machine, the morphological characteristics using Scanning Electron Microscopy (SEM), the thermal stability using the Thermogravimetric Analyzer (TGA) and the chemical bonding between the matrix and filler material was studied using Fourier Transform Infra-red Spectroscopy (FTIR). The composites prepared with 5 wt% exhibited 74.17% increase in the tensile strength and 117.5% increase in the modulus when compared to the neat PLA. The dispersion of the MWNT was studied using SEM.

ISBN: 9781339959078Subjects--Topical Terms:

543314
Materials science.

Reinforcement of Polylactic acid using pyrene functionalized Multi-Walled Carbon Nanotubes.
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520 $a The conventional petroleum polymers are being replaced by the biopolymers that are biodegradable, biocompatible, eco-friendly. But to bridge the gap between them in terms of mechanical and thermal stability, reinforcement is used. This paper deals with the review of literature on production of polylactic acid, the reinforcement materials (natural and synthetic) used in the recent past, characterization methods used to determine the mechanical, thermal and morphological properties of the composites and a new method of functionalizing the Multi-Walled Carbon Nanotubes (MWNT) to improve the bonding with Polylactic acid (PLA) using pi-pi stacking. This method would avoid the damage caused by the harsh pretreatment of MWNTs with strong acids for functionalizing them and also provides an alternative method which is safe and effective. When the MWNTs are treated with 1-pyrene butyl amine, the pi-pi stacking occurs along the walls of the MWNTs which functionalizes them and ensures better bonding. The matrix is PLA and the filler material is the functionalized MWNTs. Composites were prepared varying the concentration of the filler material (0, 1, 3, 5 and 7wt %). The tensile strength and modulus was determined using Instron tensile testing machine, the morphological characteristics using Scanning Electron Microscopy (SEM), the thermal stability using the Thermogravimetric Analyzer (TGA) and the chemical bonding between the matrix and filler material was studied using Fourier Transform Infra-red Spectroscopy (FTIR). The composites prepared with 5 wt% exhibited 74.17% increase in the tensile strength and 117.5% increase in the modulus when compared to the neat PLA. The dispersion of the MWNT was studied using SEM.
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