The effect of acrylamides copolymers on the stability and rheological properties of yellow iron oxide dispersion

Liang, Caizhen; Wang, Bin; Chen, Jianjun; Huang, Y.; Fang, Tianyong; Wang, Yingying; Liao, Bing

doi:10.1016/j.colsurfa.2016.10.020

Cited by 11 publications

(6 citation statements)

References 39 publications

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“…In order to improve the heat resistance and dispersibility properties of iron oxide yellow pigments, many basic studies have been reported 9,10 . Our group also reported the iron oxide yellow pigments were coated with the aluminum‐containing material to improve its heat resistance 11 .…”

Section: Introductionmentioning

confidence: 93%

Surface analysis of stearic acid modification for improving thermal resistant of calcium phosphate coated iron oxide yellow pigments

Pan

Cao

et al. 2020

Surface & Interface Analysis

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In order to widen the application of iron oxide yellow pigments (α‐FeOOH) in high temperature industry, α‐FeOOH coated with calcium phosphate (α‐FeOOH/Ca) were modified with stearic acid (Sa) through dry process. Scanning electron microscope (SEM), transmission electron microscope (TEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), X‐ray photoelectron spectroscopy (XPS), and thermogravimetry (TG) were employed to characterize the effect of surface modification. The effects of Sa dosage on the thermal resistance of α‐FeOOH/Ca after modification were also discussed. The crystal structure of α‐FeOOH/Ca does not change after modification with Sa, but the ratio of length to diameter about α‐FeOOH/Ca is smaller. Sa can react with α‐FeOOH/Ca in the form of –COOCa and HPO42− based on FT‐IR and XPS analyses. TG‐DTG results suggest that calcium phosphate and Sa improve the thermal stability of α‐FeOOH. The value of color difference of modified α‐FeOOH/Ca first decrease and then increase with increasing of Sa dosage, which is studied by CIE ΔL, Δa, and Δb colorimetric analyses. The amount of Sa affects the thermal resistance and dispersion performance of α‐FeOOH/Ca simultaneously; also the relationship between thermal resistance and dispersion is inversely proportional. Experimental characterizations reveal that introduction of the phosphates and Sa not only prevents the loss of water on the surface of α‐FeOOH but improve its activation index and dispersibility in organic solvents.

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Section: Introductionmentioning

confidence: 93%

Surface analysis of stearic acid modification for improving thermal resistant of calcium phosphate coated iron oxide yellow pigments

Pan

Cao

et al. 2020

Surface & Interface Analysis

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“…Yellow iron oxide: Liang et al found that yellow iron oxide has been used as a colouring material in cosmetics because of its free toxicity, chemical stability and low cost. Its rheological measurements were studied which includes shear rate, shear stress and viscosity.…”

Section: Introductionmentioning

confidence: 99%

Designing high‐performance colour cosmetics through optimization of powder flow characteristics

Liu

Drakontis

Amin

2020

Intern J of Cosmetic Sci

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Objective Explore the impact of powder flow properties such as flow energy and compressibility on the performance characteristics of foundation powders such as cake strength and pay‐off. Methods FT4 Powder Rheometer from Freeman Technology was utilized to explore various powder compositions. The three major tests performed were flowability test, compressibility test and shear cell test. Results The results highlight that the sample which has higher compressibility has the better cake strength, and the sample which requires lower total energy has better pay‐off. Particles or samples with lower total flow energy, should have easier flow, therefore, should have better pay‐off. Samples and components with higher compressibility, should hold the structure better, therefore, should have better cake strength. Talc has the highest compressibility and lowest flow energy. Foundation sample 5 has the highest concentration of talc and also has the best performance. Conclusion The lower the total flow energy, the easier it is for the powder to flow, and have better pay‐off. Powder compressibility correlates with cake strength which means that a sample with better compressibility consequently has the better cake strength. Samples 5 and 10 require less total flow energy, have lower shear stress, and higher compressibility, therefore, have better final performance. Both samples 5 and 10 have higher talc concentrations compared to other formulations.

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“…As a practical technique, researchers have come up with the coating method to give the NPs with a protective layer [ 12 ]. Hyperbranched polymer is considered as a kind of effective coating material.…”

Section: Introductionmentioning

confidence: 99%

Modified Hyperbranched Polyglycerol as Dispersant for Size Control and Stabilization of Gold Nanoparticles in Hydrocarbons

Shen

Guo

et al. 2017

Nanoscale Res Lett

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Hyperbranched polyglycerol (HPG) is modified with dodecanethiol (DS) via the “thiol−ene” click reaction to obtain an amphiphilic product DSHPG. The molecular structures of DSHPG samples are characterized by NMR, FTIR, and GPC, and the thermal behaviors are characterized by DSC and TGA. Gold nanoparticles (Au NPs) are prepared with DSHPG as the stabilizer and surface-modification reagent. The size of Au NPs can be tuned by changing the molecular weight of HPG. It is observed that the HPG molecular weights of 1123, 3826, and 55,075 lead to the NP diameters of 4.1 nm for Au@DSHPG-1, 9.7 nm for Au@DSHPG-2, and 15.1 nm for Au@DSHPG-3, respectively. The morphology and size of Au NPs are characterized by TEM and DLS. Especially, the dispersion abilities of Au NPs in different pure solvents and co-solvent mixtures are investigated. The long alkyl chains on DSHPG give the ability of Au NPs to be well dispersed in nonpolar solvents. Hydrocarbon-based nanofluids can be obtained from the hydrophobic Au NPs dispersed into a series of hydrocarbons. The dispersion stability for Au NPs in hydrocarbons is monitored by UV-Vis spectroscopy, and the relative concentration of Au NPs is observed to still maintain over 80% after 3600 h.

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The effect of acrylamides copolymers on the stability and rheological properties of yellow iron oxide dispersion

Cited by 11 publications

References 39 publications

Surface analysis of stearic acid modification for improving thermal resistant of calcium phosphate coated iron oxide yellow pigments

Surface analysis of stearic acid modification for improving thermal resistant of calcium phosphate coated iron oxide yellow pigments

Designing high‐performance colour cosmetics through optimization of powder flow characteristics

Modified Hyperbranched Polyglycerol as Dispersant for Size Control and Stabilization of Gold Nanoparticles in Hydrocarbons

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