1
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Nagasawa A, Watanabe K, Suga K, Nagao D. Independent control over sizes and surface properties of polystyrene-based particles using multiple comonomers. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Sadat Hosseini Z, Abdollahi A, Dashti A, Matin MM, Afkhami-Poostchi A. Synthesis of tertiary amine functionalized Multi-Stimuli-Responsive latex nanoparticles by semicontinuous emulsion Polymerization: Investigation of responsivities and antimicrobial activity. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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3
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Vialetto J, Camerin F, Grillo F, Ramakrishna SN, Rovigatti L, Zaccarelli E, Isa L. Effect of Internal Architecture on the Assembly of Soft Particles at Fluid Interfaces. ACS NANO 2021; 15:13105-13117. [PMID: 34328717 PMCID: PMC8388124 DOI: 10.1021/acsnano.1c02486] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Monolayers of soft colloidal particles confined at fluid interfaces are at the core of a broad range of technological processes, from the stabilization of responsive foams and emulsions to advanced lithographic techniques. However, establishing a fundamental relation between their internal architecture, which is controlled during synthesis, and their structural and mechanical properties upon interfacial confinement remains an elusive task. To address this open issue, which defines the monolayer's properties, we synthesize core-shell microgels, whose soft core can be chemically degraded in a controlled fashion. This strategy allows us to obtain a series of particles ranging from analogues of standard batch-synthesized microgels to completely hollow ones after total core removal. Combined experimental and numerical results show that our hollow particles have a thin and deformable shell, leading to a temperature-responsive collapse of the internal cavity and a complete flattening after adsorption at a fluid interface. Mechanical characterization shows that a critical degree of core removal is required to obtain soft disk-like particles at an oil-water interface, which present a distinct response to compression. At low packing fractions, the mechanical response of the monolayer is dominated by the outer polymer chains forming a corona surrounding the particles within the interfacial plane, regardless of the presence of a core. By contrast, at high compression, the absence of a core enables the particles to deform in the direction orthogonal to the interface and to be continuously compressed without altering the monolayer structure. These findings show how fine, single-particle architectural control during synthesis can be engineered to determine the interfacial behavior of microgels, enabling one to link particle conformation with the resulting material properties.
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Affiliation(s)
- Jacopo Vialetto
- Laboratory
for Soft Materials and Interfaces, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Fabrizio Camerin
- CNR
Institute for Complex Systems, Uos Sapienza, P.le A. Moro 2, 00185 Roma, Italy
- Department
of Basic and Applied Sciences for Engineering, Sapienza University of Rome, via A. Scarpa 14, 00161 Roma, Italy
| | - Fabio Grillo
- Laboratory
for Soft Materials and Interfaces, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Shivaprakash N. Ramakrishna
- Laboratory
for Soft Materials and Interfaces, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Lorenzo Rovigatti
- CNR
Institute for Complex Systems, Uos Sapienza, P.le A. Moro 2, 00185 Roma, Italy
- Department
of Physics, Sapienza University of Rome, P.le A. Moro 2, 00185 Roma, Italy
| | - Emanuela Zaccarelli
- CNR
Institute for Complex Systems, Uos Sapienza, P.le A. Moro 2, 00185 Roma, Italy
- Department
of Physics, Sapienza University of Rome, P.le A. Moro 2, 00185 Roma, Italy
| | - Lucio Isa
- Laboratory
for Soft Materials and Interfaces, Department of Materials, ETH Zürich, Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
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4
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Eskandari P, Abousalman-Rezvani Z, Hajebi S, Roghani-Mamaqani H, Salami-Kalajahi M. Controlled release of anti-cancer drug from the shell and hollow cavities of poly(N-isopropylacrylamide) hydrogel particles synthesized via reversible addition-fragmentation chain transfer polymerization. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109877] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Vretik LO, Noskov YV, Ogurtsov NA, Nikolaeva OA, Shevchenko AV, Marynin AI, Kharchuk MS, Chepurna OM, Ohulchanskyy TY, Pud AA. Thermosensitive ternary core–shell nanocomposites of polystyrene, poly(N-isopropylacrylamide) and polyaniline. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01424-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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6
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Hajebi S, Abdollahi A, Roghani-Mamaqani H, Salami-Kalajahi M. Temperature-Responsive Poly( N-Isopropylacrylamide) Nanogels: The Role of Hollow Cavities and Different Shell Cross-Linking Densities on Doxorubicin Loading and Release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2683-2694. [PMID: 32130018 DOI: 10.1021/acs.langmuir.9b03892] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Smart polymers with extraordinary characteristics are studied in drug-delivery applications. In the current study, temperature-responsive hybrid core-shell nanoparticles were synthesized by precipitation polymerization of N-isopropylacrylamide and vinyl-modified silica nanoparticles. These temperature-responsive hybrid core-shells were prepared with different cross-linking densities by using 2, 4, and 8 mol % of N,N-methylene bisacrylamide (MBA). Hydrolysis of the silica cores of the hybrid core-shells resulted in hollow poly(N-isopropylacrylamide) (PNIPAM) nanogels. Functionalization of silica nanoparticles with vinyl-containing silane modifier of 3-(trimethoxysilyl) propyl methacrylate (MPS) in two different contents was proven by Fourier transform infrared spectroscopy. Preparation of the hybrid PNIPAM nanogels and etching of the silica cores were studied using thermogravimetric analysis and also electron microscopy imaging. Sensitivity of the PNIPAM nanogel samples to temperature was studied using ultraviolet-visible (UV-vis) spectroscopy. In addition, dynamic light scattering was used for investigation of the squeezing and expansion of the hybrid and hollow samples against variation of temperature. The UV-vis spectroscopy results display higher absorption intensities in higher contents of MPS modifier and MBA cross-linker. The swelling content of the nanogels with hollow cavities was higher than that of the hybrid samples. The hybrid nanogels with 2 and 8 wt % silica content and different cross-linking densities and also their hollow nanoparticles were used for loading and release of doxorubicin (DOX). The release characteristics of the DOX-loaded nanogels were studied at different temperatures using UV-vis spectroscopy. The DOX release was higher at temperatures lower than the gel collapse temperature of the PNIPAM network. Although the nanogels with hollow cavities displayed higher loading capacities, the release percentage was higher for the hybrid PNIPAM nanogels, which was confirmed by the experimental release profiles and mathematical models. The most appropriate fitting of the DOX release data from the PNIPAM nanogel samples was observed for the Korsmeyer-Peppas model. Cytotoxicity studies on HeLa cell line showed that drug-loaded hollow samples showed higher toxicity due to loading of a higher amount of DOX.
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Affiliation(s)
- Sakineh Hajebi
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
- Institute of Polymeric Materials, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
| | - Amin Abdollahi
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
- Institute of Polymeric Materials, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
| | - Hossein Roghani-Mamaqani
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
- Institute of Polymeric Materials, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
| | - Mehdi Salami-Kalajahi
- Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
- Institute of Polymeric Materials, Sahand University of Technology, P.O. Box 51335-1996, 51368 Tabriz, Iran
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7
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Yakovliev A, Ziniuk R, Wang D, Xue B, Vretik LO, Nikolaeva OA, Tan M, Chen G, Slominskii YL, Qu J, Ohulchanskyy TY. Hyperspectral Multiplexed Biological Imaging of Nanoprobes Emitting in the Short-Wave Infrared Region. NANOSCALE RESEARCH LETTERS 2019; 14:243. [PMID: 31325079 PMCID: PMC6642248 DOI: 10.1186/s11671-019-3068-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/01/2019] [Indexed: 05/19/2023]
Abstract
Optical bioimaging with exogenous luminophores emitting in short-wave infrared spectral region (SWIR, ~ 1000-1700 nm) is a rapidly developing field, and the development of multiple SWIR-photoluminescent nanoprobes has recently been reported. In this regard, hyperspectral imaging (HSI), combined with unmixing algorithms, is a promising tool that can allow for efficient multiplexing of the SWIR-emitting nanoagents by their photoluminescence (PL) spectral profiles. The SWIR HSI technique reported here is developed to multiplex two types of nanoprobes: polymeric nanoparticles doped with organic dye (PNPs) and rare-earth doped fluoride nanoparticles (RENPs). Both types of nanoprobes exhibit PL in the same spectral range (~ 900-1200 nm), which hinders spectral separation of PL with optical filters and limits possibilities for their multiplexed imaging in biological tissues. By applying SWIR HSI, we exploited differences in the PL spectral profiles and achieved the spectrally selective and sensitive imaging of the PL signal from every type of nanoparticles. Unmixing of acquired data allowed for multiplexing of the spectrally overlapping nanoprobes by their PL profile. Both quantitative and spatial distribution for every type of nanoparticles were obtained from their mixed suspensions. Finally, the SWIR HSI technique with unmixing protocol was applied to in vivo imaging of mice subcutaneously injected with PNPs and RENPs. The applicability of hyperspectral techniques to multiplex nanoprobes in the in vivo imaging was successfully demonstrated.
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Affiliation(s)
- A. Yakovliev
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060 People’s Republic of China
| | - R. Ziniuk
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060 People’s Republic of China
| | - D. Wang
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060 People’s Republic of China
| | - B. Xue
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060 People’s Republic of China
| | - L. O. Vretik
- Taras Shevchenko National University of Kyiv, Kyiv, 01601 Ukraine
| | - O. A. Nikolaeva
- Taras Shevchenko National University of Kyiv, Kyiv, 01601 Ukraine
| | - M. Tan
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 People’s Republic of China
| | - G. Chen
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 People’s Republic of China
| | | | - J. Qu
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060 People’s Republic of China
| | - T. Y. Ohulchanskyy
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, Guangdong Province, 518060 People’s Republic of China
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8
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Losytskyy MY, Vretik LO, Kutsevol NV, Nikolaeva OA, Yashchuk VM. Uptake of Chlorin e 6 Photosensitizer by Polystyrene-Diphenyloxazole-Poly(N-Isopropylacrylamide) Hybrid Nanosystem Studied by Electronic Excitation Energy Transfer. NANOSCALE RESEARCH LETTERS 2018; 13:166. [PMID: 29855731 PMCID: PMC5981156 DOI: 10.1186/s11671-018-2584-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 05/24/2018] [Indexed: 05/29/2023]
Abstract
Polystyrene (PS)-diphenyloxazole (PPO) nanoparticles with attached cross-linked poly-N-isopropylacrylamide (PNIPAM) chains were obtained resulting in PS-PPO-PNIPAM hybrid nanosystems (NS). Fluorescence spectra of chlorin e6 added to PS-PPO-PNIPAM hybrid NS revealed electronic excitation energy transfer (EEET) from PS matrix and encapsulated PPO to chlorin e6. EEET efficiency increased strongly during 1 h after chlorin e6 addition, indicating that uptake of chlorin e6 by PNIPAM part of hybrid NS still proceeds during this time. Heating of PS-PPO-PNIPAM-chlorin e6 NS from 21 to 39 °C results in an enhancement of EEET efficiency; this is consistent with PNIPAM conformation transition that reduces the distance between PS-PPO donors and chlorin e6 acceptors. Meanwhile, a relatively small part of chlorin e6 present in the solution is bound by PNIPAM; thus, further studies in this direction are necessary.
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Affiliation(s)
- M Yu Losytskyy
- Faculty of Physics, Taras Shevchenko National University of Kyiv, Volodymyrs'ka Str., 64/13, Kyiv, 01601, Ukraine.
| | - L O Vretik
- Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrs'ka Str., 64/13, Kyiv, 01601, Ukraine
| | - N V Kutsevol
- Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrs'ka Str., 64/13, Kyiv, 01601, Ukraine
| | - O A Nikolaeva
- Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Volodymyrs'ka Str., 64/13, Kyiv, 01601, Ukraine
| | - V M Yashchuk
- Faculty of Physics, Taras Shevchenko National University of Kyiv, Volodymyrs'ka Str., 64/13, Kyiv, 01601, Ukraine
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9
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Brugnoni M, Scotti A, Rudov AA, Gelissen APH, Caumanns T, Radulescu A, Eckert T, Pich A, Potemkin II, Richtering W. Swelling of a Responsive Network within Different Constraints in Multi-Thermosensitive Microgels. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02722] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | - Andrey A. Rudov
- DWI - Leibniz Institute
for Interactive Materials e.V., 52056 Aachen, Germany
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | | | - Tobias Caumanns
- GFE Central Facility for Electron Microscopy, RWTH Aachen University, 52074 Aachen, Germany
| | - Aurel Radulescu
- Jülich
Centre
for Neutron Science, Outstation at MLZ, 85748 Garching, Germany
| | | | - Andrij Pich
- DWI - Leibniz Institute
for Interactive Materials e.V., 52056 Aachen, Germany
| | - Igor I. Potemkin
- DWI - Leibniz Institute
for Interactive Materials e.V., 52056 Aachen, Germany
- Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russian Federation
- National Research
South
Ural State University, 454080 Chelyabinsk, Russian Federation
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10
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Li L, Niu R, Zhang Y. Ag–Au bimetallic nanocomposites stabilized with organic–inorganic hybrid microgels: synthesis and their regulated optical and catalytic properties. RSC Adv 2018; 8:12428-12438. [PMID: 35539397 PMCID: PMC9079633 DOI: 10.1039/c8ra01343h] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 03/19/2018] [Indexed: 01/07/2023] Open
Abstract
Ag–Au bimetallic nanocomposites stabilized with organic–inorganic hybrid microgels allowed the mass transfer of reactants to be controlled by temperature modulation.
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Affiliation(s)
- Lei Li
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
| | - Rui Niu
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
| | - Ying Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710062
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11
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Dong F, Firkowska-Boden I, Arras MML, Jandt KD. Responsive copolymer–graphene oxide hybrid microspheres with enhanced drug release properties. RSC Adv 2017. [DOI: 10.1039/c6ra25353a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene oxide deposited on thermoresponsive copolymer microspheres enhances their barrier diffusion properties and drug release performance.
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Affiliation(s)
- Fuping Dong
- Chair of Materials Science
- Otto Schott Institute of Materials Research
- Faculty of Physics and Astronomy
- Friedrich Schiller University Jena
- 07743 Jena
| | - Izabela Firkowska-Boden
- Chair of Materials Science
- Otto Schott Institute of Materials Research
- Faculty of Physics and Astronomy
- Friedrich Schiller University Jena
- 07743 Jena
| | - Matthias M. L. Arras
- Chair of Materials Science
- Otto Schott Institute of Materials Research
- Faculty of Physics and Astronomy
- Friedrich Schiller University Jena
- 07743 Jena
| | - Klaus. D. Jandt
- Chair of Materials Science
- Otto Schott Institute of Materials Research
- Faculty of Physics and Astronomy
- Friedrich Schiller University Jena
- 07743 Jena
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12
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Luo J, Yuan G, Han CC. Tuning the bridging attraction between large hard particles by the softness of small microgels. SOFT MATTER 2016; 12:7863-7872. [PMID: 27714350 DOI: 10.1039/c6sm01519k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, the attraction between large hard polystyrene (PS) spheres is studied by using three types of small microgels as bridging agents. One is a purely soft poly(N-isopropylacrylamide) (PNIPAM) microgel, the other two have a non-deformable PS hard core surrounded by a soft PNIPAM shell but are different in the core-shell ratio. The affinity for bridging the large PS spheres is provided and thus affected by the PNIPAM constituent in the microgels. The bridging effects caused by the microgels can be indirectly incorporated into their influence on the effective attraction interaction between the large hard spheres, since the size of the microgels is very small in comparison to the size of the PS hard spheres. At a given volume fraction of large PS spheres, they behave essentially as hard spheres in the absence of small microgels. By gradually adding the microgels, the large spheres are connected to each other through the bridging of small particles until the attraction strength reaches a maximum value, after which adding more small particles slowly decreases the effective attraction strength and eventually the large particles disperse individually when saturated adsorption is achieved. The aggregation and gelation behaviors triggered by these three types of small microgels are compared and discussed. A way to tune the strength and range of the short-range attractive potential via changing the softness of bridging microgels (which can be achieved either by using core-shell microgels or by changing the temperature) is proposed.
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Affiliation(s)
- Junhua Luo
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangcui Yuan
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA. and Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, USA
| | - Charles C Han
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. and Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
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13
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Pafiti K, Cui Z, Carney L, Freemont AJ, Saunders BR. Composite hydrogels of polyacrylamide and crosslinked pH-responsive micrometer-sized hollow particles. SOFT MATTER 2016; 12:1116-1126. [PMID: 26610808 DOI: 10.1039/c5sm02521d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Whilst hydrogels and hollow particles both continue to attract much attention in the literature there are few examples of hydrogel composites containing hollow particles. Here, we study composite polyacrylamide (PAAm) hydrogels containing micrometer-sized pH-responsive shell-crosslinked hollow particles (abbreviated as HPXL) based on poly(methylmethacrylate-co-methacrylic acid) functionalised with glycidyl methacrylate (GMA). The HPXL particles were prepared using our scaleable emulsion template method and inclusion of GMA was found to promote spherical hollow particle formation. The pendant vinyl groups from GMA enabled shell-crosslinked hollow particles to be prepared prior to formation of the PAAm/HPXL composite gels. The morphologies of the particles and composite gels were studied by optical microscopy, confocal laser scanning microscopy and scanning electron microscopy. Dynamic rheology measurements for the composite gels showed that the modulus variation with HPXL concentration could be described by a percolation model with a HPXL percolation threshold concentration of 4.4 wt% and a scaling exponent of 2.6. The composite gels were pH-responsive and largely maintained their mechanical properties over the pH range 4.0 to 8.0. Because the composite gels had tuneable mechanical properties (with modulus values up to 530 kPa) and were pH-responsive they are potential candidates for future wound healing or membrane applications.
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Affiliation(s)
- Kyriaki Pafiti
- Biomaterials Research Group, School of Materials, The University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Zhengxing Cui
- Biomaterials Research Group, School of Materials, The University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Louise Carney
- Biomaterials Research Group, School of Materials, The University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
| | - Anthony J Freemont
- Division of Regenerative Medicine, School of Medicine, Stopford Building, The University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| | - Brian R Saunders
- Biomaterials Research Group, School of Materials, The University of Manchester, MSS Tower, Manchester, M13 9PL, UK.
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14
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Amphiphilic polymer-Ag composite microgels with tunable catalytic activity and selectivity. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3642-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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15
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Zhang J, Cui Z, Field R, Moloney MG, Rimmer S, Ye H. Thermo-responsive microcarriers based on poly(N-isopropylacrylamide). Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.04.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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16
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Dubbert J, Honold T, Pedersen JS, Radulescu A, Drechsler M, Karg M, Richtering W. How Hollow Are Thermoresponsive Hollow Nanogels? Macromolecules 2014. [DOI: 10.1021/ma502056y] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Janine Dubbert
- Institute
of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
| | - Tobias Honold
- Physical
Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Jan Skov Pedersen
- Interdisciplinary
Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, 8000 Aarhus, Denmark
| | - Aurel Radulescu
- Jülich
Centre for Neutron Science, Outstation at MLZ, 85747 Garching, Germany
| | - Markus Drechsler
- Physical
Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Matthias Karg
- Physical
Chemistry I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Walter Richtering
- Institute
of Physical Chemistry, RWTH Aachen University, 52056 Aachen, Germany
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17
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Haladjova E, Toncheva-Moncheva N, Apostolova MD, Trzebicka B, Dworak A, Petrov P, Dimitrov I, Rangelov S, Tsvetanov CB. Polymeric Nanoparticle Engineering: From Temperature-Responsive Polymer Mesoglobules to Gene Delivery Systems. Biomacromolecules 2014; 15:4377-95. [DOI: 10.1021/bm501194g] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Emi Haladjova
- Institute
of Polymers, Bulgarian Academy of Sciences, “Akad. G. Bonchev”
St. 103A, 1113 Sofia, Bulgaria
| | - Natalia Toncheva-Moncheva
- Institute
of Polymers, Bulgarian Academy of Sciences, “Akad. G. Bonchev”
St. 103A, 1113 Sofia, Bulgaria
| | - Margarita D. Apostolova
- Institute
of Molecular Biology “Roumen Tsanev”, Bulgarian Academy of Sciences, “Akad. G. Bonchev” St. 21, 1113 Sofia, Bulgaria
| | - Barbara Trzebicka
- Centre
of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, 41-819 Zabrze, Poland
| | - Andrzej Dworak
- Centre
of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, 41-819 Zabrze, Poland
| | - Petar Petrov
- Institute
of Polymers, Bulgarian Academy of Sciences, “Akad. G. Bonchev”
St. 103A, 1113 Sofia, Bulgaria
| | - Ivaylo Dimitrov
- Institute
of Polymers, Bulgarian Academy of Sciences, “Akad. G. Bonchev”
St. 103A, 1113 Sofia, Bulgaria
| | - Stanislav Rangelov
- Institute
of Polymers, Bulgarian Academy of Sciences, “Akad. G. Bonchev”
St. 103A, 1113 Sofia, Bulgaria
| | - Christo B. Tsvetanov
- Institute
of Polymers, Bulgarian Academy of Sciences, “Akad. G. Bonchev”
St. 103A, 1113 Sofia, Bulgaria
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Thermoresponsive submicron-sized core–shell hydrogel particles with encapsulated olive oil. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3309-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Chu F, Polzer F, Severin N, Lu Y, Ott A, Rabe JP, Ballauff M. Thermosensitive hollow Janus dumbbells. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3287-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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López-León T, Ortega-Vinuesa JL, Bastos-González D, Elaissari A. Thermally sensitive reversible microgels formed by poly(N-Isopropylacrylamide) charged chains: a Hofmeister effect study. J Colloid Interface Sci 2014; 426:300-7. [PMID: 24863797 DOI: 10.1016/j.jcis.2014.04.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/07/2014] [Accepted: 04/10/2014] [Indexed: 10/25/2022]
Abstract
In this study, we present a new method to obtain anionic and cationic stable colloidal nanogels from PNIPAM charged chains. The stability of the particles formed by inter-chain aggregation stems from the charged chemical groups attached at the sides of PNIPAM polymer chains. The particle formation is fully reversible-that is, it is possible to change from stable polymer solutions to stable colloidal dispersions and vice versa simply by varying temperature. In addition, we also demonstrate that the polymer LCST (lower critical solution temperature), the final particle size and the electrokinetic behavior of the particles formed are highly dependent on the electrolyte nature and salt concentration. These latter results are related to Hofmeister effects. The analysis of these results provides more insights about the origin of this ionic specificity, confirming that the interaction of ions with interfaces is dominated by the chaotropic/kosmotropic character of the ions and the hydrophobic/hydrophilic character of the surface in solution.
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Affiliation(s)
- Teresa López-León
- EC2M, UMR Gulliver CNRS-ESPCI 7083 - 10 Rue Vauquelin, F-75231 Paris Cedex 05, France
| | - Juan L Ortega-Vinuesa
- Biocolloid and Fluid Physics Group, Department of Applied Physics, University of Granada, Av. Fuentenueva S/N, 18071 Granada, Spain
| | - Delfi Bastos-González
- Biocolloid and Fluid Physics Group, Department of Applied Physics, University of Granada, Av. Fuentenueva S/N, 18071 Granada, Spain.
| | - Abdelhamid Elaissari
- University of Lyon, F-69622 Lyon, France; University of Lyon-1, Villeurbanne, CNRS, (UMR 5007), LAGEP-CPE-308G, 43 bd. du 11 Nov. 1918, F-69622 Villeurbanne, France
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Shi S, Yu Y, Wang T, Wang QM, Wang C, Kuroda SI. Poly(methyl methacrylate)/poly(N-isopropylacrylamide) core-shell particles prepared by seeded precipitation polymerization: Unusual morphology and thermo-sensitivity of zeta potential. CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1435-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Preparation of thermosensitive PNIPAM microcontainers and a versatile method to fabricate PNIPAM shell on particles with silica surface. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2697-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wang C, Wang X, Miao C, Wu Y. Preparation and properties of amphoteric polyacrylamide by seeded dispersion polymerization in ammonium sulfate solution. POLYM ENG SCI 2011. [DOI: 10.1002/pen.21959] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wang ZK, Wang D, Wang H, Yan JJ, You YZ, Wang ZG. Preparation of biocompatible nanocapsules with temperature-responsive and bioreducible properties. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12570b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Zhang L, Daniels ES, Dimonie VL, Klein A. Synthesis and characterization of PNIPAM/PS core/shell particles. J Appl Polym Sci 2010. [DOI: 10.1002/app.31508] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Zhang F, Wang CC. Preparation of P(NIPAM-co-AA) microcontainers surface-anchored with magnetic nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:8255-62. [PMID: 19348500 DOI: 10.1021/la9004467] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
P(NIPAM-co-AA) microcontainers surface-anchored with magnetic nanoparticles were prepared using PSt/P(NIPAM-co-AA) core/shell microspheres and amino-modified Fe(3)O(4)@SiO(2) particles as building blocks. At first, the PSt/P(NIPAM-co-AA) core/shell microspheres were prepared by seeded emulsion polymerization, and the amino-modified Fe(3)O(4)@SiO(2) particles were prepared by a modified Stober method followed by functionalized by 3-aminopropyltriethoxysilane. Then, the smaller amino-modified Fe(3)O(4)@SiO(2) particles were assembled onto the surface of PSt/P(NIPAM-co-AA) core/shell microspheres by electrostatic interaction. Subsequently, the two particles were permanently combined through amidation reaction between carboxylic groups and amino groups under the catalysis of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide. By dissolving the PSt core with tetrahydrofuran, novel triple-functional microcontainers with superparamagnetism and pH and temperature sensitivity were obtained.
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Affiliation(s)
- Feng Zhang
- Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
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