PMID- 25817663
OWN - NLM
STAT- MEDLINE
DCOM- 20160105
LR  - 20181202
IS  - 1879-1344 (Electronic)
IS  - 0144-8617 (Linking)
VI  - 122
DP  - 2015 May 20
TI  - Influence of alkali metal cations on the thermal, mechanical and morphological 
      properties of rectorite/chitosan bio-nanocomposite films.
PG  - 230-6
LID - S0144-8617(14)01249-1 [pii]
LID - 10.1016/j.carbpol.2014.12.053 [doi]
AB  - The main theme of this work is to study the influence of ion-exchangeable alkali 
      metal cations, such as: Li(+), Na(+), K(+), and Cs(+) on the thermal, mechanical 
      and morphological properties. In this regard, a set of rectorite/chitosan 
      (REC-CS) bio-nanocomposite films (BNCFs) was prepared by facile reaction of 
      chitosan with ion-exchanged REC clay. The microstructure and morphology of BNCFs 
      were investigated with XRD, TEM, SEM and AFM. Thermal and tensile properties of 
      BNCFs were also investigated. As revealed from TEM and XRD results, the BNCFs 
      featured a mixed morphology. Some intercalated clay sheets, together with 
      nano-sized clay tactoids were obtained in LiREC/CS, NaREC/CS and KREC/CS of the 
      BNCFs. From fractured surface study, via SEM, it was observed that the dispersion 
      of chitosan polymer attaches to (and covers) the clay platelets. FTIR confirmed 
      strong hydrogen bonds between clay and chitosan polymer. In addition, the thermal 
      stabilities significantly varied when alkali metal cations varied from Li(+) to 
      Cs(+). The BNCFs featured high tensile strengths (up to 84 MPa) and tensile 
      moduli (up to 45 GPa). After evaluating these properties of BNCFs, we came to 
      conclusion that these bio-nano composites can be used for packaging applications.
CI  - Copyright (c) 2015 Elsevier Ltd. All rights reserved.
FAU - Babul Reddy, A
AU  - Babul Reddy A
AD  - Department of Polymer Technology, Tshwane University of Technology, CSIR Campus, 
      Pretoria, South Africa.
FAU - Jayaramudu, J
AU  - Jayaramudu J
AD  - Department of Polymer Technology, Tshwane University of Technology, CSIR Campus, 
      Pretoria, South Africa; DST/CSIR Nanotechnology Innovation Centre, National 
      Centre for Nano-Structured Materials, Council for Scientific and Industrial 
      Research, Pretoria 0001, South Africa.
FAU - Siva Mohan Reddy, G
AU  - Siva Mohan Reddy G
AD  - Department of Polymer Technology, Tshwane University of Technology, CSIR Campus, 
      Pretoria, South Africa; Department of Applied Chemistry, University of 
      Johannesburg, Doornfontein 2028, South Africa.
FAU - Manjula, B
AU  - Manjula B
AD  - Department of Polymer Technology, Tshwane University of Technology, CSIR Campus, 
      Pretoria, South Africa.
FAU - Sadiku, E R
AU  - Sadiku ER
AD  - Department of Polymer Technology, Tshwane University of Technology, CSIR Campus, 
      Pretoria, South Africa. Electronic address: SadikuR@tut.ac.za.
LA  - eng
PT  - Journal Article
DEP - 20150102
PL  - England
TA  - Carbohydr Polym
JT  - Carbohydrate polymers
JID - 8307156
RN  - 0 (Aluminum Silicates)
RN  - 0 (Cations)
RN  - 0 (Metals, Alkali)
RN  - 0 (Minerals)
RN  - 0 (Polymers)
RN  - 0 (rectorite)
RN  - 9012-76-4 (Chitosan)
RN  - T1FAD4SS2M (Clay)
SB  - IM
MH  - Aluminum Silicates/*chemistry
MH  - Cations/*chemistry
MH  - Chitosan/*chemistry
MH  - Clay
MH  - Hydrogen Bonding
MH  - Metals, Alkali/*chemistry
MH  - Microscopy, Electron, Scanning
MH  - Minerals/*chemistry
MH  - Nanocomposites/chemistry
MH  - Polymers/*chemistry
MH  - Surface Properties
MH  - Tensile Strength
OTO - NOTNLM
OT  - Alkali metals
OT  - Chitosan
OT  - Nanocomposite films
OT  - Rectorite
OT  - Thermal properties
OT  - X-ray diffraction
EDAT- 2015/03/31 06:00
MHDA- 2016/01/06 06:00
CRDT- 2015/03/31 06:00
PHST- 2014/09/16 00:00 [received]
PHST- 2014/12/18 00:00 [revised]
PHST- 2014/12/20 00:00 [accepted]
PHST- 2015/03/31 06:00 [entrez]
PHST- 2015/03/31 06:00 [pubmed]
PHST- 2016/01/06 06:00 [medline]
AID - S0144-8617(14)01249-1 [pii]
AID - 10.1016/j.carbpol.2014.12.053 [doi]
PST - ppublish
SO  - Carbohydr Polym. 2015 May 20;122:230-6. doi: 10.1016/j.carbpol.2014.12.053. Epub 
      2015 Jan 2.