Co-reporter:Wenting Li;Na Li;Jiaxu Zhao;Xiaokai Zhang
Journal of Polymer Science Part B: Polymer Physics 2016 Volume 54( Issue 16) pp:1551-1557
Publication Date(Web):
DOI:10.1002/polb.24067
ABSTRACT
4-Hydroxythiophenol (HTP) grafted poly(styrene-b-acrylic acid) (PS-b-PAA) block copolymers (BCPs) (PS-b-PAA-g-HTP) was synthesized using the esterification reaction between the carboxyl groups and hydroxyl groups. Self-assembly behavior of the graft copolymer in 1,4-dioxane/water was investigated. Assemblies of different morphologies, porous, and bowl-shaped structures, could be easily prepared. A possible mechanism for the formation of the porous and bowl-shaped structures was discussed. The present study showed a facile method for the preparation of functionalized PS-b-PAA BCPs, which could easily self-assembly into novel structures in aqueous solution. These assemblies may be used to generate new functional materials. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 1551–1557
Co-reporter:Na Li, Xiaoyu Zhang, Shulong Yuan, Xiaokai Zhang, Yuzhen Yuan and Xue Li
Physical Chemistry Chemical Physics 2015 vol. 17(Issue 18) pp:12023-12030
Publication Date(Web):01 Apr 2015
DOI:10.1039/C4CP06093H
Composite nanoparticles (NPs) containing a TiO2 outer shell and an inner core of hollow AuAg NPs (H-AuAg-NPs) were prepared using hollow AuAg NPs with block copolymer shells as templates, and their photocatalytic activities were investigated by the decomposition of methylene blue dye under UV irradiation. It was found that the H-AuAg-NP–TiO2 composite NPs showed higher photocatalytic activity than AuAg alloy–TiO2 composite NPs, Ag/TiO2 NPs and TiO2 NPs. In addition, the photocatalytic activity first increases with increasing the TiO2 content from 2.5% to 5.0% and then decreases with a further increase in TiO2 content from 10.0% to 15.0%.
Co-reporter:Jinhao Liu;Lianlian Song;Xiaokai Zhang
Journal of Polymer Science Part B: Polymer Physics 2014 Volume 52( Issue 14) pp:953-959
Publication Date(Web):
DOI:10.1002/polb.23514
ABSTRACT
An approach for the preparation of block copolymer vesicles through ultrasonic treatment of polystyrene-block-poly(2-vinyl pyridine) (PS-b-P2VP) micelles under alkaline conditions is reported. PS-b-P2VP block copolymers in toluene, a selective solvent for PS, form spherical micelles. If a small amount of NaOH solution is added to the micelles solution during ultrasonic treatment, organic-inorganic Janus-like particles composed of the PS-b-P2VP block copolymers and NaOH are generated. After removal of NaOH, block copolymer vesicles are obtained. A possible mechanism for the morphological transition from spherical micelles to vesicles or Janus-like particles is discussed. If the block copolymer micelles contain inorganic precursors, such as FeCl3, hybrid vesicles are formed, which may be useful as biological and chemical sensors or nanostructured templates. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 953–959
Co-reporter:Lianlian Song;Xiaokai Zhang;Jinhao Liu
Polymer Science, Series B 2014 Volume 56( Issue 5) pp:675-680
Publication Date(Web):2014 September
DOI:10.1134/S1560090414050133
Gold nanoparticles by using the mixture of polystyrene-block-poly(2-vinyl pyridine)/poly(2-vinyl pyridine)-block-poly(ethylene oxide) (PS-b-P2VP/P2VP-b-PEO) block copolymers as encapsulating agent was prepared. The prepared nanoparticles were characterized by transmission electron microscopy, UV-Vis spectroscopy and contact angle. It is demonstrated that the obtained gold nanoparticles are covered with mixed block copolymer shells. The hydrophilic property of the nanoparticles can be varied by the change of the dispersion medium. The obtained gold nanoparticles with mixed block copolymer shells are stable in organic solvents (such as tetrahydrofuran and toluene) and water.
Co-reporter:Xiaoning Fu;Lianlian Song;Jun Liu;Xiaokai Zhang;Yuxi Jia
Macromolecular Chemistry and Physics 2012 Volume 213( Issue 16) pp:1663-1668
Publication Date(Web):
DOI:10.1002/macp.201200133
Abstract
A novel approach to organic-inorganic Janus-like particles based on the alkalization process of polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) micelles containing FeCl3 precursors in the P2VP cores in toluene is presented. It is found that by addition of a small amount of NaOH solution to a solution of the spherical PS-b-P2VP/FeCl3 micelles, organic-inorganic Janus-like particles with a produced α-FeOOH domain on one side and PS-b-P2VP block copolymers on the other can be prepared. The Janus-like nanoparticles obtained by this facile approach may have potential application in biomedical areas.
Co-reporter:Xue Li, Xiaoning Fu and Hui Yang
Physical Chemistry Chemical Physics 2011 vol. 13(Issue 7) pp:2809-2814
Publication Date(Web):14 Dec 2010
DOI:10.1039/C0CP01353F
A novel route for a preparation of eccentric Au–titania core–shell nanoparticles using gold nanoparticles (AuNPs) with block copolymer shells as a template is reported. AuNPs with poly(2-vinyl pyridine)-block-poly(ethylene oxide) (PVP-b-PEO) block copolymer shells are first prepared by UV irradiation of the solution of PVP-b-PEO/HAuCl4 complexes. Then the sol–gel reaction of titanium tetra-isopropoxide (TTIP) selectively on the surfaces of AuNPs leads to Au–titania core–shell composite nanoparticles. The eccentric Au–titania core–shell nanoparticles are obtained from the Au–titania core–shell composite nanoparticles by removal of organic interlayer by UV treatment. Photocatalytic activities of the resulting eccentric core–shell nanoparticles are investigated in terms of the degradation of methylene blue (MB). The results show that the eccentric core–shell structures endow the catalyst with greatly enhanced photocatalytic activity.
Co-reporter:Xue Li;Hui Yang;Limei Xu;Xiaoning Fu;Huanwang Guo;Xiaokai Zhang
Macromolecular Chemistry and Physics 2010 Volume 211( Issue 3) pp:
Publication Date(Web):
DOI:10.1002/macp.201090004
Co-reporter:Xue Li;Hui Yang;Limei Xu;Xiaoning Fu;Huanwang Guo;Xiaokai Zhang
Macromolecular Chemistry and Physics 2010 Volume 211( Issue 3) pp:297-302
Publication Date(Web):
DOI:10.1002/macp.200900366
Co-reporter:Xue Li;Hui Yang;Limei Xu;Xiaoning Fu;Huanwang Guo;Xiaokai Zhang
Macromolecular Chemistry and Physics 2010 Volume 211( Issue 3) pp:275-278
Publication Date(Web):
DOI:10.1002/macp.201090005
Co-reporter:Limei Xu, Xiaokai Zhang, Hui Yang, Xue Li, Chunsheng Li, Shuxiang Zhang
Polymer 2010 Volume 51(Issue 16) pp:3808-3813
Publication Date(Web):22 July 2010
DOI:10.1016/j.polymer.2010.06.002
A novel route for a preparation of polystyrene-block-poly(ethylene oxide) (PS-b-PEO) block copolymer vesicles induced by supercritical carbon dioxide (scCO2) is demonstrated. When PS-b-PEO block copolymer solutions in tetrahydrofuran (THF) are treated with scCO2 at 70 °C for different times, PS-b-PEO copolymers first assemble into aggregated spheres; then aggregated spheres change into large compound micelles and finally evolve into vesicles. The possible formation mechanism of the vesicles is discussed.
Co-reporter:Hui Yang, Limei Xu, Xue Li, Xiaokai Zhang
Materials Chemistry and Physics 2009 Volume 114(2–3) pp:525-529
Publication Date(Web):15 April 2009
DOI:10.1016/j.matchemphys.2008.11.040
A simple, facile method for the fabrication of a gold nanowire network in large scale on the solid substrates is presented. In a selective solvent, micelles of poly(2-vinylpyridine)-block-poly(ethylene oxide) (P2VP-b-PEO) are formed. After spin coating of the micelles solution on silicon wafers, network structures of P2VP-b-PEO aggregates are obtained. The micellar films of the block copolymers are used as templates for the selective loading gold precursors (HAuCl4) in P2VP domains. The gold nanowire networks are generated after the removal of the block copolymer templates by an oxygen plasma treatment.
Co-reporter:Na Li, Xiaoyu Zhang, Shulong Yuan, Xiaokai Zhang, Yuzhen Yuan and Xue Li
Physical Chemistry Chemical Physics 2015 - vol. 17(Issue 18) pp:NaN12030-12030
Publication Date(Web):2015/04/01
DOI:10.1039/C4CP06093H
Composite nanoparticles (NPs) containing a TiO2 outer shell and an inner core of hollow AuAg NPs (H-AuAg-NPs) were prepared using hollow AuAg NPs with block copolymer shells as templates, and their photocatalytic activities were investigated by the decomposition of methylene blue dye under UV irradiation. It was found that the H-AuAg-NP–TiO2 composite NPs showed higher photocatalytic activity than AuAg alloy–TiO2 composite NPs, Ag/TiO2 NPs and TiO2 NPs. In addition, the photocatalytic activity first increases with increasing the TiO2 content from 2.5% to 5.0% and then decreases with a further increase in TiO2 content from 10.0% to 15.0%.
Co-reporter:Xue Li, Xiaoning Fu and Hui Yang
Physical Chemistry Chemical Physics 2011 - vol. 13(Issue 7) pp:NaN2814-2814
Publication Date(Web):2010/12/14
DOI:10.1039/C0CP01353F
A novel route for a preparation of eccentric Au–titania core–shell nanoparticles using gold nanoparticles (AuNPs) with block copolymer shells as a template is reported. AuNPs with poly(2-vinyl pyridine)-block-poly(ethylene oxide) (PVP-b-PEO) block copolymer shells are first prepared by UV irradiation of the solution of PVP-b-PEO/HAuCl4 complexes. Then the sol–gel reaction of titanium tetra-isopropoxide (TTIP) selectively on the surfaces of AuNPs leads to Au–titania core–shell composite nanoparticles. The eccentric Au–titania core–shell nanoparticles are obtained from the Au–titania core–shell composite nanoparticles by removal of organic interlayer by UV treatment. Photocatalytic activities of the resulting eccentric core–shell nanoparticles are investigated in terms of the degradation of methylene blue (MB). The results show that the eccentric core–shell structures endow the catalyst with greatly enhanced photocatalytic activity.
