Effect of hydrophobic surface-modified fine aggregates on efflorescence control in geopolymer

Attenuated total reflectance sampling, or waveguide sampling, is commonly used to obtain infrared spectra of aqueous solutions. The detection limits achieved for the determination of organic analytes in aqueous solutions using waveguide sampling are limited by the strong water absorption features and relatively small effective sample thickness due to the short penetration depth of the evanescent wave into the sample. Sol-gel processing has been used to produce a porous silica film on the surface of an infrared waveguide. The surface of the sol-gel film was modified with a silanizing reagent to produce a hydrophobic surface. The resulting waveguide was used to obtain infrared spectra from samples of benzonitrile in water. The benzonitrile spectral features obtained with the modified waveguide are enhanced by more than a factor of 103 when compared with those obtained with an unmodified waveguide.

Download Full-text

Self-Spreading of Lipid Bilayer on a Hydrophobic Surface Made by Self-Assembled Monolayer with Short Alkyl Chain

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2016.12307 ◽

2016 ◽

Vol 16 (4) ◽

pp. 3426-3430

Author(s):

Yuya Omori ◽

Hiroyuki Sakaue ◽

Takayuki Takahagi ◽

Hitoshi Suzuki

Keyword(s):

Fluorescence Microscopy ◽

Lipid Bilayer ◽

Alkyl Chain ◽

Hydrophobic Surface ◽

Bilayer Membrane ◽

The Self ◽

Self Assembled Monolayer ◽

Hydrophobic Region ◽

Hydrophilic Region ◽

Surface Modified

Behaviors of self-spreading of lipid bilayer membrane on a glass surface modified with selfassembled monolayer (SAM) with short alkyl chain were observed with fluorescence microscopy. Hydrophobic surface made by SAM was found to hamper the self-spreading phenomenon but the lipid bilayer spread on a hydrophilic one where SAM was decomposed by oxidation. On a binary surface having a hydrophobic region and a hydrophilic one, the lipid bilayer spread on the hydrophilic region but it stopped at the boundary of the hydrophobic region.

Download Full-text

Stimuli-responsive magneto-/electro-chromatic color-tunable hydrophobic surface modified Fe3O4@SiO2 core–shell nanoparticles for reflective display approaches

RSC Advances ◽

10.1039/c6ra27540k ◽

2017 ◽

Vol 7 (12) ◽

pp. 6988-6993 ◽

Cited By ~ 8

Author(s):

S. Lee ◽

J. Y. Kim ◽

S. Cheon ◽

S. Kim ◽

D. Kim ◽

...

Keyword(s):

Hydrophobic Surface ◽

Stimuli Responsive ◽

Color Gamut ◽

Shell Nanoparticles ◽

Reflective Displays ◽

Color Tunable ◽

Surface Modified ◽

Core Shell Nanoparticles ◽

Reflective Display ◽

Chromatic Color

Magneto-/electro-chromatic reflective color tunability is confirmed using hydrophobic surface modified magnetite nanoparticles. The optical reflective color spectra and color gamut demonstrate the promising applications in reflective displays.

Download Full-text

Performance of rubber mortars containing silica coated rubber

Materiales de Construcción ◽

10.3989/mc.2021.11620 ◽

2021 ◽

Vol 71 (342) ◽

pp. e244

Author(s):

J. Li ◽

P. Chen ◽

H. Cai ◽

Y. Xu ◽

X. Tian ◽

...

Keyword(s):

Absorption Rate ◽

Sol Gel ◽

Silica Coating ◽

Capillary Water ◽

Hydrophobic Properties ◽

Capillary Water Absorption ◽

Fine Aggregates ◽

Rubber Particles ◽

Surface Modified ◽

Mechanical Strengths

This paper investigates the influence of silica coated rubber on the performance of rubber mortars. A classical Stöber sol-gel method is applied to produce a layer of silica coating on rubber particles, which is used to partially replace the fine aggregates in concrete. The effects of the surface-modified rubber particles on the flowability, mechanical strength, capillary water absorption rate, and microstructure of mortars are examined. The results show that the silica coating on the rubber particles reduces the contact angle between the rubber particles from 120° to 103° (i.e., by 17°) and changes the hydrophobic properties from strong hydrophobicity to weak hydrophobicity. The mechanical strengths of mortars are significantly improved by the incorporation of surface-modified rubber particles, i.e., from 41.60% to 44.86% (compressive strength) and from 7.80% to 26.28% (flexural strength). In addition, the incorporation of surface modified rubber particles increases the density of the mortar’s microstructure and enhances the interfaces with its surrounding pastes.

Download Full-text

Superhydrophobic Surface Modified by Sol-Gel Silica Nanoparticle Coating

Materials Science Forum ◽

10.4028/www.scientific.net/msf.960.155 ◽

2019 ◽

Vol 960 ◽

pp. 155-160

Author(s):

Xiao Xing Zhang ◽

Yan Yan Wang ◽

Liang Gu ◽

Zhi Yong Xu ◽

Yan Hua Liu ◽

...

Keyword(s):

Silicon Dioxide ◽

Sol Gel ◽

Silica Nanoparticle ◽

Hydrophobic Surface ◽

Cost Effective ◽

Silica Film ◽

Water Contact ◽

Superhydrophobic Silica ◽

Surface Modified ◽

Surface Fabrication

We reported a superhydrophobic silica-coated surface with a water contact angle of 160° with a 4 μL water droplet, and transparency of 70-86% in the wavelength range of 380-800 nm. The silica film was synthesized at room temperature (22 °C) using sol-gel process by a simple, cost-effective and uniform spin-coating by mixing silicon dioxide sol-gel with γ-(2, 3-epoxypropyloxy) propyltrimethoxysilane (KH-560). The durability of the coating could be effectively enhanced by controlling the ratio of KH-560 and modified silicon dioxide sol-gel. It was believed that this process that we used can hold a great potential in super-hydrophobic surface fabrication.

Download Full-text

Development of novel surface modified phase inversion membranes having hydrophobic surface-modifying macromolecule (nSMM) for vacuum membrane distillation

Desalination ◽

10.1016/j.desal.2010.06.058 ◽

2010 ◽

Vol 261 (3) ◽

pp. 300-312 ◽

Cited By ~ 48

Author(s):

Daniel Eumine Suk ◽

Takeshi Matsuura ◽

Ho Bum Park ◽

Young Moo Lee

Keyword(s):

Phase Inversion ◽

Hydrophobic Surface ◽

Membrane Distillation ◽

Vacuum Membrane Distillation ◽

Surface Modified

Download Full-text

Interfacial photodecompositon of RhB by hydrophobic surface modified core (TiO2)/shell (SiO2) nanoparticles

Materials Letters ◽

10.1016/j.matlet.2013.07.035 ◽

2013 ◽

Vol 109 ◽

pp. 243-246 ◽

Cited By ~ 1

Author(s):

Tao Wang ◽

Qiying Su ◽

Youfeng Xu ◽

Shen Shen ◽

Rong Yang ◽

...

Keyword(s):

Hydrophobic Surface ◽

Sio2 Nanoparticles ◽

Surface Modified ◽

Tio2 Shell

Download Full-text

Curcumin-Loaded Hydrophobic Surface-Modified Hydroxyapatite as an Antioxidant for Sarcopenia Prevention

Antioxidants ◽

10.3390/antiox10040616 ◽

2021 ◽

Vol 10 (4) ◽

pp. 616

Author(s):

Ya-Jyun Liang ◽

I-Hsuan Yang ◽

Yi-Wen Lin ◽

Jhih-Ni Lin ◽

Chang-Chin Wu ◽

...

Keyword(s):

Animal Studies ◽

Early Stage ◽

Hydrophobic Surface ◽

Surface Modifications ◽

Endocytic Pathway ◽

Preventive Strategies ◽

Mass Ratio ◽

Good Biocompatibility ◽

Anti Inflammatory ◽

Surface Modified

Oxidative stress and later-induced chronic inflammation have been reported to play an important role on the progression of sarcopenia. Current treatments for sarcopenia are mainly administered to patients whom sarcopenia already developed. However, there has been no promising results shown in therapy. Therefore, the development of therapeutic and preventive strategies against sarcopenia would be necessary. Curcumin is a traditional medicine that possesses anti-inflammatory and antioxidative properties. In the present study, hydroxyapatite was subjected to hydrophobic surface modifications for curcumin loading (Cur-SHAP). It was, subsequently, utilized for delivery to the patient’s body via intramuscular injection in order to achieve constant release for more than 2 weeks, preventing the progression of the sarcopenia or even leading to recovery from the early stage of the illness. According to the results of WST-1, LIVE/DEAD, DCFDA, and gene expression assays, Cur-SHAP exhibited good biocompatibility and showed great antioxidant/anti-inflammatory effects through the endocytic pathway. The results of the animal studies showed that the muscle endurance, grip strength, and fat/lean mass ratio were all improved in Cur-SHAP-treated rats from LPS-induced sarcopenia. In summary, we successfully synthesized hydrophobic surface modification hydroxyapatite for curcumin loading (Cur-SHAP) and drug delivery via the IM route. The LPS-induced sarcopenia rats were able to recover from disease after the Cur-SHAP treatment.

Download Full-text

Analytical Electron Microscopy of Surface-Modified Ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100118291 ◽

1985 ◽

Vol 43 ◽

pp. 276-279

Author(s):

P. S. Sklad

Keyword(s):

Electron Microscopy ◽

Analytical Electron Microscopy ◽

Theoretical Models ◽

Ceramic Materials ◽

Solute Concentration ◽

Second Phase ◽

Analytical Electron ◽

Implantation Techniques ◽

Lattice Damage ◽

Surface Modified

Over the past several years, it has become increasingly evident that materials for proposed advanced energy systems will be required to operate at high temperatures and in aggressive environments. These constraints make structural ceramics attractive materials for these systems. However it is well known that the condition of the specimen surface of ceramic materials is often critical in controlling properties such as fracture toughness, oxidation resistance, and wear resistance. Ion implantation techniques offer the potential of overcoming some of the surface related limitations.While the effects of implantation on surface sensitive properties may be measured indpendently, it is important to understand the microstructural evolution leading to these changes. Analytical electron microscopy provides a useful tool for characterizing the microstructures produced in terms of solute concentration profiles, second phase formation, lattice damage, crystallinity of the implanted layer, and annealing behavior. Such analyses allow correlations to be made with theoretical models, property measurements, and results of complimentary techniques.

Download Full-text