A comparative study of different natural palygorskite clays for fabricating cost-efficient and eco-friendly iron red composite pigments

Lu, Yushen; Dong, Wei; Wang, Wenbo; Wang, Qin; Hui, Aiping; Wang, Aiqin

doi:10.1016/j.clay.2018.10.008

Cited by 51 publications

(11 citation statements)

References 66 publications

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“…Figure 2A is the XRD patterns of Pal, Cur/Pal and the corresponding metal ions-Cur/Pal hybrid materials. The characteristic diffraction peaks of Pal crystal have been determined from the diffractograms, which was consistent with those reported in the literatures ( Li et al, 2019a ; Lu et al, 2019 ). In addition, small amounts of quartz in Pal had been found.…”

Section: Resultssupporting

confidence: 89%

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Yan

et al. 2021

Front. Chem.

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Curcumin is one of the dietary dyes extracted from turmeric and used for prevention and treatment of various illnesses. However, the low bioavailability and poor stability of curcumin limits its relevant applications. Therefore, different metal ions including Cu2+, Zn2+, Mg2+, Al3+, or Fe3+ were incorporated to tune the color, enhance the environmental stability and antioxidant activity of curcumin in the presence of palygorskite in this study. The as-prepared samples were studied using X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, Zeta potential, and transmission electron microscopy. In addition, the density functional theory calculation was also performed to explore the possible interaction among metal ions, curcumin and palygorskite. It was found that the color changing and stability enhancing were ascribed to the curcumin-metal ions coordination as well as chemical interactions between curcumin-metal complex and palygorskite. Moreover, the as-prepared composites showed more excellent color, thermal stability, antioxidant activity, and fluorescence properties than that of the curcumin/palygorskite composites due to the presence of metal ions. The finding of this investigation may contribute to developing the multifunctional composites with different colors and good antioxidant activity for relevant applications based on curcumin and palygorskite.

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Section: Resultssupporting

confidence: 89%

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Yan

et al. 2021

Front. Chem.

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“…Therefore, biohybrid compounds that combine these biomolecules and an inorganic substrates such as clay minerals have been widely investigated to reverse these limitations by interaction/protection in the host materials (Kohno et al, 2009;Teixeira-Neto et al, 2012;Pimchan et al, 2014;Lu et al, 2019;Samuei et al, 2020). This strategy is inspired by Maya Blue pigments, in which a variety of clay minerals and organic dyes have been used to prepare stable pigments (Trigueiro et al, 2018;Chen et al, 2019;Zhuang et al, 2019a;Silva et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Lima

Silva

Silva-Filho

et al. 2020

Applied Clay Science

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Hybrid pigments based on organo-saponite (cetyltrimethyl ammonium bromide (CTAB-Sap) and a commercial anthocyanin (ACN) dye, Crystal Red Grape, were prepared. The interactions between organic dye guest and hosts (including saponite and organo-saponite) were investigated by X-ray diffraction, transmission electron microscopy and Fourier transform infrared spectroscopy. The pigments exhibit different colors function of their host-guest interactions. The blue color of organo-clay-anthocyanin indicates the stabilization of quinoidal base form of the dye. The hybrids have good stability against visible light irradiation and basic pH conditions. These dyed materials are environmentally friendly and can be promising candidates in different application fields.

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“…Palygorskite has received considerable attention in the fields of pigments, 5,6 decolorizing agent, 7,8 thickeners, 9,10 colloid, 11,12 mycotoxin adsorbents, [13][14][15][16][17] radioactive material adsorbents, [18][19][20][21] and drilling muds 22,23 for the large number of channels in its internal structure. 24 At the same time, it is widely used in friction materials, 25,26 carrier, 27 catalytic materials, 28 rubber, and plastic composites 29,30 because of the nano-scaled slender rod crystals.…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution and sintering properties of palygorskite nanofibers

Wang

Lijuan

Zhang

et al. 2020

Int J Applied Ceramic Tech

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In this study, the morphological evolution and sintering properties of the palygorskite nanofibers were studied along with the increase of temperature, using raw palygorskite as materials. The palygorskite powder was calcined at different temperatures in the range of 100°C‐1200°C, and the microstructural evolution of the palygorskite nanofibers was investigated by thermogravimetric and differential thermal analysis (TG‐DTA), X‐ray diffraction (XRD), scanning electron microscopy (SEM), and high‐resolution transmission electron microscope (HRTEM). Furthermore, the palygorskite powder was shaped to bars by dry pressing and sintered from 700°C to 1200°C. The properties of the sintered palygorskite were characterized by bending strength, mercury intrusion porosimeter (MIP), and stepwise isothermal dilatometry (SID). The results showed that the morphology of palygorskite nanofibers maintained unchanged till 1000°C. The palygorskite nanofibers molted to bind each other and formed a solid interwoven network structure at 1100°C. Correspondingly, it was shown from the sharply decrease of the sintered palygorskite porosity from 45.46% at 1000°C to 1.82% at 1100°C that the dense sintering of palygorskite started at 1100°C. With the sintering proceeding, some closed micropores fused each other to form bigger opening pores, resulting in a slight increase of porosity at 1200°C. However, the pore size distribution got more uniform and the density of the sintered body increased. So the bending strength of the sintered body reached the maximum of 176.67 Mpa and finally the main crystalline phases of the sintered sample changed to quartz, enstatite, and kyanite. The sintering activation energy of the palygorskite was measured by means of SID with a value of 906.46 kJ·mol−1.

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A comparative study of different natural palygorskite clays for fabricating cost-efficient and eco-friendly iron red composite pigments

Cited by 51 publications

References 66 publications

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Incorporation of Different Metal Ion for Tuning Color and Enhancing Antioxidant Activity of Curcumin/Palygorskite Hybrid Materials

Saponite-anthocyanin derivatives: The role of organoclays in pigment photostability

Microstructural evolution and sintering properties of palygorskite nanofibers

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