1
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Strauch C, Schneider S. Ionisation and swelling behaviour of weak polyampholyte core-shell networks - a Monte Carlo study. SOFT MATTER 2023; 19:938-950. [PMID: 36632835 DOI: 10.1039/d2sm01301k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The network charge of polyampholyte microgels can be tuned by varying the pH of the surrounding solution, and a charge reversal from a positively charged microgel at low pH to a negatively charged microgel at high pH can be achieved. In a titration experiment, it is difficult to tell apart the ionisation of the acidic and basic monomers in the network and to determine the distribution of charges in the network, whereas using Metropolis Monte Carlo simulations, both the degree of ionisation and the distribution of ionised monomers can be determined separately for both species. Building on our earlier work on alternating polyampholyte microgels, we now investigated the pH-dependent ionisation and the swelling behaviour of polyampholyte core-shell microgels under good solvent conditions. For this purpose, we performed Metropolis Monte Carlo simulations for a bead-spring model using the constant-pH method. As in our previous study on alternating microgels, the width of the U-shaped curve of the microgels volume as a function of pH depends on the relative dissociation constants of acid and base, and the microgel volume can be approximated by a linear function of the total network charge. Due to the spatial separation of acid and base in core-shell systems, the ionisation is less enhanced compared to a microgel with an alternating distribution of the two species. Nevertheless, we still see an influence of the presence of one species on the ionisation behaviour of the other species under good solvent conditions. Furthermore, the isoelectric point is shifted towards higher pH, which is caused by a higher charge density in the core compared to that in the shell. Added salt changes the Donnan equilibrium, which determines the counterion distribution within and outside of the microgel. At the same time, it contributes to the electrostatic screening of the network charges, leading to a narrowing of the U-shaped volume transition curve.
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Affiliation(s)
- Christian Strauch
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
| | - Stefanie Schneider
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
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2
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Hussain I, Shahid M, Ali F, Irfan A, Farooqi ZH, Begum R. Methacrylic acid based microgels and hybrid microgels. REV CHEM ENG 2022. [DOI: 10.1515/revce-2021-0075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Methacrylic acid based microgels have got much consideration in the last two decades because of their potential uses in different fields owing to their responsive behaviour towards external stimuli. Synthesis, properties and uses of methacrylic acid based microgels and their hybrids have been critically reviewed in this article. With minute change in external stimuli such as pH and ionic strength of medium, these microgels show quick swelling/deswelling reversibly. The methacrylic acid based microgels have been widely reported for applications in the area of nanotechnology, drug delivery, sensing and catalysis due to their responsive behaviour. A critical review of current research development in this field along with upcoming perception is presented here. This discussion is concluded with proposed probable future studies for additional growth in this field of research.
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Affiliation(s)
- Iftikhar Hussain
- School of Chemistry , University of the Punjab , New Campus , Lahore 54590 , Pakistan
| | - Muhammad Shahid
- School of Chemistry , University of the Punjab , New Campus , Lahore 54590 , Pakistan
| | - Faisal Ali
- School of Chemistry , University of the Punjab , New Campus , Lahore 54590 , Pakistan
- Department of Chemistry , The University of Lahore , 1-KM Defence road , Main Campus , Lahore 53700 , Pakistan
| | - Ahmad Irfan
- Research Center for Advanced Materials Science , King Khalid University , P.O. Box 9004 , Abha 61413 , Saudi Arabia
- Department of Chemistry, Faculty of Science , King Khalid University , P.O. Box 9004 , Abha 61413 , Saudi Arabia
| | - Zahoor H. Farooqi
- School of Chemistry , University of the Punjab , New Campus , Lahore 54590 , Pakistan
| | - Robina Begum
- School of Chemistry , University of the Punjab , New Campus , Lahore 54590 , Pakistan
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3
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Sasaoka M, Kawamura A, Miyata T. Core–shell Microgels Having Zwitterionic Hydrogel Core and Temperature-responsive Shell Prepared via Inverse Miniemulsion RAFT Polymerization. Polym Chem 2022. [DOI: 10.1039/d2py00425a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stimuli-responsive core–shell microgels are of significant interest because of their fascinating applications due to the different swelling/shrinkage properties of their core and shell networks. Because such stimuli-responsive core–shell microgels are...
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4
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Hofzumahaus C, Strauch C, Schneider S. Monte Carlo simulations of weak polyampholyte microgels: pH-dependence of conformation and ionization. SOFT MATTER 2021; 17:6029-6043. [PMID: 34076026 DOI: 10.1039/d1sm00433f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We performed Metropolis Monte Carlo simulations to investigate the impact of varying acid and base dissociation constants on the pH-dependent ionization and conformation of weak polyampholyte microgels under salt-free conditions and under explicit consideration of the chemical ionization equilibria of the acidic and basic groups and their electrostatic interaction. Irrespective of their relative acid and base dissociation constant, all of the microgels undergo a pH-dependent charge reversal from positive to negative with a neutral charge at the isoelectric point. This charge reversal is accompanied by a U-shaped swelling transition of the microgels with a minimum of their size at the point of charge neutrality. The width of the U-shaped swelling transition, however, is found to depend on the chosen relative acid and base dissociation constants through which the extent of the favorable electrostatic intramolecular interaction of the ionized acidic and basic groups is altered. The pH-dependent swelling transition of the microgels is found to become broader, the stronger the intramolecular electrostatic interaction of the oppositely charged ionized species is. In addition, the intramolecular charge compensation of the acidic and basic groups of the microgels allows their counterions to abandon the microgel and the associated gain in translational entropy further amplifies the broadening of the pH-dependent swelling transition. The analysis of the radial ionization profiles of the acidic and basic groups of the differently composed microgels reveals a variety of radial ionization patterns with a dependence on the overall charge of the microgels.
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Affiliation(s)
- C Hofzumahaus
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
| | - C Strauch
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
| | - S Schneider
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany.
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5
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Grinberg VY, Burova TV, Grinberg NV, Alvarez-Lorenzo C, Khokhlov AR. Protein-like energetics of conformational transitions in a polyampholyte hydrogel. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121617] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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6
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7
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Xu W, Rudov AA, Schroeder R, Portnov IV, Richtering W, Potemkin II, Pich A. Distribution of Ionizable Groups in Polyampholyte Microgels Controls Interactions with Captured Proteins: From Blockade and "Levitation" to Accelerated Release. Biomacromolecules 2019; 20:1578-1591. [PMID: 30822384 DOI: 10.1021/acs.biomac.8b01775] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A striking discovery in our work is that the distribution of ionizable groups in polyampholyte microgels (random and core-shell) controls the interactions with the captured proteins. Polyampholyte microgels are capable to switch reversibly their charges from positive to negative depending on pH. In this work, we synthesized differently structured polyampholyte microgels with controlled amounts and different distribution of acidic and basic moieties as colloidal carriers to study the loading and release of the model protein cytochrome c (cyt-c). Polyampholyte microgels were first loaded with cyt-c using the electrostatic attraction under pH 8 when the microgels were oppositely charged with respect to the protein. Then the protein release was investigated under different pH (3, 6, and 8) both with experimental methods and molecular dynamics simulations. For microgels with a random distribution of ionizable groups complete and accelerated (compared to polyelectrolyte counterpart) release of cyt-c was observed due to electrostatic repulsive interactions. For core-shell structured microgels with defined ionizable groups, it was possible to entrap the protein inside the neutral core through the formation of a positively charged shell, which acts as an electrostatic potential barrier. We postulate that this discovery allows the design of functional colloidal carriers with programmed release kinetics for applications in drug delivery, catalysis, and biomaterials.
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Affiliation(s)
- Wenjing Xu
- DWI-Leibniz Institute for Interactive Materials e.V. , Forckenbeckstraße 50 , 52074 Aachen , Germany.,Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University , Forckenbeckstraße 50 , 52074 Aachen , Germany
| | - Andrey A Rudov
- DWI-Leibniz Institute for Interactive Materials e.V. , Forckenbeckstraße 50 , 52074 Aachen , Germany.,Physics Department , Lomonosov Moscow State University , GSP-1, 1-2 Leninskiye Gory 119991 Moscow , Russian Federation
| | - Ricarda Schroeder
- DWI-Leibniz Institute for Interactive Materials e.V. , Forckenbeckstraße 50 , 52074 Aachen , Germany.,Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University , Forckenbeckstraße 50 , 52074 Aachen , Germany
| | - Ivan V Portnov
- Physics Department , Lomonosov Moscow State University , GSP-1, 1-2 Leninskiye Gory 119991 Moscow , Russian Federation
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University , Landoltweg 2 52056 Aachen , Germany
| | - Igor I Potemkin
- DWI-Leibniz Institute for Interactive Materials e.V. , Forckenbeckstraße 50 , 52074 Aachen , Germany.,Physics Department , Lomonosov Moscow State University , GSP-1, 1-2 Leninskiye Gory 119991 Moscow , Russian Federation.,National Research South Ural State University , Chelyabinsk 454080 , Russian Federation
| | - Andrij Pich
- DWI-Leibniz Institute for Interactive Materials e.V. , Forckenbeckstraße 50 , 52074 Aachen , Germany.,Functional and Interactive Polymers, Institute of Technical and Macromolecular Chemistry, RWTH Aachen University , Forckenbeckstraße 50 , 52074 Aachen , Germany.,Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University , Brightlands Chemelot Campus, Urmonderbaan22 , 6167 RD Geleen , The Netherlands
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8
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Kudaibergenov SE. Physicochemical, Complexation and Catalytic Properties of Polyampholyte Cryogels. Gels 2019; 5:gels5010008. [PMID: 30795568 PMCID: PMC6473870 DOI: 10.3390/gels5010008] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/11/2019] [Accepted: 02/18/2019] [Indexed: 12/24/2022] Open
Abstract
Polyampholyte cryogels are a less considered subject in comparison with cryogels based on nonionic, anionic and cationic precursors. This review is devoted to physicochemical behavior, complexation ability and catalytic properties of cryogels based on amphoteric macromolecules. Polyampholyte cryogels are able to exhibit the stimuli-responsive behavior and change the structure and morphology in response to temperature, pH of the medium, ionic strength and water–organic solvents. Moreover, they can uptake transition metal ions, anionic and cationic dyes, ionic surfactants, polyelectrolytes, proteins, and enzymes through formation of coordination bonds, hydrogen bonds, and electrostatic forces. The catalytic properties of polyampholyte cryogels themselves and with immobilized metal nanoparticles suspended are outlined following hydrolysis, transesterification, hydrogenation and oxidation reactions of various substrates. Application of polyampholyte cryogels as a protein-imprinted matrix for separation and purification of biomacromolecules and for sustained release of proteins is demonstrated. Comparative analysis of the behavior of polyampholyte cryogels with nonionic, anionic and cationic precursors is given together with concluding remarks.
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Affiliation(s)
- Sarkyt E Kudaibergenov
- Institute of Polymer Materials and Technology, Microregion "Atyrau 1", house 3/1, Almaty 050019, Kazakhstan.
- Laboratory of Engineering Profile, K.I. Satpayev Kazakh National Research Technical University, Satpayev Str. 22, Almaty 050013, Kazakhstan.
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9
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Willems C, Pargen S, Balaceanu A, Keul H, Möller M, Pich A. Stimuli responsive microgels decorated with oligoglycidol macromonomers: Synthesis, characterization and properties in aqueous solution. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.02.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Kumar V, Singh A, Das TK, Sarkar DJ, Singh SB, Dhaka R, Kumar A. Release behavior and bioefficacy of imazethapyr formulations based on biopolymeric hydrogels. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2017; 52:402-409. [PMID: 28272993 DOI: 10.1080/03601234.2017.1293446] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Controlled release formulations of imazethapyr herbicide have been developed employing guar gum-g-cl-polyacrylate/bentonite clay hydrogel composite (GG-HG) and guar gum-g-cl-PNIPAm nano hydrogel (GG-NHG) as carriers, to assess the suitability of biopolymeric hydrogels as controlled herbicide release devices. The kinetics of imazethapyr release from the developed formulations was studied in water and it revealed that the developed formulations of imazethapyr behaved as slow release formulations as compared to commercial formulation. The calculated diffusion exponent (n) values showed that Fickian diffusion was the predominant mechanism of imazethapyr release from the developed formulations. Time for release of half of the loaded imazethapyr (t1/2) ranged between 0.06 and 4.8 days in case of GG-NHG and 4.4 and 12.6 days for the GG-HG formulations. Weed control index (WCI) of GG-HG and GG-NHG formulations was similar to that of the commercial formulation and the herbicidal effect was observed for relatively longer period. Guar gum-based biopolymeric hydrogels in both macro and nano particle size range can serve as potential carriers in developing slow release herbicide formulations.
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Affiliation(s)
- Vikas Kumar
- a Division of Agricultural Chemicals , ICAR-Indian Agricultural Research Institute , New Delhi , India
| | - Anupama Singh
- a Division of Agricultural Chemicals , ICAR-Indian Agricultural Research Institute , New Delhi , India
| | - T K Das
- b Division of Agronomy , ICAR-Indian Agricultural Research Institute , New Delhi , India
| | - Dhruba Jyoti Sarkar
- a Division of Agricultural Chemicals , ICAR-Indian Agricultural Research Institute , New Delhi , India
| | - Shashi Bala Singh
- a Division of Agricultural Chemicals , ICAR-Indian Agricultural Research Institute , New Delhi , India
| | - Rashmi Dhaka
- a Division of Agricultural Chemicals , ICAR-Indian Agricultural Research Institute , New Delhi , India
| | - Anil Kumar
- c Division of Design of Experiments , ICAR-Indian Agricultural Statistics Research Institute , New Delhi , India
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11
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Rudov AA, Gelissen APH, Lotze G, Schmid A, Eckert T, Pich A, Richtering W, Potemkin II. Intramicrogel Complexation of Oppositely Charged Compartments As a Route to Quasi-Hollow Structures. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00553] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andrey A. Rudov
- Physics
Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
- DWI—Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
| | | | - Gudrun Lotze
- High
Brilliance Beamline ID02, ESRF—The European Synchrotron, 71, Avenue des Martyrs, CS40220, 38043 Grenoble Cedex 9, France
| | - Andreas Schmid
- Institute of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Thomas Eckert
- Institute of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Andrij Pich
- DWI—Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
- Institute
of Technical and Macromolecular Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Igor I. Potemkin
- Physics
Department, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow 119991, Russian Federation
- DWI—Leibniz Institute for Interactive Materials e.V., Forckenbeckstraße 50, Aachen 52056, Germany
- National Research South Ural State University, Chelyabinsk 454080, Russian Federation
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12
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Abstract
This review summarizes pH-responsive monomers, polymers and their derivative nano- and micro-structures including micelles, cross-linked micelles, microgels and hydrogels.
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Affiliation(s)
- G. Kocak
- Department of Chemistry
- Faculty of Arts and Science
- Eskisehir Osmangazi University
- Eskisehir
- Turkey
| | - C. Tuncer
- Department of Chemistry
- Faculty of Arts and Science
- Eskisehir Osmangazi University
- Eskisehir
- Turkey
| | - V. Bütün
- Department of Chemistry
- Faculty of Arts and Science
- Eskisehir Osmangazi University
- Eskisehir
- Turkey
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13
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Affiliation(s)
- Natasha Kamerlin
- Department
of Chemistry - Ångström Laboratory, Physical Chemistry, Uppsala University, Box
523, S-751 20 Uppsala, Sweden
- Department
of Mathematics, Uppsala University, Box 480, S-751 06 Uppsala, Sweden
| | - Christer Elvingson
- Department
of Chemistry - Ångström Laboratory, Physical Chemistry, Uppsala University, Box
523, S-751 20 Uppsala, Sweden
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14
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Kudaibergenov SE, Tatykhanova GS, Klivenko AN. Complexation of macroporous amphoteric cryogels based onN,N-dimethylaminoethyl methacrylate and methacrylic acid with dyes, surfactant, and protein. J Appl Polym Sci 2016. [DOI: 10.1002/app.43784] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sarkyt E. Kudaibergenov
- Laboratory of Engineering Profile; Kazakh National Technical Research University n/a K.I. Satpayev; Satpayev Str. 22 Almaty 050013 Republic of Kazakhstan
- Institute of Polymer Materials and Technology; Satpayev Str. 22 Almaty 050013 Republic of Kazakhstan
| | - Gulnur S. Tatykhanova
- Laboratory of Engineering Profile; Kazakh National Technical Research University n/a K.I. Satpayev; Satpayev Str. 22 Almaty 050013 Republic of Kazakhstan
- Institute of Polymer Materials and Technology; Satpayev Str. 22 Almaty 050013 Republic of Kazakhstan
| | - Alexey N. Klivenko
- al-Farabi Kazakh National University; al-Farabi Av. 71 Almaty 050040 Republic of Kazakhstan
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15
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Barcellona MN, Johnson N, Bernards MT. Characterizing Drug Release from Nonfouling Polyampholyte Hydrogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:13402-13409. [PMID: 26606238 DOI: 10.1021/acs.langmuir.5b03597] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Controlled delivery of bioactive signaling molecules and drugs is essential for the development of the next generation of tissue regeneration scaffolds. However, these molecules must be delivered from a nonfouling platform, so that the therapeutic role is not masked by the naturally occurring foreign body response. Therefore, the purpose of this study is to characterize the release profiles of three pseudodrug molecules from a nonfouling polyampholyte hydrogel to gain insight into the potential for this platform to serve as a tissue regeneration scaffold. Hydrogels composed of equimolar concentrations of [2-(acryloyloxy)ethyl] trimethylammonium chloride (TMA) and 2-carboxyethyl acrylate (CAA) monomers were synthesized in the presence of caffeine, methylene blue, or metanil yellow. Then the release of these three molecules was tracked as a function of the hydrogel cross-linker density, the solution pH, and the solution ionic strength. The results suggest that the release of the neutral caffeine molecule is dictated by diffusion alone, while the release of the two charged pseudodrug molecules are controlled by their interactions with the charged regions of the TMA and CAA monomer subunits. These interactions are clearly impacted by solution pH and ionic strength leading to clear changes in the rate of release and extent of release for metanil yellow and methylene blue. Additionally, an enzyme-linked immunosorbent assay was used to confirm that the TMA:CAA hydrogels retain their nonfouling characteristics following the release of the pseudodrug molecules. When these results are combined with the literature related to TMA:CAA hydrogels, it is concluded that this system represents a promising multifunctional platform for both short-term and long-term delivery of bioactive molecules for tissue regeneration.
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Affiliation(s)
- Marcos N Barcellona
- Department of Bioengineering and ‡Department of Chemical Engineering, University of Missouri , Columbia, Missouri 65211, United States
| | - Nicholas Johnson
- Department of Bioengineering and ‡Department of Chemical Engineering, University of Missouri , Columbia, Missouri 65211, United States
| | - Matthew T Bernards
- Department of Bioengineering and ‡Department of Chemical Engineering, University of Missouri , Columbia, Missouri 65211, United States
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16
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Yu T, Geng S, Li H, Wan J, Peng X, Liu W, Zhao Y, Yang X, Xu H. The stimuli-responsive multiphase behavior of core–shell nanogels with opposite charges and their potential application in in situ gelling system. Colloids Surf B Biointerfaces 2015; 136:99-104. [DOI: 10.1016/j.colsurfb.2015.08.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 07/27/2015] [Accepted: 08/25/2015] [Indexed: 10/23/2022]
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17
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Karabacak RB. Emulsifier-free poly[2-(diethylamino)ethyl methacrylate] microgels with cationic quaternary ammonium monomers. J Appl Polym Sci 2015. [DOI: 10.1002/app.43196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- R. Bengü Karabacak
- Department of Chemistry; Anadolu University; Eskişehir 26470 Turkey
- Göztepe Mh; Dumlupınar Cd. No: 109/8 Eskişehir Turkey
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18
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Xun W, Richtering W. Dilution leading to viscosity increase based on the cononsolvency effect of temperature-sensitive microgel suspensions. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Schroeder R, Rudov AA, Lyon LA, Richtering W, Pich A, Potemkin II. Electrostatic Interactions and Osmotic Pressure of Counterions Control the pH-Dependent Swelling and Collapse of Polyampholyte Microgels with Random Distribution of Ionizable Groups. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01305] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ricarda Schroeder
- DWI−Leibniz Institute for Interactive Materials e.V., Aachen 52056, Germany
- Functional
and Interactive Polymers, Institute of Technical and Macromolecular
Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Andrey A. Rudov
- DWI−Leibniz Institute for Interactive Materials e.V., Aachen 52056, Germany
- Physics
Department, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - L. Andrew Lyon
- Schmid
College of Science and Technology, Chapman University, Orange, California 92866, United States
| | - Walter Richtering
- Institute
of Physical Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Andrij Pich
- DWI−Leibniz Institute for Interactive Materials e.V., Aachen 52056, Germany
- Functional
and Interactive Polymers, Institute of Technical and Macromolecular
Chemistry, RWTH Aachen University, Aachen 52056, Germany
| | - Igor I. Potemkin
- DWI−Leibniz Institute for Interactive Materials e.V., Aachen 52056, Germany
- Physics
Department, Lomonosov Moscow State University, Moscow 119991, Russian Federation
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20
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One step poly(quercetin) particle preparation as biocolloid and its characterization. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.03.097] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Affiliation(s)
- Kevin M. Zurick
- Department of Chemical Engineering; University of Missouri; Columbia Missouri 65211
| | - Matthew Bernards
- Department of Chemical Engineering; University of Missouri; Columbia Missouri 65211
- Department of Bioengineering; University of Missouri; Columbia Missouri 65211
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22
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Tatykhanova GS, Sadakbayeva ZK, Berillo D, Galaev I, Abdullin KA, Adilov Z, Kudaibergenov SE. Metal Complexes of Amphoteric Cryogels Based on Allylamine and Methacrylic Acid. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/masy.201100065] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Yang YQ, Lin WJ, Zhao B, Wen XF, Guo XD, Zhang LJ. Synthesis and physicochemical characterization of amphiphilic triblock copolymer brush containing pH-sensitive linkage for oral drug delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:8251-8259. [PMID: 22568600 DOI: 10.1021/la301099q] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A novel and well-defined pH-sensitive amphiphilic triblock copolymer brush poly(lactide)-b-poly(methacrylic acid)-b-poly(poly(ethylene glycol) methyl ether monomethacrylate) (PLA-b-PMAA-b-PPEGMA) and its self-assembled micelles were developed for oral administration of hydrophobic drugs. The copolymer and its precursors were synthesized by the combination of activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) and ring-opening polymerization (ROP) techniques. The molecular structures and characteristics were confirmed by GPC, (1)H NMR, and FT-IR. The critical micelle concentration (CMC) values of PLA-b-PMAA-b-PPEGMA in aqueous medium varied from 1.4 to 2.6 mg/L, and the partition equilibrium constant (K(v)) of pyrene in micellar solutions ranged from 2.873 × 10(5) to 3.312 × 10(5). The average sizes of the self-assembled blank and drug-loaded micelles were 140-250 nm determined by DLS in aqueous solution. The morphology of the micelles was found to be spherical by SEM. Nifedipine (NFD), a poorly water-soluble drug, was selected as the model drug and wrapped into the core of micelles via dialysis method. The in vitro release behavior of NFD from the micelles was pH-dependent. In simulated gastric fluid (SGF, pH 1.2), the cumulative release percent of NFD was relative low, while in simulated intestinal fluid (SIF, pH 7.4), more than 96% was released within 24 h. All the results showed that the pH-sensitive PLA-b-PMAA-b-PPEGMA micelle may be a prospective candidate as oral drug delivery carrier for hydrophobic drugs with controlled release behavior.
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Affiliation(s)
- You Qiang Yang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P R China
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Dhar N, Akhlaghi SP, Tam KC. Biodegradable and biocompatible polyampholyte microgels derived from chitosan, carboxymethyl cellulose and modified methyl cellulose. Carbohydr Polym 2012; 87:101-109. [DOI: 10.1016/j.carbpol.2011.07.022] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 06/06/2011] [Accepted: 07/13/2011] [Indexed: 11/28/2022]
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Panagiotou T, Fisher RJ. Bottom up Nano-particle Formation via Controlled Crystallization and Chemical Reactions. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/opl.2011.1343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
ABSTRACTMany manufacturing techniques to produce nano-materials via a “bottom-up” approach are currently being developed and evaluated. The PureNanoTM platform technology developed by Microfluidics International Corporation (MFIC) has proven to be both an effective and energy efficient method to produce nano-scale entities including emulsions in addition to suspensions. This nano-manufacturing platform utilizes crystallization, precipitation and chemical reaction methods that produce nano-particles with specified size distributions and a desired morphology. The solids formed can be either amorphous or crystalline, which may exist in numerous polymorphs. In many cases the ability to obtain a specific composition (single species or mixture) is possible via careful selection and implementation of key processing conditions. The methods are based on controlling the local degree of super-saturation (SS) and/or stoichiometry during their formation and subsequent configuration and growth, when appropriate. To accomplish this, operational strategies and innovative processing techniques are coupled with qualitative insight into the basic mechanisms involved with these processes. Validation of the technology at the bench scale for crystallization, emulsions/cargo loading, and multi-phase reactions (interfacial and homogeneous) provided the justification to develop commercial scale systems. Examples are given here for crystallization of drugs for the pharmaceutical industry, a catalyst formed by deposition of metallic crystals on a carbon substrate, production of fine chemicals via emulsion formation for multi-phase reactions, and a homogeneous substitution reaction forming an insoluble product. Nano-materials with median particle size as low as 50 nm were produced. With respect to the drug particles, they were highly crystalline, of a single polymorph and pure. In all cases, results indicate both process performance enhancement and product quality/functionality improvements compared to materials produced with conventional methods, with at least 1-2 order of magnitude increases in surface/interfacial area and reduced energy needs. Furthermore, the technology is suitable for current Good Manufacturing Practices (cGMP) manufacturing.
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Enhanced Transport Capabilities via Nanotechnologies: Impacting Bioefficacy, Controlled Release Strategies, and Novel Chaperones. JOURNAL OF DRUG DELIVERY 2011; 2011:902403. [PMID: 21603220 PMCID: PMC3095449 DOI: 10.1155/2011/902403] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Revised: 02/22/2011] [Accepted: 02/23/2011] [Indexed: 02/06/2023]
Abstract
Emerging nanotechnologies have, and will continue to have, a major impact on the pharmaceutical industry. Their influence on a drug's life cycle, inception to delivery, is
rapidly expanding. As the industry moves more aggressively toward continuous
manufacturing modes, utilizing Process Analytical Technology (PAT) and Process
Intensification (PI) concepts, the critical role of transport phenomena becomes elucidated.
The ability to transfer energy, mass, and momentum with directed purposeful outcomes is
a worthwhile endeavor in establishing higher production rates more economically.
Furthermore, the ability to obtain desired drug properties, such as size, habit, and
morphology, through novel manufacturing strategies permits unique formulation control
for optimum delivery methodologies. Bottom-up processing to obtain nano-sized crystals
is an excellent example. Formulation and delivery are intimately coupled in improving
bio-efficacy at reduced loading and/or better controlled release capabilities, minimizing
side affects and providing improved therapeutic interventions. Innovative nanotechnology applications, such as simultaneous targeting, imaging and delivery to tumors, are now possible through use of novel chaperones. Other examples include nanoparticles attachment to T-cells, release from novel hydrogel implants, and functionalized encapsulants. Difficult tasks such as drug delivery to the brain via the blood brain barrier and/or the cerebrospinal fluid are now easier to accomplish.
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Affiliation(s)
- Xiaobo Hu
- School of Chemistry & Biochemistry and the Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Research Institute of Material Science, South China University of Technology, Guangzhou 510640, P. R. China
| | - Zhen Tong
- School of Chemistry & Biochemistry and the Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Research Institute of Material Science, South China University of Technology, Guangzhou 510640, P. R. China
| | - L. Andrew Lyon
- School of Chemistry & Biochemistry and the Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, and Research Institute of Material Science, South China University of Technology, Guangzhou 510640, P. R. China
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Schachschal S, Balaceanu A, Melian C, Demco DE, Eckert T, Richtering W, Pich A. Polyampholyte Microgels with Anionic Core and Cationic Shell. Macromolecules 2010. [DOI: 10.1021/ma100184h] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Susann Schachschal
- Department of Macromolecular Chemistry, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Andreea Balaceanu
- DWI RWTH Aachen e.V., Institut of Technical and Macromolekular Chemistry, RWTH Aachen University, Pauwelsstr. 8, D-52056 Aachen, Germany
| | - Claudiu Melian
- DWI RWTH Aachen e.V., Institut of Technical and Macromolekular Chemistry, RWTH Aachen University, Pauwelsstr. 8, D-52056 Aachen, Germany
| | - Dan E. Demco
- DWI RWTH Aachen e.V., Institut of Technical and Macromolekular Chemistry, RWTH Aachen University, Pauwelsstr. 8, D-52056 Aachen, Germany
| | - Thomas Eckert
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany
| | - Walter Richtering
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056 Aachen, Germany
| | - Andrij Pich
- DWI RWTH Aachen e.V., Institut of Technical and Macromolekular Chemistry, RWTH Aachen University, Pauwelsstr. 8, D-52056 Aachen, Germany
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Sanson N, Rieger J. Synthesis of nanogels/microgels by conventional and controlled radical crosslinking copolymerization. Polym Chem 2010. [DOI: 10.1039/c0py00010h] [Citation(s) in RCA: 177] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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