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Zhang H, Gao X, Chen K, Li H, Peng L. Thermo-sensitive and swelling properties of cellouronic acid sodium/poly (acrylamide-co-diallyldimethylammonium chloride) semi-IPN. Carbohydr Polym 2018; 181:450-459. [DOI: 10.1016/j.carbpol.2017.10.093] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Revised: 09/26/2017] [Accepted: 10/28/2017] [Indexed: 12/16/2022]
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2
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Chen M, Mokhtar MZ, Whittaker E, Lian Q, Hamilton B, O'Brien P, Zhu M, Cui Z, Haque SA, Saunders BR. Reducing hole transporter use and increasing perovskite solar cell stability with dual-role polystyrene microgel particles. Nanoscale 2017; 9:10126-10137. [PMID: 28696442 DOI: 10.1039/c7nr02650a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Perovskite solar cells (PSCs) are a disruptive technology that continues to attract considerable attention due to their remarkable and sustained power conversion efficiency increase. Improving PSC stability and reducing expensive hole transport material (HTM) usage are two aspects that are gaining increased attention. In a new approach, we investigate the ability of insulating polystyrene microgel particles (MGs) to increase PSC stability and replace the majority of the HTM phase. MGs are sub-micrometre crosslinked polymer particles that swell in a good solvent. The MGs were prepared using a scalable emulsion polymerisation method. Mixed HTM/MG dispersions were subsequently spin-coated onto PSCs and formed composite HTM-MG layers. The HTMs employed were poly(triaryl amine) (PTAA), poly(3-hexylthiophene) (P3HT) and Spiro-MeOTAD (Spiro). The MGs formed mechanically robust composite HTMs with PTAA and P3HT. In contrast, Spiro-MG composites contained micro-cracks due the inability of the relatively small Spiro molecules to interdigitate. The efficiencies for the PSCs containing PTAA-MG and P3HT-MG decreased by only ∼20% compared to control PSCs despite PTAA and P3HT being the minority phases. They occupied only ∼35 vol% of the composite HTMs. An unexpected finding from the study was that the MGs dispersed well within the PTAA matrix. This morphology aided strong quenching of the CH3NH3PbI3-xClx fluorescence. In addition, the open circuit voltages for the PSCs prepared using P3HT-MG increased by ∼170 mV compared to control PSCs. To demonstrate their versatility the MGs were also used to encapsulate P3HT-based PSCs. Solar cell stability data for the latter as well as those for PSCs containing composite HTM-MG were both far superior compared to data measured for a control PSC. Since MGs can reduce conjugated polymer use and increase stability they have good potential as dual-role PSC additives.
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Affiliation(s)
- Mu Chen
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Muhamad Z Mokhtar
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Eric Whittaker
- Photon Science Institute, University of Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL, UK
| | - Qing Lian
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Bruce Hamilton
- Photon Science Institute, University of Manchester, Alan Turing Building, Oxford Road, Manchester, M13 9PL, UK
| | - Paul O'Brien
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK. and School of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Mingning Zhu
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Zhengxing Cui
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Saif A Haque
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, South Kensington Campus, SW7 2AZ, UK
| | - Brian R Saunders
- School of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
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Fernandez VVA, Aguilar J, Soltero JFA, Moscoso-Sánchez FJ, Sánchez-Díaz JC, Hernandez E, Bautista F, Puig JE. Thermoresponsive poly(N-isopropylacrylamide) nanogels/poly(acrylamide) nanostructured hydrogels. Journal of Macromolecular Science, Part A 2016. [DOI: 10.1080/10601325.2016.1132912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Affiliation(s)
- Maya Ovadia
- Department of Materials Science and Engineering; Technion - Israel Institute of Technology; Haifa 32000 Israel
| | - Michael S Silverstein
- Department of Materials Science and Engineering; Technion - Israel Institute of Technology; Haifa 32000 Israel
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Hu X, Vatankhah-Varnoosfaderani M, Zhou J, Li Q, Sheiko SS. Weak Hydrogen Bonding Enables Hard, Strong, Tough, and Elastic Hydrogels. Adv Mater 2015; 27:6899-905. [PMID: 26436409 DOI: 10.1002/adma.201503724] [Citation(s) in RCA: 286] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 08/23/2015] [Indexed: 05/22/2023]
Abstract
A new type of "rigid and tough" hydrogel with excellent elasticity is designed by dense clustering of hydrogen bonds within a loose chemical network. The resultant hydrogel exhibits a good combination of high modulus (28 MPa), toughness (9300 J m(-3) ), extensibility (800%), and tensile stress (2 MPa). Furthermore, the gel displays good fatigue-resistance and complete and extremely fast recovery of shape and mechanical properties (3 min at 37°C).
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Affiliation(s)
- Xiaobo Hu
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | | | - Jing Zhou
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Qiaoxi Li
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Sergei S Sheiko
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
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Slaughter BV, Blanchard AT, Maass KF, Peppas NA. Dynamic swelling behavior of interpenetrating polymer networks in response to temperature and pH. J Appl Polym Sci 2015; 132. [PMID: 26405349 DOI: 10.1002/app.42076] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Temperature responsive hydrogels based on ionic polymers exhibit swelling transitions in aqueous solutions as a function of shifting pH and ionic strength, in addition to temperature. Applying these hydrogels to useful applications, particularly for biomedical purposes such as drug delivery and regenerative medicine, is critically dependent on understanding the hydrogel solution responses as a function of all three parameters together. In this work, interpenetrating polymer network (IPN) hydrogels of polyacrylamide and poly(acrylic acid) were formulated over a broad range of synthesis variables using a fractional factorial design, and were examined for equilibrium temperature responsive swelling in a variety of solution conditions. Due to the acidic nature of these IPN hydrogels, usable upper critical solution temperature (UCST) responses for this system occur in mildly acidic environments. Responses were characterized in terms of maximum equilibrium swelling and temperature-triggered swelling using turbidity and gravimetric measurements. Additionally, synthesis parameters critical to achieving optimal overall swelling, temperature-triggered swelling, and sigmoidal temperature transitions for this IPN system were analyzed based on the fractional factorial design used to formulate these hydrogels.
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Affiliation(s)
- Brandon V Slaughter
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Aaron T Blanchard
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Katie F Maass
- Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
| | - Nicholas A Peppas
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA ; Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
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Ding WB, Wang L, Yang Q, Xiang WD, Gao JM, Amer WA. Recent Research Progress on Polymer Grafted Carbon Black and Its Novel Applications. INT POLYM PROC 2013. [DOI: 10.3139/217.2678] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Polymer grafting of carbon black (CB) has been intensely researched as polymer modification is one of the effective means for improving the solubility and compatibility of carbon black. Recent advances in the polymer grafting methods allow the introduction of polymers with well controlled composition, structure and molecular weight onto the surface of CB. In addition, modification by functional polymers provides a powerful impetus to extend the applications of polymer-CB composites such as sensitive materials. This review focuses on the development of these grafting polymerization methods and some novel applications of polymer grafted CB.
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Affiliation(s)
- W.-B. Ding
- State Key Laboratory of Chemical Engineering, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, PRC
- Department of Chemistry and Material Engineering, Chaohu College, Chaohu, PRC
| | - L. Wang
- State Key Laboratory of Chemical Engineering, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, PRC
| | - Q. Yang
- State Key Laboratory of Chemical Engineering, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, PRC
| | - W.-D. Xiang
- College of Applied Technology, Wenzhou University, Wenzhou, PRC
| | - J.-M. Gao
- State Key Laboratory of Chemical Engineering, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, PRC
| | - W. A. Amer
- State Key Laboratory of Chemical Engineering, College of Materials Science and Chemical Engineering, Zhejiang University, Hangzhou, PRC
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Sun JX, Wang YL, Dou SH. A novel positively thermo-sensitive hydrogel based on ethylenediaminetetraacetic dianhydride and piperazine: Design, synthesis and characterization. CHINESE CHEM LETT 2012. [DOI: 10.1016/j.cclet.2011.09.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yang M, Liu C, Li Z, Gao G, Liu F. Temperature-Responsive Properties of Poly(acrylic acid-co-acrylamide) Hydrophobic Association Hydrogels with High Mechanical Strength. Macromolecules 2010. [DOI: 10.1021/ma1022555] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meng Yang
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Chang Liu
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Zhiying Li
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Ge Gao
- College of Chemistry, Jilin University, Changchun 130012, China
| | - Fengqi Liu
- College of Chemistry, Jilin University, Changchun 130012, China
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Samanta SK, Pal A, Bhattacharya S, Rao CNR. Carbon nanotube reinforced supramolecular gels with electrically conducting, viscoelastic and near-infrared sensitive properties. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00491j] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Maeda T, Akasaki Y, Yamamoto K, Aoyagi T. Stimuli-responsive coacervate induced in binary functionalized poly(N-isopropylacrylamide) aqueous system and novel method for preparing semi-ipn microgel using the coacervate. Langmuir 2009; 25:9510-9517. [PMID: 19492785 DOI: 10.1021/la9007735] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We describe a novel method for preparing a stimuli-responsive semi-interpenetrating polymer network (semi-IPN) hydrogel microsphere using a thermoresponsive-type coacervation. The coacervate droplets were formed in the two-component nonionic poly(N-isopropylacrylamide-co-2-hydroxyisopropylacrylamide) (poly(NIPAAm-co-HIPAAm)) and ionic poly(NIPAAm-co-2-carboxyisopropylacrylamide) (poly(NIPAAm-co-CIPAAm)) aqueous system by heating the solution above the lower critical solution temperature. The resulting coacervate droplets included both kinds of polymer chains. Divinyl sulfone, which cross-links the hydroxyl groups of the poly(NIPAAm-co-HIPAAm), was added to the coacervate droplets. In this way, the stimuli-responsive semi-IPN hydrogel microsphere consisting of the poly(NIPAAm-co-HIPAAm) gel matrix and the linear poly(NIPAAm-co-CIPAAm) chains could be prepared, and their sizes were relatively homogeneous. That is, by utilizing the thermoresponsive coacervate droplets induced in the binary system, we could successfully prepare the fine stimuli-responsive semi-IPN hydrogel microsphere and it was prepared in a simple and easy method without any additives.
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Affiliation(s)
- Tomohiro Maeda
- Department of Nanostructure and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima 890-0065, Japan
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Abstract
A deoxycholic acid-modified beta-cyclodextrin derivative (2) and an azobenzene-branched poly(acrylic acid) copolymer (3) were prepared, and the association and dissociation of 2 with the trans/cis-azobenzene units in 3 were characterized by UV/vis spectroscopy, induced circular dichroism, and 1H NMR spectroscopy. The experimental results indicate that the trans-azobenzene units are bound strongly within the cavities of 2 whereas the cis-azobenzene is not bound at all. A supramolecular inclusion complex (1), formed by 2 and 3, is accompanied by the formation of a hydrogel. The light-responsive gel-to-sol and sol-to-gel phase transitions of the hydrogel, induced by trans-cis photoisomerization of the azobenzene units, were investigated. In the hydrogel system, the trans-azobenzene units in 3 are included inside the hydrophobic cavity of 2. Upon photoirradiation with UV light of 355 nm, the hydrogel is converted efficiently to the sol phase because the trans-azobenzene units are converted photochemically to their cis configurations, whereupon the resulting cis-azobenzene units dissociate from 2. The hydrogel can be recovered from the sol phase by photoirradiation with visible light of 450 nm. The swelling ratio for fresh hydrogel samples, which was found to be 8.7 +/- 0.7, was measured for a number of gel-to-sol and sol-to-gel phase-transition cycles.
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Affiliation(s)
- Yan-Li Zhao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, California 90095, USA
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Chen Y, Ding D, Mao Z, He Y, Hu Y, Wu W, Jiang X. Synthesis of Hydroxypropylcellulose-poly(acrylic acid) Particles with Semi-Interpenetrating Polymer Network Structure. Biomacromolecules 2008; 9:2609-14. [DOI: 10.1021/bm800484e] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ying Chen
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
| | - Dan Ding
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
| | - Zhiqing Mao
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
| | - Yafeng He
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
| | - Yong Hu
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
| | - Wei Wu
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
| | - Xiqun Jiang
- Laboratory of Mesoscopic Chemistry and Department of Polymer Science and Engineering, College of Chemistry and Chemical Engineering, Department of Materials Science, Jiangsu Provincial Laboratory for Nanotechnology, Nanjing University, Nanjing, 210093, Peopleʼs Republic of China
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Wang B, Liu MZ, Liang R, Ding SL, Chen ZB, Chen SL, Jin SP. MMTCA Recognition by Molecular Imprinting in Interpenetrating Polymer Network Hydrogels Based on Poly(acrylic acid) and Poly(vinyl alcohol). Macromol Biosci 2008; 8:417-25. [DOI: 10.1002/mabi.200700176] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
A new thermoresponsive poly-N-isopropylacrylamide (PNIPAM)-ferrocene polymer was synthesized and characterized. PNIPAMFoxy bears additional oxirane groups which were used for attachment by a self-assembly process on a cysteamine-modified gold electrode to create a thin hydrophilic film. The new redox polymer enabled electrical communication between the cofactor pyrrolinoquinoline quinone (PQQ) of soluble glucose dehydrogenase (sGDH) and the electrode for sensitive detection of this enzyme as a prospective protein label. The temperature influence on the redox polymer/enzyme complex was investigated. An inverse temperature response behavior of surface bound PNIPAMFoxy compared to the soluble polymer was found and is discussed in detail. The highest efficiency of mediated electron transfer for the immobilized PNIPAMFoxy with sGDH was observed at 24 degrees C, which was twice as high as that of its soluble counterpart. A steady-state electrooxidation current densitiy of 4.5 microA.cm-2 was observed in the presence of 10 nM sGDH and 5 mM glucose. A detection limit of 0.5 nM of soluble PQQ-sGDH was obtained.
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Affiliation(s)
- Birgit Nagel
- Fraunhofer Institute for Biomedical Engineering, Potsdam, Germany. Martin.Katterle@ibm
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Yang Q, Wang L, Xiang W, Zhou J, Tan QH. A temperature-responsive carbon black nanoparticle prepared by surface-induced reversible addition–fragmentation chain transfer polymerization. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.02.064] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sertchook H, Elimelech H, Makarov C, Khalfin R, Cohen Y, Shuster M, Babonneau F, Avnir D. Composite Particles of Polyethylene @ Silica. J Am Chem Soc 2006; 129:98-108. [PMID: 17199288 DOI: 10.1021/ja0653167] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polyethylene (PE) and silica are perhaps the simplest and most common organic and inorganic polymers, respectively. We describe, for the first time, a physically interpenetrating nanocomposite between these two elementary polymers. While polymer-silica composites are well known, the nanometric physical blending of PE and silica has remained a challenge. A method for the preparation of such materials, which is based on the entrapment of dissolved PE in a polymerizing tetraethoxysilane (TEOS) system, has been developed. Specifically, the preparation of submicron particles of low-density PE@silica and high-density PE@silica is detailed, which is based on carrying out a silica sol-gel polycondensation process within emulsion droplets of TEOS dissolved PE, at elevated temperatures. The key to the successful preparation of this new composite has been the identification of a surfactant, PE-b-PEG, that is capable of stabilizing the emulsion and promoting the dissolution of the PE. A mechanism for the formation of the particles as well as their inner structure are proposed, based on a large battery of analyses, including transmission electron microscopy (TEM) and scanning electron microscopies (SEM), surface area and porosity analyses, various thermal analyses including thermal gravimetric analysis (TGA/DTA) and differential scanning calorimetry (DSC) measurements, small-angle X-ray scattering (SAXS) measurements and solid-state NMR spectroscopy.
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Affiliation(s)
- Hanan Sertchook
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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Tsutsui H, Akashi R. Effects of pigments on the volume-phase-transition properties ofN-isopropylacrylamide gels as light-modulation materials. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21563] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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