Surface modification of nano-alumina and its application in preparing polyacrylate water-based wood coating

2013 ◽  
Vol 33 (8) ◽  
pp. 767-774 ◽  
Author(s):  
Ling Long ◽  
Jianfeng Xu ◽  
Xianglong Wan ◽  
Lei Qian
Keyword(s):  
Surface Modification ◽  
Abrasion Resistance ◽  
High Performance ◽  
Ionic Surfactant ◽  
Coating Film ◽  
Wood Coating ◽  
Nano Alumina ◽  
Water Based ◽  
Mixing Method ◽  
Modified Surface

Abstract In order to solve weakness, undesirable abrasion resistance, and hardness of a water-based wood coating film, modified surface nano-alumina was made in the water-based wood coating. The effect of surfactant type and amount on the performance of nano-alumina slurry was investigated. How the performance of the polyacrylate wood coating was affected by the size, amount, and mixing method of nano slurry was studied, as well as the characterization of nano-alumina slurry and modified polyacrylate wood coating. The results showed that, by compounding the non-ionic surfactant polyoxyethylene octylphenol ether (OPEO) and anionic surfactant sodium polyacrylate of surface modification of nano-alumina, the nano-alumina slurry had excellent performance and good stability when the amount of nano-alumina was 0.6 wt% and 3.2 wt%, respectively. When 1.5 wt% of nano slurry was mixed with the water-based polyacrylate emulsion to a hybrid during the pre-emulsification phase, the wood coating film had high performance, and good abrasion resistance and hardness.

Interfacial Improvement of Nanophased Jute-Based Green Composite by Surface Modification

2010 ◽  
Author(s):  
Mohammad K. Hossain ◽  
Mohammad W. Dewan ◽  
Muhammad E. Hossain ◽  
Mahesh Hosur ◽  
Shaik Jeelani
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
High Performance ◽  
Green Composite ◽  
Solution Intercalation ◽  
Chemical Treatments ◽  
Jute Fibers ◽  
Acetic Acid Treatment ◽  
Modified Surface ◽  
Jute Fabrics

The extensive research efforts are currently on progress all over the world to develop and characterize the green composites with high performance at an affordable cost due to the growing environmental awareness. Biodegradable nanophased jute composites were manufactured using chemically treated jute fabrics, Biopol, and nanoclay using compression molding techniques for this study. Nanoclay infusion into the thermoplastic is a challenging issue and was infused using solution intercalation technique. The surface modification of jute fibers was accomplished by performing subsequent chemical treatments such as detergent washing, dewaxing, alkali and acetic acid treatment. The morphology of the modified surface was studied using SEM and FTIR. Thermal performance of the treated fibers was studied using the TGA. The thermal, dynamic mechanical and mechanical properties of biodegradable nanophased jute composites were evaluated by TGA, DMA and flexure test respectively. Enhanced thermal and mechanical properties were observed in modified and nanophased jute biopol composites.

Surface Modification of Nano-Titanium and its Effect on the Antibacterial Property of Waterborne Wood Coating

2014 ◽  
Vol 609-610 ◽  
pp. 88-93
Author(s):  
Lei Qian ◽  
Ling Long ◽  
Jian Feng Xu
Keyword(s):  
Surface Modification ◽  
Treatment Time ◽  
Antibacterial Property ◽  
Antibacterial Properties ◽  
Sodium Polyacrylate ◽  
Optimum Conditions ◽  
Wood Coating ◽  
Excellent Performance ◽  
Water Based ◽  
Made In

In the paper, the surface modification of nanotitanium and its effect on the antibacterial properties of waterborne wood coating were studied. The effect of the type and amount of surfactant (system) and the ultrasonic treatment time on the property of nanotitanium and the effect of the dosage and adding method of nanoslurry on the properties of water-based wood coating were both investigated. The nanotitanium slurry made in the optimum conditions was also characterized. The results showed that nanotitanium slurry with excellent performance was obtained when 0.5wt% polyoxyethylene octylphenol ether and 3wt% sodium polyacrylate were used and ultrasonic treated 5h. It also showed that the waterborne wood coating with excellent drying performance and antibacterial property was got when 1.5wt % nanoslurry was mixed to water-based emulsion to hybrid. Under the conditions, the antibacterial rate against Escherichia coil and Staphlococcus aureus reaches to 95%.

scholarly journals Abrasion Resistance of Ultra-High-Performance Concrete for Railway Sleepers

2021 ◽  
Author(s):  
Ariful Hasnat ◽  
Nader Ghafoori
Keyword(s):  
Prestressed Concrete ◽  
Abrasion Resistance ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Positive Influence ◽  
Cementitious Material ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Ultra High Performance Concrete

AbstractThis study aimed to determine the abrasion resistance of ultra-high-performance concretes (UHPCs) for railway sleepers. Test samples were made with different cementitious material combinations and varying steel fiber contents and shapes, using conventional fine aggregate. A total of 25 UHPCs and two high-strength concretes (HSCs) were selected to evaluate their depth of wear and bulk properties. The results of the coefficient of variation (CV), relative gain in abrasion, and abrasion index of the studied UHPCs were also obtained and discussed. Furthermore, a comparison was made on the resistance to wear of the selected UHPCs with those of the HSCs typically used for prestressed concrete sleepers. The outcomes of this study revealed that UHPCs displayed excellent resistance against abrasion, well above that of HSCs. Amongst the utilized cementitious material combinations, UHPCs made with silica fume as a partial replacement of cement performed best against abrasion, whereas mixtures containing fly ash showed the highest depth of wear. The addition of steel fibers had a more positive influence on the abrasion resistance than it did on compressive strength of the studied UHPCs.

Mussel-inspired surface functionalization of porous carbon nanosheets using polydopamine and Fe3+/tannic acid layers for high-performance electrochemical capacitors

2017 ◽  
Vol 5 (48) ◽  
pp. 25368-25377 ◽  
Author(s):  
Yeong A. Lee ◽  
Jiyoung Lee ◽  
Dae Wook Kim ◽  
Chung-Yul Yoo ◽  
Sang Hyun Park ◽  
...  
Keyword(s):  
Surface Modification ◽  
Tannic Acid ◽  
Surface Functionalization ◽  
Porous Carbon ◽  
High Performance ◽  
Electrochemical Capacitors ◽  
Carbon Nanosheets

The mussel-inspired surface modification for high-performance electrochemical capacitors is demonstrated.

scholarly journals Preparation of high-performance toluene adsorbents by sugarcane bagasse carbonization combined with surface modification

RSC Advances ◽  
2020 ◽  
Vol 10 (40) ◽  
pp. 23749-23758
Author(s):  
Yu Wang ◽  
Wangsheng Chen ◽  
Bo Zhao ◽  
Huaqin Wang ◽  
Linbo Qin ◽  
...  
Keyword(s):  
Surface Modification ◽  
Sugarcane Bagasse ◽  
High Performance ◽  
Activated Carbons ◽  
Excellent Performance

A series of activated carbons were prepared by carbonizing sugarcane bagasse combined with surface modification, which showed an excellent performance of adsorbing toluene (522 mg g−1 at 30 °C).

Solution to Inverse Problem of Manufacturing by Surface Modification With Controllable Surface Integrity Correlated to Performance: A Case Study of Thermally Sprayed Coatings for Wear Performance

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
X. P. Zhu ◽  
P. C. Du ◽  
Y. Meng ◽  
M. K. Lei ◽  
D. M. Guo
Keyword(s):  
Inverse Problem ◽  
Surface Modification ◽  
Surface Integrity ◽  
High Performance ◽  
Surface Characteristics ◽  
Spray Angle ◽  
Functional Surface ◽  
Machining Processes ◽  
Wear Performance ◽  
Surface Features

Inverse problem of manufacturing is studied under a framework of high performance manufacturing of components with functional surface layer, where controllable generation of surface integrity is emphasized due to its pivotal role determining final performance. Surface modification techniques capable of controlling surface integrity are utilized to verify such a framework of manufacturing, by which the surface integrity desired for a high performance can be more effectively achieved as reducing the material and geometry constraints of manufacturing otherwise unobtainable during conventional machining processes. Here, thermal spraying of WC–Ni coatings is employed to coat stainless steel components for water-lubricated wear applications, on which a strategy for direct problem from process to performance is implemented with surface integrity adjustable through spray angle and inert N2 shielding. Subsequently, multiple surface integrity parameters can be evaluated to identify the major ones responsible for wear performance by elucidating the wear mechanism, involving surface features (coating porosity and WC phase retention) and surface characteristics (microhardness, elastic modulus, and toughness). The surface features predominantly determine tribological behaviors of coatings in combination with the surface characteristics that are intrinsically associated with the surface features. Consequently, the spray process with improved N2 shielding is designed according to the desired surface integrity parameters for higher wear resistance. It is demonstrated that the correlations from processes to performance could be fully understood and established via controllable surface integrity, facilitating solution to inverse problem of manufacturing, i.e., realization of a material and geometry integrated manufacturing.

scholarly journals The effect of the surface modification of carbon nanotubes on their dispersion in the epoxy matrix

2011 ◽  
Vol 13 (2) ◽  
pp. 62-69 ◽  
Author(s):  
Maria Wladyka-Przybylak ◽  
Dorota Wesolek ◽  
Weronika Gieparda ◽  
Anna Boczkowska ◽  
Ewelina Ciecierska
Keyword(s):  
Carbon Nanotubes ◽  
Surface Modification ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Mechanical Mixing ◽  
Weight Percentage ◽  
Homogeneous Dispersion ◽  
Multi Walled Carbon Nanotubes ◽  
Mixing Method ◽  
Walled Carbon Nanotubes

The effect of the surface modification of carbon nanotubes on their dispersion in the epoxy matrix Functionalization of multi-walled carbon nanotubes (MWCNTs) has an effect on the dispersion of MWCNT in the epoxy matrix. Samples based on two kinds of epoxy resin and different weight percentage of MWCNTs (functionalized and non-functionalized) were prepared. Epoxy/carbon nanotubes composites were prepared by different mixing methods (ultrasounds and a combination of ultrasounds and mechanical mixing). CNTs modified with different functional groups were investigated. Surfactants were used to lower the surface tension of the liquid, which enabled easier spreading and reducing the interfacial tension. Solvents were also used to reduce the liquid viscosity. Some of them facilitate homogeneous dispersion of nanotubes in the resin. The properties of epoxy/nanotubes composites strongly depend on a uniform distribution of carbon nanotubes in the epoxy matrix. The type of epoxy resin, solvent, surfactant and mixing method for homogeneous dispersion of CNTs in the epoxy matrix was evaluated. The effect of CNTs functionalization type on their dispersion in the epoxy resins was evaluated on the basis of viscosity and microstructure studies.

Clindamycin-loaded titanium prevents implant-related infection through blocking biofilm formation

2021 ◽  
pp. 088532822110511
Author(s):  
Youbin Li ◽  
Shaochuan Wang ◽  
Shidan Li ◽  
Jun Fei
Keyword(s):  
Surface Modification ◽  
Rat Model ◽  
Biofilm Formation ◽  
High Performance ◽  
Bacterial Colonization ◽  
Tissue Homogenate ◽  
Tartrate Resistant Acid Phosphatase ◽  
Layer By Layer

Implant-related infection is a disastrous complication. Surface modification of titanium is considered as an important strategy to prevent implant-related infection. However, there is no recognized surface modification strategy that can be applied in clinic so far. We explored a new strategy of coating. The clindamycin-loaded titanium was constructed by layer-by-layer self-assembly. The release of clindamycin from titanium was detected through high performance liquid chromatography. Different titanium was co-cultured with Staphylococcus aureus for 24 h in vitro, then the effect of different titanium on bacterial colonization and biofilm formation was determined by spread plate method and scanning electron microscopy. Cytotoxicity and cytocompatibility of clindamycin-loaded titanium on MC3T3-E1 cells were measured by CCK8. The antibacterial ability of clindamycin-loaded titanium in vivo was also evaluated using a rat model of osteomyelitis. The number of osteoclasts in bone defect was observed by tartrate-resistant acid phosphatase staining. Bacterial burden of surrounding tissues around the site of infection was calculated by tissue homogenate and colony count. Clindamycin-loaded titanium could release clindamycin slowly within 160 h. It reduced bacterial colonization by three orders of magnitude compare to control ( p < .05) and inhibits biofilm formation in vitro. Cells proliferation and adhesion were similar on three titanium surfaces ( p > .05). In vivo, clindamycin-loaded titanium improved bone healing, reduced microbial burden, and decreased the number of osteoclasts compared control titanium in the rat model of osteomyelitis. This study demonstrated that clindamycin-loaded titanium exhibited good biocompatibility, and showed antibacterial activity both in vivo and in vitro. It is promising and might have potential for clinical application.

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