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Wang Y, Li L, Wang Y, Yang Q, Ye Z, Sun L, Yang F, Guo X. Effect of Counterions on the Interaction among Concentrated Spherical Polyelectrolyte Brushes. Polymers (Basel) 2021; 13:1911. [PMID: 34201338 PMCID: PMC8227004 DOI: 10.3390/polym13121911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 06/05/2021] [Accepted: 06/07/2021] [Indexed: 11/16/2022] Open
Abstract
The effect of counterions on interactions among spherical polyelectrolyte brushes (SPBs) was systematically investigated by rheology, small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS). The SPB particles consist of a solid polystyrene (PS) core with a diameter of ca.100 nm and a chemically grafted poly-(acrylic acid) (PAA) brush layer. Metal ions of different valences (Na+, Mg2+ and Al3+) were used as counterions to study the interactions among concentrated SPBs. The so-called "structure factor peak" in SAXS, the "local ordered structure peak" in WAXS and rheological properties indicated the interactions among concentrated SPBs. Combining SAXS, WAXS and rheology, the formation mechanism of the local ordered structure among PAA chains in the overlapped area of adjacent SPB, which was generated due to the bridge function of counterions, was confirmed. In contrast, excessive counterions shielded the electrostatic interaction among PAA chains and destroyed the local ordered structure. This work enriches our understanding of the polyelectrolyte assembly in concentrated SPBs under the effect of counterions and lays the foundations for SPB applications.
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Affiliation(s)
- Yunwei Wang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
| | - Li Li
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
| | - Yiming Wang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
| | - Qingsong Yang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
| | - Zhishuang Ye
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
| | - Liang Sun
- Engineering Research Center of Xinjiang Bingtuan of Materials Chemical Engineering, Shihezi University, Shihezi 832000, China;
| | - Fan Yang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; (Y.W.); (Y.W.); (Q.Y.); (Z.Y.); (F.Y.)
- Engineering Research Center of Xinjiang Bingtuan of Materials Chemical Engineering, Shihezi University, Shihezi 832000, China;
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Wang Y, Li L, Wang Y, Yang Q, Ye Z, Fu Z, Sun L, Guo X. Coacervation of Spherical Polyelectrolyte Brushes with Additional Polyelectrolytes Bearing Positive or Negative Charges. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6388-6396. [PMID: 34008987 DOI: 10.1021/acs.langmuir.1c00026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
By combining small-angle X-ray scattering, wide-angle X-ray scattering, and rheology, the effect of additional polyelectrolyte chains on interactions among spherical polyelectrolyte brushes (SPB) was systematically investigated both on microscopic and macroscopic levels. The negatively charged poly(acrylic acid) (PAA) chains and positively charged poly(dimethyl diallyl ammonium chloride) (PDDA) chains were used as additional polyelectrolyte chains to investigate the local ordered structure and the "polyelectrolyte peak" among SPB. Interestingly, coacervation appeared in the SPB emulsion while introducing additional free polyelectrolyte chains. The addition of excess positively charged PDDA chains would lead to the transformation of the SPB emulsion from the coacervation to the aggregation, while it has not been observed in the case of PAA chains. Moreover, it was further confirmed that the specific local ordered structure was caused by the electrostatic interaction among polyelectrolyte chains of adjacent SPB. This work could enrich our understanding of polyelectrolyte assembly in concentrated SPB, thereby greatly broadening the application fields of SPB.
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Affiliation(s)
- Yunwei Wang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Li Li
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Yiming Wang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Qingsong Yang
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Zhishuang Ye
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Zhinan Fu
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Liang Sun
- Engineering Research Center of Xinjiang Bingtuan of Materials Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832000, P.R. China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology (Ministry of Education), and International Joint Research Center of Green Energy Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
- Engineering Research Center of Xinjiang Bingtuan of Materials Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832000, P.R. China
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Exploring the Interfacial Phase and π-π Stacking in Aligned Carbon Nanotube/Polyimide Nanocomposites. NANOMATERIALS 2020; 10:nano10061158. [PMID: 32545565 PMCID: PMC7353158 DOI: 10.3390/nano10061158] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/22/2020] [Accepted: 06/01/2020] [Indexed: 11/16/2022]
Abstract
To characterize the interfacial microstructure and interaction at a nanoscale has a significant meaning for the interface improvement of the nanocomposites. In this study, the interfacial microstructure and features of aligned multiwalled carbon nanotube (MWNT) and conjugated polymer polyimide (PI) with three molecular structures were investigated using small-angle X-ray scattering (SAXS), wide-angle x-ray diffraction (WAXD), and fluorescence emission spectroscopy. It was found that aligned MWNT/PI nanocomposites had a nonideal two-phase system with the interfaces belonging to long period stacking ordered structure. Attributed to the π-π stacking effect, MWNT/BTDA-MPD presented the most regular arrangement verified by fractal dimension. By adopting a one-dimension correlation function, each phase dimension in aligned MWNT/PI nanocomposites was calculated and verified by high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The π-π stacking was demonstrated to be an important interaction between MWNT and PI via WAXD and fluorescence emission spectroscopy, and it was influenced by the linkage bond between benzene rings in PIs. This work is of significance to reveal the interfacial features between conjugated polymer and carbon nanotubes (CNTs), which is favorable for the interface design of CNT-based high performance nanocomposites.
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Brownian Dynamics Simulations of Rigid Polyelectrolyte Chains Grafting to Spherical Colloid. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2042-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Han H, Li L, Wang W, Tian Y, Wang Y, Wang J, von Klitzing R, Guo X. Core-Shell-Corona Silica Hybrid Nanoparticles Templated by Spherical Polyelectrolyte Brushes: A Study by Small Angle X-ray Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9857-9865. [PMID: 28836791 DOI: 10.1021/acs.langmuir.7b02239] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Core-shell-corona silica/polymer hybrid nanoparticles with narrow size distribution were prepared in the template of spherical polyelectrolyte brushes (SPB) which consist of a solid polystyrene (PS) core densely grafted with linear poly(acrylic acid) (PAA) chains. The microstructure of obtained hybrid nanoparticles was studied by small-angle X-ray scattering (SAXS) and in combination with dynamic light scattering (DLS) and transmission electron microscopy (TEM). The generation of silica shell within the brush is confirmed by the significant increase of the electron density in the shell, and the silica shell showed a unique inner-loose-outer-dense structure, whose thickness is pH sensitive but is insensitive to ionic strength as revealed by fitting SAXS data. After dissolving the PS core, hollow silica nanoparticles were obtained and determined by SAXS, which should be ideal carriers for pH-triggered drug delivery. SAXS is confirmed to be a powerful method to characterize the core-shell-corona silica/polymer hybrid and hollow silica nanoparticles.
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Affiliation(s)
- Haoya Han
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
- Department of Physics, Technical University Darmstadt , Alarich-Weiss-Strasse 10, 64287 Darmstadt, Germany
| | - Li Li
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Weihua Wang
- Sinopec Shanghai Research Institute of Petrochemical Technology , 201208 Shanghai, P.R. China
| | - Yuchuan Tian
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Yunwei Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Junyou Wang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
| | - Regine von Klitzing
- Department of Physics, Technical University Darmstadt , Alarich-Weiss-Strasse 10, 64287 Darmstadt, Germany
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, P.R. China
- Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University , 832000 Xinjiang, P.R. China
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Wang W, Li L, Henzler K, Lu Y, Wang J, Han H, Tian Y, Wang Y, Zhou Z, Lotze G, Narayanan T, Ballauff M, Guo X. Protein Immobilization onto Cationic Spherical Polyelectrolyte Brushes Studied by Small Angle X-ray Scattering. Biomacromolecules 2017; 18:1574-1581. [PMID: 28398743 DOI: 10.1021/acs.biomac.7b00164] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The immobilization of bovine serum albumins (BSA) onto cationic spherical polyelectrolyte brushes (SPB) consisting of a solid polystyrene (PS) core and a densely grafted poly(2-aminoethyl methacrylate hydrochloride) (PAEMH) shell was studied by small-angle X-ray scattering (SAXS). The observed dynamics of adsorption of BSA onto SPB by time-resolved SAXS can be divided into two stages. In the first stage (tens of milliseconds), the added proteins as in-between bridge instantaneously caused the aggregation of SPB. Then BSA penetrated into the brush layer driven by electrostatic attractions, and reached equilibrium in the second stage (tens of seconds). The amount of BSA immobilized onto brush layer reached the maximum when pH was increased to about 6.1 and BSA concentration to 10 g/L. The cationic SPB were confirmed to provide stronger adsorption capacity for BSA compared to anionic ones.
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Affiliation(s)
- Weihua Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China.,Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany
| | - Li Li
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Katja Henzler
- Paul Scherer Institute , Laboratory for Synchrotron Radiation and Femtochemistry, 5232 Villigen PSI, Switzerland
| | - Yan Lu
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany.,Institut für Phzsik, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Junyou Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Haoya Han
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Yuchuan Tian
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Yunwei Wang
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Zhiming Zhou
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China
| | - Gudrun Lotze
- European Synchrotron Radiation Facility , F-38043, Grenoble, France
| | | | - Matthias Ballauff
- Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Hahn-Meitner-Platz 1, 14109 Berlin, Germany.,Institut für Phzsik, Humboldt-Universität zu Berlin , 12489 Berlin, Germany
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering, East China University of Science and Technology , Shanghai 200237, People's Republic of China.,Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University , Xinjiang 832000, People's Republic of China
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Wang W, Chu F, Li L, Han H, Tian Y, Wang Y, Yuan Z, Zhou Z, Guo X. Interactions among spherical poly(acrylic acid) brushes: Observation by rheology and small angle X-ray scattering. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Weihua Wang
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Fangfang Chu
- Soft Matter and Functional Materials; Helmholtz-Zentrum Berlin Für Materialien Und Energie; Hahn-Meitner-Platz 1 Berlin 14109 Germany
| | - Li Li
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Haoya Han
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Yuchuan Tian
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Yunwei Wang
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Zhenyu Yuan
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Zhiming Zhou
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
- Engineering Research Center of Xinjiang Bingtuan of Materials-Oriented Chemical Engineering; Shihezi University; Xinjiang 832000 People's Republic of China
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Tunable immobilization of protein in anionic spherical polyelectrolyte brushes as observed by small-angle X-ray scattering. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3684-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Wang W, Li L, Yu X, Han H, Guo X. Distribution of magnetic nanoparticles in spherical polyelectrolyte brushes as observed by small-angle X-ray scattering. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/polb.23580] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Weihua Wang
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Li Li
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Xuanji Yu
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Haoya Han
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
| | - Xuhong Guo
- State-Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 People's Republic of China
- Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang Uygur Autonomous Region and Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Production and Construction; Shihezi University; Xinjiang 832000 People's Republic of China
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