Acid and alkali resistance of Acrylic polyurethane/R-SiO2
 nanocomposite coating

The silver particles were grown in situ on the surface of wood by the silver mirror method and modified with stearic acid to acquire a surface with superhydrophobic and antibacterial properties. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray energy spectroscopy (XPS) were used to analyze the reaction mechanism of the modification process. Scanning electron microscopy (SEM) and contact angle tests were used to characterize the wettability and surface morphology. A coating with a micro rough structure was successfully constructed by the modification of stearic acid, which imparted superhydrophobicity and antibacterial activity to poplar wood. The stability tests were performed to discuss the stability of its hydrophobic performance. The results showed that it has good mechanical properties, acid and alkali resistance, and UV stability. The durability tests demonstrated that the coating has the function of water resistance and fouling resistance and can maintain the stability of its hydrophobic properties under different temperatures of heat treatment.

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Analysis of the acid and alkali resistance of superhydrophobic paper mulch

Cellulose ◽

10.1007/s10570-021-04065-5 ◽

2021 ◽

Author(s):

Fangyuan Zhang ◽

Anling Li ◽

Wuyun Zhao

Keyword(s):

Alkali Resistance ◽

Acid And Alkali Resistance ◽

Superhydrophobic Paper

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Synergistic effect of (3-Aminopropyl)Trimethoxysilane treated ZnO and corundum nanoparticles under UV-irradiation on UV-cutoff and IR-absorption spectra of acrylic polyurethane based nanocomposite coating

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2018.11.009 ◽

2019 ◽

Vol 159 ◽

pp. 205-216 ◽

Cited By ~ 11

Author(s):

Mhd Abd Cader Mhd Haniffa ◽

Yern Chee Ching ◽

Cheng Hock Chuah ◽

Kuan Yong Ching ◽

Nai-Shang Liou

Keyword(s):

Synergistic Effect ◽

Absorption Spectra ◽

Uv Irradiation ◽

Nanocomposite Coating ◽

Ir Absorption ◽

Ir Absorption Spectra ◽

Acrylic Polyurethane

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Application of Inorganic Ceramic Membrane in Wastewater Treatment I: Process Research and Parameter Optimization

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.454.158 ◽

2013 ◽

Vol 454 ◽

pp. 158-162 ◽

Cited By ~ 1

Author(s):

Guo Yi Li ◽

Xiao Hui Wang ◽

Yan Jie Wei

Keyword(s):

Ceramic Membrane ◽

High Strength ◽

Research Direction ◽

Research Field ◽

Alkali Resistance ◽

Future Research ◽

Chemical Additives ◽

Mechanical Metallurgy ◽

Acid And Alkali Resistance ◽

Automation Control

Inorganic ceramic membrane has been one of the hottest research field both in environmental protection and materials, as it has so much advantages, such as, high-temperature-resistance ,acid and alkali-resistance , adequate distribution of aperture , steady chemical property , high strength , large flux, long lifetime, anti-pollution, simple structure, small footprint, few corollary equipment, easy installation, no chemical additives, high separating efficiency, high degree of automation control and so on. Some application on environmental progress in the field of inorganic ceramic membrane technology applied in treatment of food industry wastewater, mechanical metallurgy wastewater and petrochemical wastewater was summarized in this paper, and the existent problems and the future research direction was discussed.

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Enhancement the Properties of Construction Urea Composition with Polymer Additive

International Journal of Community Service & Engagement ◽

10.47747/ijcse.v2i2.238 ◽

2021 ◽

Vol 2 (2) ◽

pp. 1-8

Author(s):

Arslanov Islom Kimsanovich

Keyword(s):

Structure Formation ◽

Building Materials ◽

Chemical Resistance ◽

Adhesive Bond ◽

Alkali Resistance ◽

Scientific Article ◽

Strength Increase ◽

Polymer Additive ◽

Water Binding ◽

Acid And Alkali Resistance

This scientific article provides physicochemical studies where the addition of a gel polymer has a positive effect on the process of structure formation. The presence of chemical bonds between the components, a change in the morphology of the structure, a decrease in microporosity, an increase in the density and thermal stability of the urea composition are shown. Polymer composite materials are used as chemically resistant coatings, polymer mortars and polymer concretes. Along with such valuable properties as incombustibility, colorlessness, good miscibility with water, etc., urea resins and compositions based on them have a number of disadvantages. The object of the study is a carbamide composition with a quartz filler and an addition of a gel polymer, its structure formation and chemical resistance. The methodological basis of the study is the polystructural theory of composite building materials (CBM) and the modeling of the study of the chemical resistance of the urea composition in aggressive conditions. The issues of finding effective water-binding additives and studying their effect on structure formation, properties and technology of urea compositions remain relevant and require additional research. It is shown that with the optimal content of the gel-polymer additive in the composition of 0.13% of the filler weight, the compressive strength and specific impact strength increase by 17; 13% and shrinkage is reduced by 7%. It was found that due to the enhancement of the adhesive bond between the components and the improvement of the pore structure under the action of the gel-polymer additive, the chemical resistance of the urea composition with quartz filler increases. So, water, acid and alkali resistance are 0.75; 0.80 and 0.85 and which, respectively, are 6, 7 and 7 points higher than the reference composition.

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Isolation of Xylanase Producing Strains, Optimization of Fermentation Conditions and Research on Enzymatic Properties

Journal of Biology and Life Science ◽

10.5296/jbls.v12i2.18483 ◽

2021 ◽

Vol 12 (2) ◽

pp. 1

Author(s):

Ji Huilong ◽

Gao Xin ◽

WU Wenxuan ◽

Ma Zhuang ◽

Qing Qing

Keyword(s):

Enzyme Activity ◽

Specific Activity ◽

Ph Value ◽

Fermentation Broth ◽

Sodium Dodecyl ◽

Alkali Resistance ◽

Initial Ph ◽

Acid And Alkali Resistance ◽

Optimal Reaction Temperature ◽

Optimization Of Fermentation

In this study, we successfully isolated a strain of Aspergillus oryzae TR08, which produced xylanase secreted to the outside of the cell productively. The enzyme activity and specific activity in the fermentation broth of this strain reached peak values of 451 IU/mL and 1963 IU/mg after 156 h of fermentation. A single factor experiment was designed, and it was found that the strain was adjusted to the initial pH of the fermentation broth to 7.5 in a shaker at 180 rpm and 32 °C. After 156 h of fermentation, the enzyme activity reached a maximum of 1264 IU/mL. The optimal reaction temperature and pH value of the xylanase were 55 °C and 7.5, respectively, and it had excellent acid and alkali resistance and a wide pH activity range. The xylanase was increased the catalytic activity by 15% in 0.25 mM Fe3+, and the biological activity of the enzyme was not affected in the sodium dodecyl sulfate environment.

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In situ formation of Fe3O4/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

RSC Advances ◽

10.1039/d0ra06338j ◽

2020 ◽

Vol 10 (51) ◽

pp. 30443-30450

Author(s):

Qilong Sun ◽

Yue Ji ◽

LiFen He ◽

Xiaoyun Long

Keyword(s):

Carbon Fiber ◽

Carbon Coating ◽

High Strength ◽

Alkali Resistance ◽

Wave Absorption ◽

Military Equipment ◽

Acid And Alkali Resistance ◽

Absorbing Material ◽

In Situ Formation

Carbon fiber is an absorbing material with high strength, acid and alkali resistance, high temperature resistance, flexibility, and processability and plays an important role in the electromagnetic (EM) wave absorption of civil buildings and military equipment.

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