Surface modification of purified fly ash and application in polymer

Yang, Yuxiang; Gai, Guo Sheng; Cai, Zhen-Fang; Chen, Qingru

doi:10.1016/j.jhazmat.2005.10.028

Cited by 78 publications

(35 citation statements)

References 13 publications

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“…In recent years, powder surface coating modification technology has developed rapidly and is widely used (Fan et al 2012(Fan et al , 2014(Fan et al , 2015. Yang et al (2006) modified the surface of microbeads in fly ash with a Ca(OH)2 -H2O-CO2 system to increase the surface brightness and roughness. However, because of the different structures of fly ash produced by different factories, the shape of calcium carbonate crystals modified by coating is irregular.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Formulation Control Agent on Brightness of Modified Fly Ash and Its Potential Application in Papermaking

Fan¹,

Song²,

Wang³

et al. 2018

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Different agents were used to control the crystalline morphology of calcium carbonate on the surface of fly ash, which was then used as a papermaking filler in an attempt to improve the utilization rate of fly ash and reduce the dust pollution problem. A mixed solution of calcium hydroxide and fly ash was used as the raw materials, and then three crystal form control agents were tested: (NaPO3)6, ZnCl2, and Na2B4O7·10H2O. A certain amount of carbon dioxide was bubbled into the mixture to form a precipitated calcium carbonate deposit on the surface of fly ash. The calcium carbonate on the fly ash surface was altered by changing the amount of crystal form control agent to determine the best coating effect. The results showed that at the 0.35% ZnCl2 dosage (relative to the theoretical quantity of the calcium carbonate), the surface of the fly ash was uniformly coated with a layer of spherical calcium carbonate crystals and there was a good coating effect. The highest fly ash brightness obtained was 65.3% ISO, and when this fly ash was used as a paper filler, the paper brightness was 75.6% ISO. More importantly, this study demonstrated the potential of fly ash in papermaking.

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Section: Introductionmentioning

confidence: 99%

Effect of the Formulation Control Agent on Brightness of Modified Fly Ash and Its Potential Application in Papermaking

Fan¹,

Song²,

Wang³

et al. 2018

BioResources

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“…In addition, the chemical method to remove iron dissolved the main component of fly ash, which damaged its structure. Yang et al (2006) removed carbon in fly ash via magnetic separation and flotation separation, and the fly ash was modified with chemical deposition in the Ca(OH)2-H2O-CO2 system. This complex process requires a long reaction time and high costs.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Crystal Shape of Precipitated Calcium Carbonate on the Whiteness of Modified Fly Ash

et al. 2016

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Fly ash was modified using calcium oxide and carbon dioxide. The effects of reaction temperature, the rate of carbon dioxide, and the concentration of calcium hydroxide on the crystal shape of precipitated calcium carbonate coated on the surface of fly ash were studied. The effects of the crystal shape of precipitated calcium carbonate on the whiteness of modified fly ash were analyzed. The research showed that the crystal shape of precipitated calcium carbonate was lamellar when the reaction temperature, the rate of carbon dioxide, and the concentration of calcium hydroxide were 20 °C, 0.2 L/min, 20%, respectively, which was conducive to the higher whiteness of modified fly ash.

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“…[6,7] In this investigation we studied the effect of fly ash with three varying particle sizes and concentration on the properties of PTT. Recently many investigators studied the effect of fly ash on the properties of thermoplastics and thermosets [8][9][10][11][12][13][14][15]. Fly ash is the finely divided mineral residue resulting from the burning of pulverised coal in thermal power stations.…”

Section: Introductionmentioning

confidence: 99%

Effect of Particle Size and Concentration of Fly Ash on Properties of Polytrimethylene Terepthalate

2015

International Conference on Chemical, Metallurgy and Material Science Engineering (CMMSE-2015) August 10-11, 2015 Pattaya, Thai

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Surface modification of purified fly ash and application in polymer

Cited by 78 publications

References 13 publications

Effect of the Formulation Control Agent on Brightness of Modified Fly Ash and Its Potential Application in Papermaking

Effect of the Formulation Control Agent on Brightness of Modified Fly Ash and Its Potential Application in Papermaking

Effect of the Crystal Shape of Precipitated Calcium Carbonate on the Whiteness of Modified Fly Ash

Effect of Particle Size and Concentration of Fly Ash on Properties of Polytrimethylene Terepthalate

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