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On the strategies for incorporating nanosilica aqueous dispersion inthe synthesis of waterborne polyurethane/silica nanocomposites:Effects on morphology and properties

Peruzzo, Pablo J.; Anbinder, Pablo S.; Pardini, Francisco M.; Pardini, Oscar R.; Plivelic, Tomás LU and Amalvy, Javier I (2016) In Materials Today Communications 6. p.81-91
Abstract
In this work the synthesis of waterborne polyurethane/nanosilica nanocomposites by using two differ-ent strategies is presented, starting from a vinyl terminated polyurethane prepolymer (PUP) based onisophorone diisocyanate and polypropylene glycol, and varying the nanosilica content. In one case, thePUP was dispersed in an aqueous solution containing glycerol-functionalized colloidal nanosilica parti-cles and the dispersion was further polymerized; in the other case, the PUP was dispersed in an aqueousmedia, then colloidal nanosilica was added to the dispersion and then polymerized. A physical mixturewas also prepared for comparative purpose. Films were prepared by casting of the aqueous dispersion.The morphology of the dispersions and... (More)
In this work the synthesis of waterborne polyurethane/nanosilica nanocomposites by using two differ-ent strategies is presented, starting from a vinyl terminated polyurethane prepolymer (PUP) based onisophorone diisocyanate and polypropylene glycol, and varying the nanosilica content. In one case, thePUP was dispersed in an aqueous solution containing glycerol-functionalized colloidal nanosilica parti-cles and the dispersion was further polymerized; in the other case, the PUP was dispersed in an aqueousmedia, then colloidal nanosilica was added to the dispersion and then polymerized. A physical mixturewas also prepared for comparative purpose. Films were prepared by casting of the aqueous dispersion.The morphology of the dispersions and films depended on the incorporation route of nanoparticles aswas observed by SAXS, SEM and TEM. While the blends had significantly less hydrogen bonding betweenthe hard segments of the PU and nanosilica particles, samples prepared by the two different methodsproposed in this work showed an strong interaction between both materials in agreement with FTIR andDSC results. Synthesis pathway plays an important role in order to obtain high performance waterbornepolyurethane/nanosilica composites, since final properties of the films also depended on the nanoparticleincorporation strategy. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nanocomposites, Polyurethane/nanosilica, Waterborne dispersions
in
Materials Today Communications
volume
6
pages
81 - 91
publisher
Elsevier
external identifiers
  • scopus:84958279158
  • wos:000372087200011
ISSN
2352-4928
DOI
10.1016/j.mtcomm.2016.01.002
language
English
LU publication?
yes
id
49348d54-8cbf-4498-b264-0aca9b968634 (old id 8866058)
date added to LUP
2016-03-23 15:17:34
date last changed
2017-08-13 03:54:31
@article{49348d54-8cbf-4498-b264-0aca9b968634,
  abstract     = {In this work the synthesis of waterborne polyurethane/nanosilica nanocomposites by using two differ-ent strategies is presented, starting from a vinyl terminated polyurethane prepolymer (PUP) based onisophorone diisocyanate and polypropylene glycol, and varying the nanosilica content. In one case, thePUP was dispersed in an aqueous solution containing glycerol-functionalized colloidal nanosilica parti-cles and the dispersion was further polymerized; in the other case, the PUP was dispersed in an aqueousmedia, then colloidal nanosilica was added to the dispersion and then polymerized. A physical mixturewas also prepared for comparative purpose. Films were prepared by casting of the aqueous dispersion.The morphology of the dispersions and films depended on the incorporation route of nanoparticles aswas observed by SAXS, SEM and TEM. While the blends had significantly less hydrogen bonding betweenthe hard segments of the PU and nanosilica particles, samples prepared by the two different methodsproposed in this work showed an strong interaction between both materials in agreement with FTIR andDSC results. Synthesis pathway plays an important role in order to obtain high performance waterbornepolyurethane/nanosilica composites, since final properties of the films also depended on the nanoparticleincorporation strategy.},
  author       = {Peruzzo, Pablo J. and Anbinder, Pablo S. and Pardini, Francisco M. and Pardini, Oscar R. and Plivelic, Tomás and Amalvy, Javier I},
  issn         = {2352-4928},
  keyword      = {Nanocomposites,Polyurethane/nanosilica,Waterborne dispersions},
  language     = {eng},
  pages        = {81--91},
  publisher    = {Elsevier},
  series       = {Materials Today Communications},
  title        = {On the strategies for incorporating nanosilica aqueous dispersion inthe synthesis of waterborne polyurethane/silica nanocomposites:Effects on morphology and properties},
  url          = {http://dx.doi.org/10.1016/j.mtcomm.2016.01.002},
  volume       = {6},
  year         = {2016},
}