In situ and one-step synthesis of hydrophobic zinc borate nanoplatelets

Tian, Yumei; He, Yuehui; Yu, Lianxiang; Deng, Yanhui; Zheng, Yangong; Sun, Fangfang; Liu, Zhihui; Wang, Zichen

doi:10.1016/j.colsurfa.2007.06.029

Cited by 38 publications

(17 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The probable dehydration reaction is given in eqn. (6). Table 3 provides the initial temperature (T i ), peak temperature (T p ) and final temperature (T f ) values along with weight losses (Δm) calculated from the TG, DTG and DTA data.…”

Section: Zinc Borate Thermal Dehydration Resultsmentioning

confidence: 99%

“…In the study of Ersan et al, 23 we determined the optimum molar ratio of ZnO and H 3 BO 3 , which forms the basis of this study. In the study of Vardar et al, we determined the optimum molar ratio of Zn 5 (CO 3 ) 2 · (OH) 6 and H 3 BO 3 . 24 Thermal decomposition of metal borates usually includes dehydration as a consequence of removing the water of crystallization from the main structure.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, zinc borates are used as an additive in the polymer, coating and pigment industries due to their smoke suppressing and anticorrosive properties. [1][2][3][4][5][6][7][8] Because of their potential use in many industrial applications, in the last decade, several studies were carried out to produce zinc borate from different precursors and using a variety of methods. Sawada et al studied the synthesis of ZB in a two-step reaction of zinc oxide (ZnO) and boric acid (H 3 BO 3 ) at 60 °C for 1.5 h to form crystals, followed by heating to 90 °C for 4 h to enhance crystal growth.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Synthesis of Zinc Borates from a Zinc Oxide Precursor via Ultrasonic Irradiation

Ersan

Yıldırım

Kıpçak

et al. 2016

ACSi

View full text Add to dashboard Cite

In this study, zinc borate hydrate (Zn 3 B 6 O 12 · 3.5H 2 O) was synthesized from zinc oxide (ZnO) and boric acid (H 3 BO 3 ) via a novel method of ultrasonic irradiation. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR) and Raman spectroscopy were used to characterize the synthesized products. Scanning electron microscopy (SEM) was used to determine the effects of reaction time and reaction temperature on the morphology of the products. Thermal dehydration kinetics were studied using thermal gravimetry and differential thermal gravimetry analysis (TG/DTA). The Doyle and Kissinger non-isothermal kinetic methods were used to analyse the TG/DTA data. The XRD results confirmed the successful synthesis of Zn 3 B 6 O 12 · 3.5H 2 O at a range of reaction temperatures and times. Additionally, FT-IR and Raman analysis of the products identified peaks specific to zinc borate. Using the methods of Doyle and Kissinger, the activation energies of thermal dehydration of zinc borate were found to be 341.61 kJ/mol and 390.17 kJ/mol, respectively.

show abstract

Section: Zinc Borate Thermal Dehydration Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Synthesis of Zinc Borates from a Zinc Oxide Precursor via Ultrasonic Irradiation

Ersan

Yıldırım

Kıpçak

et al. 2016

ACSi

View full text Add to dashboard Cite

show abstract

“…The interest in the production of zinc borate has steadily grown because of the great expectations for the applications including polymer additive as flame retardants, the preservative in wood composites and additive for lubrication [1][2][3][4][5]. There have been different crystalline forms of hydrated zinc borate which can be prepared selectively using either borax and soluble zinc salt or boric acid and zinc oxide.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of zinc borate by inverse emulsion technique for lubrication

Savrık

Balköse

Ülkü

2010

J Therm Anal Calorim

View full text Add to dashboard Cite

Lubricating oil additives based on boron compounds are promising materials for lubrication due to their tribological advantages such as antiwear efficiency, good film strength, and high temperature resistance. This article deals with the preparation of zinc borate particles that are well dispersed and colloidally stabilized in mineral oil. This method starts with preparing two inverse emulsions (water-in-oil) with sorbitan monostearate (Span 60) as a surfactant, light neutral oil as a continuous phase, and the aqueous solutions of borax decahydrate (Na 2 B 4 O 7 Á10H 2 O) and zinc nitrate (Zn(NO 3 ) 2 Á6H 2 O) as the dispersed phases. The produced particles were zinc borate crystals having both rod-like and spherical morphologies, and the diameters of spherical particles were changing between 20 and 30 nm. FTIR spectra of the obtained particles showed the characteristic peaks of trihedral borate (B(3)-O) and tetrahedral borate (B(4)-O) groups as well as the specific peaks of the sorbitan monostearate. TG showed 30.42% and 22.08% mass loss at 600°C for the samples prepared by inverse emulsion and precipitation techniques, respectively. The endothermic peak at 50°C is observed due to the melting of sorbitan monostearate and the heat of melting is evaluated as -3.50 J/g. Tribological studies revealed that sorbitan monostearate not only outperformed as a dispersing agent of inorganic particles, but also it proved to be an anti-wear agent. Zinc borate produced by precipitation decreased the wear scar diameter from 1.402 to 0.639 mm and the friction coefficient from 0.099 to 0.064. The inverse emulsion was effective in decreasing wear scar diameter and the friction coefficient by lowering them to 0.596 and 0.089 mm, respectively.

show abstract

“…8,9 For instance, Tian and co-workers produced zinc borate nanodiscs from borax and zinc sulfate in the presence of oleic acid as a modifying agent. 9 The produced nanodiscs were used as lubricating oil additive and they decreased friction coefficient value from 0.12 to 0.02.…”

Section: Introductionmentioning

confidence: 99%

Supercritical Carbon Dioxide Drying of Methanol−Zinc Borate Mixtures

Gönen

Balköse

Gupta

et al. 2009

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Supercritical carbon dioxide (CO 2 ) drying of zinc borate species was investigated to evaluate possible chemical alterations in the product during the drying. Methanol-wetted zinc borates produced either from borax decahydrate and zinc nitrate hexahydrate (2ZnO · 3B 2 O 3 · 7H 2 O) or from zinc oxide and boric acid (2ZnO · 3B 2 O 3 · 3H 2 O) were dried by both conventional and supercritical carbon dioxide drying methods. Zinc borate samples dried by both techniques were characterized using analytical titration, X-ray powder diffraction (XRD), thermo gravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, elemental analysis, and scanning electron microscopy (SEM). It was found that while zinc borate obtained from zinc oxide and boric acid did not have any chemical interaction with CO 2 , carbonates were formed on the surface of zinc borate obtained from borax decahydrate and zinc nitrate hexahydrate. The main factor for the carbonate formation during supercritical CO 2 drying is anticipated as the structural differences of zinc borate species. CO 2 is a nonpolar solvent, and it does not usually react with polar substances unless water is present in the medium. While 2ZnO · 3B 2 O 3 · 3H 2 O had three bound OH groups, 2ZnO · 3B 2 O 3 · 7H 2 O had five bound OH groups and one mole of water of crystallization. It is proposed that the water of crystallization reacts with CO 2 forming carbonic acid. Then, carbonic acid, which is stronger than boric acid, substitutes borate ions from their zinc salts.

show abstract

In situ and one-step synthesis of hydrophobic zinc borate nanoplatelets

Cited by 38 publications

References 14 publications

A Novel Synthesis of Zinc Borates from a Zinc Oxide Precursor via Ultrasonic Irradiation

A Novel Synthesis of Zinc Borates from a Zinc Oxide Precursor via Ultrasonic Irradiation

Synthesis of zinc borate by inverse emulsion technique for lubrication

Supercritical Carbon Dioxide Drying of Methanol−Zinc Borate Mixtures

Contact Info

Product

Resources

About