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Liu P.,Lanzhou University | Liu P.,Jiangsu Goldstone Attapulgite R and nter Co. | Jiang L.,Lanzhou University | Zhu L.,Lanzhou University | And 2 more authors.
Journal of Industrial and Engineering Chemistry | Year: 2014

Novel covalently crosslinked attapulgite/poly(acrylic acid-co-acrylamide) (ATP/P(AA-co-AM)) nanocomposite hydrogel was synthesized via a facile "one-pot" two-step approach, with the modified attapulgite (ATP{single bond}C{double bond, long}C) nanorods as the sole crosslinker. Orthogonal experiment was designed to investigate the effect of the synthetic condition on the resultant nanocomposite hydrogels. The ATP/P(AA-co-AM)) nanocomposite hydrogels exhibited selective adsorption toward Pb2+ and Cu2+. The adsorbed ions could be easily desorbed, indicating their desired reusability. These excellent features, such as facile preparation, high mechanical stability, high adsorption capacity, and simple reactivation, make them potential adsorbent for the treatment of the heavy metal-contaminated water. © 2014 The Korean Society of Industrial and Engineering Chemistry.

Zhu L.,Lanzhou University | Guo J.,Lanzhou University | Liu P.,Lanzhou University | Liu P.,Jiangsu Goldstone Attapulgite R andnter Co. | Zhao S.,Jiangsu Goldstone Attapulgite R andnter Co.
Applied Clay Science | Year: 2016

A novel strategy was developed for the preparation of a palygorskite/poly(acrylic acid) nanocomposite (Pal/PAA) hydrogel with a 3-D network structure, by the surface-initiated redox radical solution polymerization of acrylic acid (AA) with the bi-functionalized palygorskite (BF-Pal) nanorods, in which the amino groups acted as the initiating groups, and the C. C groups acted as the crosslinking groups. The effect of the synthesis conditions on the component in the Pal/PAA nanocomposite hydrogels were investigated with TGA analysis. The designed Pal/PAA hydrogel exhibited a remarkably high adsorption capacity for methylene blue (MB) of 833.9 mg/g. © 2015 Elsevier B.V.

Liu P.,Lanzhou University | Liu P.,Huaiyin Institute of Technology | Zhu L.,Lanzhou University | Guo J.,Lanzhou University | And 3 more authors.
Applied Clay Science | Year: 2014

Novel palygorskite/polystyrene (PLG/PS) nanocomposites were synthesized via the facile in-situ bulk radical polymerization of styrene in the presence of the organo-palygorskite (Org-PLG) nanorods, which was prepared by the modification of the acid-activated palygorskite (A-PLG) nanorods with the functional silane (γ-methacryloxypropyl trimethoxy silane (MPS)). The micro-gels with the Org-PLG nanorods as crosslinker were produced in the PLG/PS nanocomposites regardless of the polymerizing conditions, such as the feeding ratios of the Org-PLG, initiator and N2 atmosphere. Based on the gelation and thermal properties of the PLG/PS nanocomposites, the optimal preparation condition via the in-situ bulk polymerization was achieved and the crosslinking mechanism to the micro-gels was also depicted. This understanding should lead to a better design of clay mineral modifications for use in polymer nanocomposites. © 2014 Published by Elsevier B.V.

Jiang L.,Lanzhou University | Liu P.,Lanzhou University | Liu P.,Jiangsu Goldstone Attapulgite R and nter Co. | Zhao S.,Jiangsu Goldstone Attapulgite R and nter Co.
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2015

Magnetic attapulgite/fly ash/poly(acrylic acid-co-acrylamide) (ATP/FA/Poly(AA-co-AM)) ternary nanocomposite microgels were designed via an inverse suspension copolymerization of acrylic acid (AA) and acrylamide (AM) in liquid paraffin with span-80 as stabilizer, in which attapulgite (ATP) and fly ash (FA) were used to develop a rigid inorganic skeleton, while the soft and elastic poly(acrylic acid-co-acrylamide) (Poly(AA-co-AM)) blocks were grafted onto the rigid inorganic skeleton to form the beadlike ATP/FA/Poly(AA-co-AM) microgels with a 3-D network, validating the expected performance. The magnetic ATP/FA/Poly(AA-co-AM) microgels showed a certain magnetic characteristic and good adsorption capacity to heavy metal ions, especially to Pb2+. © 2015 Elsevier B.V.

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