Encapsulation of TiO2 nanoparticles with poly(4-vinylpyridine) using surface functionalized thiol-lactam initiated radical polymerization.

Encapsulation of TiO2 nanoparticles with poly(4-vinylpyridine) using surface functionalized thiol-lactam initiated radical polymerization.

Journal of nanoscience and nanotechnology (2013-07-19)

Md Rafiqul Islam, Long Giang Bach, Jung Hyun Jeong, Hyun Gyu Kim, Kwon Taek Lim

ABSTRACT

A nanocomposite of TiO2 nanoparticle with an electroactive poly(4-vinylpyridine) (PVP) was synthesized via a simple surface thiol-lactam initiated radical polymerization upon grafting from protocol. This can be achieved through the primary modification of the TiO2 surface with a silane coupling agent leading to thiol functionalized TiO2 (TiO2-SH). Subsequently, a controlled radical polymerization of 4-vinylpyridine in the presence of TiO2-SH and butyrolactam afforded PVP-g-TiO2 nanocomposites. The grafting of PVP on the surface of TiO2 was confirmed by FT-IR, TGA, XPS, EDX, TEM and SEM analyses. The UV-vis studies of the synthesized PVP-g-TiO2 nanocomposite demonstrated an exceptionally good dispersibility in organic solvents.

MATERIALS

Product Number

Brand

Product Description

472352

Sigma-Aldrich

Poly(4-vinylpyridine), average M_w ~160,000

204757

Sigma-Aldrich

Titanium(IV) oxide, rutile, ≥99.98% trace metals basis

224227

Sigma-Aldrich

Titanium(IV) oxide, rutile, powder, <5 μm, ≥99.9% trace metals basis

204730

Sigma-Aldrich

Titanium(IV) oxide, rutile, 99.995% trace metals basis

248576

Sigma-Aldrich

Titanium(IV) oxide, anatase, powder, −325 mesh, ≥99% trace metals basis

637262

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Titanium(IV) oxide, rutile, nanopowder, <100 nm particle size, 99.5% trace metals basis

637254

Sigma-Aldrich

Titanium(IV) oxide, anatase, nanopowder, <25 nm particle size, 99.7% trace metals basis

472344

Sigma-Aldrich

Poly(4-vinylpyridine), average M_w ~60,000

232033

Sigma-Aldrich

Titanium(IV) oxide, anatase, powder, 99.8% trace metals basis

700347

Sigma-Aldrich

Titanium(IV) oxide, mixture of rutile and anatase, nanoparticles, <150 nm particle size (volume distribution, DLS), dispersion, 40 wt. % in H₂O, 99.5% trace metals basis

635057

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634662

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718467

Sigma-Aldrich

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677469

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14021

Sigma-Aldrich

Titanium(IV) oxide, ReagentPlus^®, ≥99%

14027

Sigma-Aldrich

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