Durable Polymer Nanocomposite Coatings with Tunable Adhesion and Hydrophobicity

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Problem Statement and Motivation Key Achievements and Future Goals Technical Approach Durable Polymer Nanocomposite Coatings with Tunable Adhesion and Hydrophobicity M. K. Tiwari, 1 I. S. Bayer, 2 T. M. Schutzius, 1 A. Das, 1 C. M. Megaridis 1 1 University of Illinois at Chicago, 2 University of Illinois at Urbana- Champaign Polymer nanocomposite coatings with functional particle fillers in a polymer matrix used to control micro/nanostructure and wetting properties ranging from partially hydrophilic to superhydrophobic. Manipulate adhesion of such coatings to increase durability. Controlled microstructure surfaces are most commonly prepared by lithographic techniques, which make them unsuitable for large-area applications. Target here is to investigate a scalable technique for large-area coatings. Developed novel methods to control CA polymerization. CA demonstrated as a biodegradable alternative to commonly used poly(methyl methacrylate) (PMMA) for improving filler dispersion and adhesion of PVDF. Coating microstructure and surface energy ranging from partially hydrophilic to superhydrophobic. Some coatings also show medically important alcohol repellency. Coatings prepared by scalable techniques (spraying, etc). Publication I.S. Bayer, M.K. Tiwari, C.M. Megaridis, Applied Physics Letters 93, 173902, 2008. Solution-blend poly(vinylidene fluoride) (PVDF) with poly-merized cyanoacylates (CA) . Combine features of PVDF (exceptional thermal, mechanical and chemical barrier; electrical properties) with superior adhesion of CA . Functional micro/nanoparticle fillers impart additional properties like surface energy, microstructure control and improved durability under 40 60 80 100 120 140 160 180 0 1 10 100 Applied stress (kN /m 2 ) W atercontactangle (deg.) 2 % 6 % 7 % 8 % 10 % 6 % ,no PVDF Performance (under mechanical stress) of PVDF/CA nanocomposites containing different percentages of ZnO nanoparticles[1]. Nanocomposite superhydrophobic surface

description

Durable Polymer Nanocomposite Coatings with Tunable Adhesion and Hydrophobicity. M. K. Tiwari, 1 I. S. Bayer, 2 T. M. Schutzius, 1 A. Das, 1 C. M. Megaridis 1 1 University of Illinois at Chicago, 2 University of Illinois at Urbana-Champaign. - PowerPoint PPT Presentation

Transcript of Durable Polymer Nanocomposite Coatings with Tunable Adhesion and Hydrophobicity

Page 1: Durable Polymer  Nanocomposite  Coatings with  Tunable Adhesion and  Hydrophobicity

Problem Statement and Motivation

Key Achievements and Future GoalsTechnical Approach

Durable Polymer Nanocomposite Coatings with Tunable Adhesion and Hydrophobicity

M. K. Tiwari,1 I. S. Bayer,2 T. M. Schutzius,1 A. Das,1 C. M. Megaridis1

1University of Illinois at Chicago, 2University of Illinois at Urbana-Champaign

• Polymer nanocomposite coatings with functional particle fillers in a polymer matrix used to control micro/nanostructure and wetting properties ranging from partially hydrophilic to superhydrophobic.

• Manipulate adhesion of such coatings to increase durability.

• Controlled microstructure surfaces are most commonly prepared by lithographic techniques, which make them unsuitable for large-area applications. Target here is to investigate a scalable technique for large-area coatings.

• Developed novel methods to control CA polymerization. CA demonstrated as a biodegradable alternative to commonly used poly(methyl methacrylate) (PMMA) for improving filler dispersion and adhesion of PVDF.

• Coating microstructure and surface energy ranging from partially hydrophilic to superhydrophobic.

• Some coatings also show medically important alcohol repellency.• Coatings prepared by scalable techniques (spraying, etc).

PublicationI.S. Bayer, M.K. Tiwari, C.M. Megaridis, Applied Physics Letters 93, 173902, 2008.

• Solution-blend poly(vinylidene fluoride) (PVDF) with poly-merized cyanoacylates (CA) .

• Combine features of PVDF (exceptional thermal, mechanical and chemical barrier; electrical properties) with superior adhesion of CA .

• Functional micro/nanoparticle fillers impart additional properties like surface energy, microstructure control and improved durability under mechanical stress or thermal, radiative (UV) exposure.

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60

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120

140

160

180

0 1 10 100

Applied stress (kN/m2)

Wat

er c

onta

ct a

ngle

(deg

.)

2 %

6 %

7 %

8 %

10 %

6 %, no PVDF

Performance (under mechanical stress) of PVDF/CA nanocomposites containing different percentages of ZnO nanoparticles[1].

Nanocomposite superhydrophobic surface