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Preparation and Characterization of Polyhydroxybutyrate/Polycaprolactone Nanocomposites

Authors :
Cha Ping Liau
Mansor Bin Ahmad
Kamyar Shameli
Wan Md Zin Wan Yunus
Nor Azowa Ibrahim
Norhazlin Zainuddin
Yoon Yee Then
Source :
The Scientific World Journal, Vol 2014 (2014)
Publication Year :
2014
Publisher :
Hindawi Limited, 2014.

Abstract

Polyhydroxybutyrate (PHB)/polycaprolactone (PCL)/stearate Mg-Al layered double hydroxide (LDH) nanocomposites were prepared via solution casting intercalation method. Coprecipitation method was used to prepare the anionic clay Mg-Al LDH from nitrate salt solution. Modification of nitrate anions by stearate anions between the LDH layers via ion exchange reaction. FTIR spectra showed the presence of carboxylic acid (COOH) group which indicates that stearate anions were successfully intercalated into the Mg-Al LDH. The formation of nanocomposites only involves physical interaction as there are no new functional groups or new bonding formed. X-ray diffraction (XRD) and transmission electron microscopy (TEM) indicated that the mixtures of nanocomposites are intercalated and exfoliated types. XRD results showed increasing of basal spacing from 8.66 to 32.97 Å in modified stearate Mg-Al LDH, and TEM results revealed that the stearate Mg-Al LDH layers are homogeneously distributed in the PHB/PCL polymer blends matrix. Enhancement in 300% elongation at break and 66% tensile strength in the presence of 1.0 wt % of the stearate Mg-Al LDH as compare with PHB/PCL blends. Scanning electron microscopy (SEM) proved that clay improves compatibility between polymer matrix and the best ratio 80PHB/20PCL/1stearate Mg-Al LDH surface is well dispersed and stretched before it breaks.

Subjects

Subjects :
Technology
Medicine
Science

Details

Language :
English
ISSN :
23566140 and 1537744X
Volume :
2014
Database :
Directory of Open Access Journals
Journal :
The Scientific World Journal
Publication Type :
Academic Journal
Accession number :
edsdoj.890ae98e8649549fc4823541fc90bb
Document Type :
article
Full Text :
https://doi.org/10.1155/2014/572726