Synthetic clay nanocomposite‐based coatings prepared by UV‐cure photopolymerization

Shemper, Bianca S.; Morizur, Jean-François; Alirol, M.; Domènech, Anna; Hulin, V.; Mathias, Lon J.

doi:10.1002/app.20580

Cited by 22 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It consists of layers of about 25 nm in diameter and 0.92 nm in thickness [20]. It has a layer structure composed of repeats of six octahedral magnesium ions sandwiched between two layers of four tetrahedral silicon atoms and an overall empirical formula of: Na 0.7 + [(Si 8 Mg 5.5 Li 0.3 )O 20 (OH) 4 ] -0.7 (20) Laponite is a synthetic material and therefore chemically pure and free from crystalline silica impurities. It is also a very efficient rheology control agent for waterborne systems.…”

Section: Introductionmentioning

confidence: 99%

HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

Kamoun

Menzel

2012

J Polym Res

View full text Add to dashboard Cite

Organophilic sodium montmorillonite (Na-MMT) and Laponite-RD clays were incorporated into photopolymerizable hydroxyethyl starch (HES) modified with 2-hydroxyethyl methacrylate (HEMA). Swelling, mechanical properties and thermal stability of obtained crosslinked nanocomposite polymers were evaluated. A camphorquinoneamine system was used as photoinitiating system in visible light. The interaction between nano-sized filler particles and polymer hydrogel was evaluated by FT-IR spectroscopy and the platelet distribution was investigated by SEM. An increased thermal stability of nanocomposite polymers upon addition of clay was observed by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) indicating interaction between the clay platelets and the polymer chains. The crosslinking density for HES-HEMA/MMT nanocomposite hydrogels as investigated by swelling measurements increases with increasing the organo-clay content. The mechanical properties of virgin hydrogels were improved by the introduction of organo-clay as evidenced by oscillation rheology measurements. Whereas, the increase in crosslink density and storage modulus with clay content for laponite was found to be increasing for all concentrations investigated, for MMT there is an optimum content of ca. 1.5 wt%.

show abstract

Section: Introductionmentioning

confidence: 99%

HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

Kamoun

Menzel

2012

J Polym Res

View full text Add to dashboard Cite

show abstract

“…Shemper et al 146 investigated the effects of Laponite RD on photo-polymerization kinetics and coating properties of MHMA in the presence of hydroxylated dimethyl acrylate crosslinkers. The clay auto-accelerated the reaction, thus high rates and conversions were achieved.…”

Section: Pnc With Laponitementioning

confidence: 99%

“…Intercalation of PEG into Laponite enhanced Li þ ion conductivity in rechargeable lithium batteries. 144 Inan et al 145 studied effects of Laponite on char formation and flame-retardation of its PNC with PA-6.Shemper et al 146 investigated the effects of Laponite RD on photo-polymerization kinetics and coating properties of MHMA in the presence of hydroxylated dimethyl acrylate crosslinkers. The clay auto-accelerated the reaction, thus high rates and conversions were achieved.…”

mentioning

confidence: 99%

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Utracki

Sepehr

Boccaleri

2007

Polymers for Advanced Techs

381

252

View full text Add to dashboard Cite

Synthetic, layered nano-particles for polymeric nanocomposites (PNC's)Utracki, L. A.; Sepehr, M.; Boccaleri, E.Contact us / Contactez nous: nparc.cisti@nrc-cnrc.gc.ca.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site Web page / page Web http://dx.doi.org/10.1002/pat.852 http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=fr LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en This review discusses preparation and use of the synthetic layered nanoparticles in polymer matrices, i.e., in the polymeric nanocomposites (PNCs). Several types of synthetic or semi-synthetic layered materials are considered, namely the phyllosilicates (clays), silicic acid (magadiite), layered double hydroxides (LDHs), zirconium phosphates (ZrPs), and di-chalcogenides. The main advantage of synthetic clays is their chemical purity (e.g. absence of amorphous and gritty contaminants, as well as arsenic, iron, and other heavy metals), white to transparent color that assures reproducibly of brightly colored products, as well as a wide range of aspect ratios, p ¼ 20 to £6000. Several large scale production facilities have been established. The synthetic clay and LDH industries are oriented toward big volume markets: catalysis, foodstuff, cosmetics, pharmaceuticals, toiletry, etc. The use of these materials in PNCs is limited to synthetic clays and LDHs, mainly for reinforcement, permeability control, reduction of flammability, and stabilization, e.g. during dehydrohalogenation of chlorinated macromolecules. The use of lamellar ZrPs and di-chalcogenides is at the laboratory stage of functional polymeric systems development, e.g. for electrically conductive materials, catalysts or support for catalysts, in photochemistry, molecular and chiral recognition, or in fuel cell technologies, etc. Copyright # 2007 John Wiley & Sons, Ltd.KEYWORDS: polymeric nanocomposites; nanoparticles; clay; layered double hydroxides; matrix POLYMERS FOR ADVANCED TECHNOLOGIES Polym. Adv. Technol. 2007; 18: 1-37 Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/pat.852 AUTHORS' BIOGRAPHIESDr Leszek A. Utracki was born and educated (up to Habilitation) in Poland. After the post-doctoral stage at USC in Los Angeles with Robert Simha he settled in Canada. His passionate research interest has been within the field of thermodynamics, rheology and processing of multicomponent, multiphase polymeric systems. During the 55 years in the profession he has published several hundred articles, book chapters, books, patents, etc., which has placed him on the ISI li...

show abstract

“…The effect of clay on the photopolymerization kinetics and coating properties of alkyl acrylate systems in the presence of novel dicarylate and dimethacrylate crosslinkers is reported [12,13]. In the presence of clay, earlier onset of autoacceleration was observed, high rates of polymerization were achieved, and high-final overall conversions were reached.…”

Section: Introductionmentioning

confidence: 99%

“…However, there have been several photoinduced polymerizations in microemulsion [19,20], emulsion [21,22], and in micellar media [10][11][12][13][23][24][25]. Monomer microemulsions and micellar systems are thermodynamically stable and form spontaneously with an appropriate combination of a surfactant and a costabilizer [26].…”

Section: Introductionmentioning

confidence: 99%

On photoinduced miniemulsion polymerization of butyl acrylate with clay

Capek

2012

Designed Monomers and Polymers

View full text Add to dashboard Cite

The miniemulsion polymerizations (MiEPs) of butyl acrylate (BA) initiated by UV-light have been studied. The oil-soluble dibenzoyl peroxide was used as a photoinitiator. Furthermore, the effect of sodium montmorillonite on kinetics and BA miniemulsion stabilized by anionic sodium dodecylsulfate (SDS) and anionic cetyltrimethylammonium bromide (CTAB) was studied. The polymerization rate vs. conversion curve of the photoinduced MiEP of BA was described by two and four nonstationary rate intervals. Two rate intervals with one rate maximum was observed with CTAB and four nonstationary rate intervals with two rate maxima appeared with SDS. Variation of the rate of polymerization with conversion was discussed in terms of types of initiating radicals and the gel effect.Keywords: photoinduced miniemulsion polymerization; clays; kinetics; composite nanoparticles Introduction For the past 20 years, there has been increased attention paid to the synthesis of nanocomposites based on either intercalated or exfoliated clay dispersed into various matrix polymers [1][2][3][4][5].There are also some studies on the formation of composite nanoparticles by the dispersion polymerization of monomers with clays as was reviewed by Capek [6]. As an alternative to the procedures described above, the preparation of nanocomposites using UV-curing technology has only recently been reported as summarized below.There are also several studies. Monomer polarity, monomer functionality, and the functional groups on the organoclay surfaces significantly impact both the degree of clay exfoliation and photopolymerization kinetics. The addition of polymerizable organoclays increases photopolymerization rate in sufficiently exfoliated clay systems, whereas the rate decreases with lower degrees of clay exfoliation. With clay exfoliation, the effective surface area is increased, resulting in immobilization of a greater number of the propagating radicals and decreased termination [7].A photoinitiator intercalated into montmorillonite had high photoinitiation efficiency, even only 1/100 (w/w) modified clay could initiate the radical polymerization with the 87% acrylate conversion on UV-light exposure. The d spacing could be enlarged to 13.9 nm after photopolymerization with organoclay loading. This approach provided a novel pathway for using the highly exfoliated clay-polymer composites for designing intercalating agents capable of introducing different functional groups [8,9].The functionalization of the sodium montmorillonite (MMTNa) surface with glycidylpropyl-triethoxysylane allows to obtain a new modified clay mineral which can be dispersed

show abstract

Synthetic clay nanocomposite‐based coatings prepared by UV‐cure photopolymerization

Cited by 22 publications

References 35 publications

HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

HES-HEMA nanocomposite polymer hydrogels: swelling behavior and characterization

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

On photoinduced miniemulsion polymerization of butyl acrylate with clay

Contact Info

Product

Resources

About