Surface modification of Ti-6Al-4V alloy for osseointegration by alkaline treatment and chitosan-matrix glass-reinforced nanocomposite coating

In order to improve the mechanical performance of straw fiber reinforced gypsum composite materials, corn straw fiber was modified by alkaline treatment and chemical coating treatment, the influence of different surface modification treatment on mechanical performance of gypsum composite material was studied, and the mechanism of surface modification was discussed. The results indicated that: surface modification treatments could improve the interfacial bonding between straw fiber and desulfurization gypsum, and enhance mechanical performance of composite materials; comparing different treatments, the acrylic chemical coating treatment could enhance the strength of composite materials more outstandingly than other treatments.

Download Full-text

Superhydrophilic surface modification of fabric via coating with nano-TiO2 by UV and alkaline treatment

Applied Surface Science ◽

10.1016/j.apsusc.2014.01.105 ◽

2014 ◽

Vol 297 ◽

pp. 147-152 ◽

Cited By ~ 34

Author(s):

Mingyu Li ◽

Tingting Deng ◽

Shuxian Liu ◽

Fengxiu Zhang ◽

Guangxian Zhang

Keyword(s):

Surface Modification ◽

Alkaline Treatment ◽

Nano Tio2 ◽

Superhydrophilic Surface

Download Full-text

The Effect of Surface Modification on Physical Properties and Morphology of Oil Palm and Rice Husk Fibres

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.812.113 ◽

2013 ◽

Vol 812 ◽

pp. 113-119

Author(s):

Abdullah Farah Dina ◽

Siti Zaleha Sa'ad ◽

Bonnia Noor Najmi ◽

Nor Azowa Ibrahim

Keyword(s):

Surface Modification ◽

Rice Husk ◽

Oil Palm ◽

Lignin Content ◽

Alkaline Treatment ◽

Palm Fruit ◽

X Ray ◽

Ft Ir ◽

Si Content ◽

Effect Of Surface

This study focuses on surface modification of local made fibres for use as reinforcement in the area of polymer matrix composite. Modified oil palm and Rice husk fibres were prepared by using alkaline treatment and the samples were investigated by using Helium pycnometry, Fourier transform infrared spectroscopy (FT-IR), Energy dispersive X-ray fluorescence (ED-XRF) and Field emission scanning electron microscope (FESEM). The oil palm fruit bunch and rice husk fibres were treated with 6.0 w.t % Sodium Hydroxide (NaOH). In order for the treated fibre to be compared, fibres without alkaline treatment were prepared. All the prepared samples were crushed and a sieving machine was used to prepare 100μm particles sizes. The changes in composition of the both fibres due to leakage of original elements as well as the changes in density have been successfully determined by these techniques. Density for both oil palm (OP) and rice husk (RH) fibres decreased after treated. A series of FT-IR spectra confirmed the reduction of the Hemicelluloses and Lignin content after the treatment. The significant changes between untreated and treated fibres were also discussed, whereby the rough surface of fibres becomes smooth due to elimination of impurities. ED-XRF analysis confirmed the percentage of Silica (Si) content for both fibres and proved the reduction of elements present in the composition.

Download Full-text

Surface modification of poly(vinylidene fluoride) by alkaline treatment Part 2. Process modification by the use of phase transfer catalysts

Polymer ◽

10.1016/s0032-3861(00)00328-1 ◽

2001 ◽

Vol 42 (2) ◽

pp. 403-413 ◽

Cited By ~ 71

Author(s):

G.J Ross ◽

J.F Watts ◽

M.P Hill ◽

P Morrissey

Keyword(s):

Surface Modification ◽

Vinylidene Fluoride ◽

Phase Transfer ◽

Alkaline Treatment ◽

Phase Transfer Catalysts ◽

Process Modification ◽

Poly Vinylidene Fluoride

Download Full-text

Structure and Interactions in Chitosan Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.672.257 ◽

2016 ◽

Vol 672 ◽

pp. 257-260 ◽

Cited By ~ 4

Author(s):

Katarzyna Lewandowska ◽

Alina Sionkowska ◽

Gabriel Furtos ◽

Sylwia Grabska ◽

Matra Michalska

Keyword(s):

Atomic Force Microscopy ◽

Acetic Acid ◽

Fourier Transform ◽

Surface Modification ◽

Infrared Spectroscopy ◽

Force Microscopy ◽

Chitosan Matrix ◽

Atomic Force ◽

Mode Atomic Force Microscopy ◽

Film Composites

In the present study, the results of Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) studies of chitosan (Ch) with montmorillonite (MMT) or nanoclay are presented. MMT samples have been used without modification and after nanoclay surface modification. Composites of chitosan with montmorillonite samples were obtained by drop casting suspensions of montmorillonite (3% relative to chitosan) and polymer (2wt%) in 1% acetic acid. The FTIR spectra of film composites in the amide I, amide II bands and the hydroxyl stretching bands of chitosan have been analyzed. The homogeneity and morphology of chitosan composites were ascertained from tapping-mode atomic force microscopy. The obtained results suggested that there were interactions between chitosan and montmorillonite. The microstructure obtained by AFM microscopy for chitosan and its composites showed that particles are relatively well dispersed in the chitosan matrix.

Download Full-text

SiO2@TiO2/Acrylic Transparent UV Protective Layer for Cool Color Roofing Application

MRS Proceedings ◽

10.1557/opl.2014.339 ◽

2014 ◽

Vol 1641 ◽

Author(s):

Changfeng Chen ◽

Yuliang Wang ◽

Guiquan Pan ◽

Qingwu (King) Wang

Keyword(s):

Surface Modification ◽

Protective Coatings ◽

Protective Layer ◽

Acrylic Resin ◽

Nanocomposite Coating ◽

Uv Protection ◽

Nanoparticle Suspension ◽

Average Size ◽

20 Nm

ABSTRACTTransparent UV protective coatings were developed by incorporating nano-TiO2 into waterborne acrylic systems to provide long-term UV protection for UV sensitive cool color roofing. Water based high crystalline TiO2 nanoparticle suspension was prepared via a gel-sol method at a basic pH. The TiO2 nanoparticles have an average size of 20 nm and are stable against agglomeration. As prepared TiO2 nanosuspension is ready to be well dispersed in commercial waterborne acrylic resin system without extra surface modification. The fabricated TiO2/acrylic nanocomposite coating achieved an UV cut-off below 350 nm with a visible transmission greater than 85% at 700 nm. It is also demonstrated that surface modification of Nano-TiO2 with a SiO2 insulation layer would suppress the catalytic activity of Nano-TiO2 and improve the UV protection for UV and photocatalysis sensitive dyes.

Download Full-text

Preparation of Porous Titanium with High Porous Titanium and Surface Modification with High Concentration Alkaline Treatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.834-836.211 ◽

2013 ◽

Vol 834-836 ◽

pp. 211-214

Author(s):

Xing Ping Fan

Keyword(s):

Surface Modification ◽

Titanium Surface ◽

Alkali Treatment ◽

Alkaline Treatment ◽

Immersion Test ◽

Porous Titanium ◽

Network Structures ◽

High Porosity ◽

High Concentration

Porous titanium scaffolds with high porosity are fabricated by sintering. The bioactivity of the porous titanium has been improved by high concentration alkaline treatment. Through the modification, the titanium surface showed a network structures. The SBF immersion test indicates that apatite was formed on the porous titanium scaffold with high porosity after 10M/L alkali treatment in 12h. The results of study show the network structured endowed the porous titanium with bioactivity.

Download Full-text