Use of functionalized boehmite nanoparticles to improve the hardness and tribological properties of polyurethane films

Date

2018-01-13

Author

Eroglu, Gulden
Gündüz, Güngör
Çolak, Üner
MAVİŞ, BORA

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

147
views

0
downloads

Plate-like boehmite nanoparticles (BH) produced from aluminum hydroxide by hydrothermal process were functionalized in one step with two different diisocyanates. The amount of free isocyanates that were available for polymerization reaction was determined to be higher in functionalization with the aromatic diisocyanate (diphenylmethane-4,4'-diisocyanate -MDI). In composite film production MDI functionalized BH (MDI-BH) was used. Polyurethane based nanocomposite films were produced through polymerization of non-functionalized and MDI-BH with two different polyester-polyols that were synthesized by the esterification of 1,4 butanediol with either adipic acid or phthalic anhydride. It was impossible to form films suitable for hardness and tribological tests with non-functionalized BH. Up to 1 wt% MDI-BH additions were effective in increasing the hardness and scratch resistance of films. The increases in abrasion resistance were more significant and followed the increasing trend for MDI-BH additions even up to 5 wt%. The highest increase, which was 400% with respect to the unmodified resin was observed with adipic acid based polyols and this result was obtained at MDI-BH content of 3 wt%.

Subject Keywords

Tribological properties, Film, Nanocomposite, Polyurethane, Nanoparticle, Boehmite, Functionalization, Diisocyanate

URI

https://hdl.handle.net/11511/57214

Journal

JOURNAL OF POLYMER RESEARCH

DOI

https://doi.org/10.1007/s10965-018-1442-5

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Mechanism and characterization studies on boron carbides deposited by chemical vapor deposition technique Karaman, Mustafa; Özbelge, Hilmi Önder; Sezgi, Naime Aslı; Doğu, Timur (2005-12-02) Boron carbide was produced in an impinging jet CVD reactor from a gas mixture of BCl3, CH4 and H-2. The mass transfer limitations on the reaction kinetics were minimised by the jet impingement on the substrate surface. XPS characterization of the produced deposits revealed a nearly pure boron carbide phase containing small amounts of oxy-boron and oxy-carbon species. After a detailed kinetic study, a reaction model was proposed to predict the rates of boron carbide and dichloroborane formation reactions. In...
Characterization of Ti6Al7Nb alloy foams surface treated in aqueous NaOH and CaCl2 solutions Butev, Ezgi; ESEN, ZİYA; Bor, Sakir (2016-07-01) Ti6Al7Nb alloy foams having 53-73% porosity were manufactured via evaporation of magnesium space holders. A bioactive 1 mu m thick sodium hydrogel titanate layer, NaxH2-xTiyO2y+1., formed after 5 M NaOH treatment, was converted to crystalline sodium titanate, Na2TiyO2y+1, as a result of post-heat treatment. On the other hand, subsequent CaCl2 treatment of NaOH treated specimens induced calcium titanate formation. However, heat treatment of NaOH-CaCl2 treated specimens led to the loss of calcium and disappea...
Production of core-shell type conducting FTO/TiO2 photoanode for dye sensitized solar cells Icli, Kerem Cagatay; Yavuz, Halil Ibrahim; Özenbaş, Ahmet Macit (2014-02-01) Core-shell type photoanode composed of electrically conducting fluorine doped tin dioxide (FTO) matrix and TiO2 shell layer was prepared and applied in dye sensitized solar cells. Effects of fluorine doping on tin dioxide based cells and precursor material on shell layer were investigated. Fluorine doped tin dioxide nanoparticles were synthesized under hydrothermal conditions and resistivity value down to 17 Omega cm was achieved. Cells constructed from FTO nanoparticles show enhanced performance compared t...
Development of novel Ag/bauxite nanocomposite as a heterogeneous catalyst for biodiesel production Bet-Moushoul, Elsie; Farhadi, Khalil; Mansourpanah, Yaghoub; Molaie, Rahim; Forough, Mehrdad; Nikbakht, Ali Mohammad (2016-07-01) Ag/bauxite nanocomposites have been prepared using in situ reduction of aqueous AgNO3 solution in a bauxite matrix and investigated for the transesterification of sunflower oil with methanol in order to study their potential as heterogeneous catalysts. The prepared nanocopmosites were characterized by XRD, SEM, EDX, FT-IR, and TG- DTA. The Central Composite Design of the Response Surface Methodology was used to optimize the effect of reaction temperature, reaction time, catalyst loading and methanol to oil ...
Use of multi-walled carbon nanotubes in matrix solid phase dispersion extraction combined with gas chromatography Njie, Njaw; Aygün, Rüveyde Sezer; Department of Chemistry (2008) The use of Multi-Walled Carbon Nanotubes (MWCNT) as solid sorbent in Matrix Solid-Phase Dispersion (MSPD) extraction and preconcentration method was presented to determine some commonly used organophosphorus insecticides/OPIs in honey samples using a Gas Chromatography Flame Ionization Detector (GC-FID). OPIs are poisonous compounds used to kill insects and rodents by affecting their nervous system. The limit of detections obtained after MSPD extraction were 7.0 ng/g for Malathion, Malaoxon and Fenitrothion...

Citation Formats

G. Eroglu, G. Gündüz, Ü. Çolak, and B. MAVİŞ, “Use of functionalized boehmite nanoparticles to improve the hardness and tribological properties of polyurethane films,” JOURNAL OF POLYMER RESEARCH, pp. 0–0, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57214.