CHARACTERIZATION OF THE ALGERIAN HALLOYSITE PROPERTIES AND ITS APPLICATION IN NANOBIOCOMPOSITES BASED PHBV

the 3rd African Conference on Research in Chemistry Education

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Field Value
 
Title CHARACTERIZATION OF THE ALGERIAN HALLOYSITE PROPERTIES AND ITS APPLICATION IN NANOBIOCOMPOSITES BASED PHBV
 
Creator Nadjet Dehouche; Université A/Mira de Bejaia; Algerie
 
Subject

 
Description Abstract Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) is one of the most widely studied PHA polymers due to its potential use in packaging, automotive, biomedical, and agricultural applications because of its natural origin, biocompatibility, and thermoplasticity [1]. However, its use is limited by certain inferior properties: slow crystallization rate, relatively difficult processing, low elongation at break and very high crystallinity [2]. Various solutions have been used to solve the above problems, including physical blending, surface modification, block copolymerization, and biosynthesis [3]. Recently, an exponentially increasing number of papers have been published on the successful application of natural halloysite (HNT) in nanocomposites based on different polymer matrices [4]. The study aims to characterize and compare the properties of naturally non modified Algerian halloysite (HNTALG) with a commercial one, known as Northland halloysite noted HNTNZ and their application as nanofillers in a PHBV matrix. Despite the similar chemical formula of the both halloysite and their tubular shape, XRF and EDX analysis showed the presence in high concentration of Mn, Na, K, S and Ca in the HNTALG samples and  minor impurities such as quartz, alunite and calcite were detected in these samples. Cristobalite was detected in the HNTNZ ones. Surface areas were 51.4 and 22.9 g/m² for both HNTAL and HNTNZ respectively. The study of nanocomposites PHBV/HNTs prepared by melt mixing at different clay content 2.5, 5 and 10 wt%,  showed through scanning electron microscopy (SEM) that HNTALG and HNTNZ are partially dispersed in PHBV matrix with the presence of some aggregates. Differential scanning calorimetry (DSC) data indicate no significant change in the degree of crystallinity of PHBV/HNTALG nanocomposites. Furthermore the addition of HNTNZ to the PHBV results in decreasing of the degree of cristallinity and melting temperature. TGA analysis revealed that incorporation of HNTs slightly increases the thermal stability of nanocomposites.
 
Publisher ACRICE2017
ACRICE 2017
 
Contributor
 
Date 2017-09-28 07:46:12
 
Type Peer-reviewed Paper
 
Identifier http://www.univ-setif.dz/OCS/FT/ACRICE/paper/view/213
 
Source ACRICE2017; The third african conference on research in chemistry education
 
Language en
 
Relation http://www.univ-setif.dz/OCS/FT/ACRICE/paper/download/213/338
 
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