1
|
Parcero-Bouzas S, Correa J, Jimenez-Lopez C, Delgado Gonzalez B, Fernandez-Megia E. Modular Synthesis of PEG-Dendritic Block Copolymers by Thermal Azide-Alkyne Cycloaddition with Internal Alkynes and Evaluation of their Self-Assembly for Drug Delivery Applications. Biomacromolecules 2024; 25:2780-2791. [PMID: 38613487 PMCID: PMC11094729 DOI: 10.1021/acs.biomac.3c01429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/03/2024] [Accepted: 04/03/2024] [Indexed: 04/15/2024]
Abstract
Linear-dendritic block copolymers assemble in solution due to differences in the solubility or charge properties of the blocks. The monodispersity and multivalency of the dendritic block provide unparalleled control for the design of drug delivery systems when incorporating poly(ethylene glycol) (PEG) as a linear block. An accelerated synthesis of PEG-dendritic block copolymers based on the click and green chemistry pillars is described. The tandem composed of the thermal azide-alkyne cycloaddition with internal alkynes and azide substitution is revealed as a flexible, reliable, atom-economical, and user-friendly strategy for the synthesis and functionalization of biodegradable (polyester) PEG-dendritic block copolymers. The high orthogonality of the sequence has been exploited for the preparation of heterolayered copolymers with terminal alkenes and alkynes, which are amenable for subsequent functionalization by thiol-ene and thiol-yne click reactions. Copolymers with tunable solubility and charge were so obtained for the preparation of various types of nanoassemblies with promising applications in drug delivery.
Collapse
Affiliation(s)
- Samuel Parcero-Bouzas
- Centro Singular de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS),
Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n, Santiago de Compostela 15782, Spain
| | - Juan Correa
- Centro Singular de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS),
Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n, Santiago de Compostela 15782, Spain
| | - Celia Jimenez-Lopez
- Centro Singular de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS),
Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n, Santiago de Compostela 15782, Spain
| | - Bruno Delgado Gonzalez
- Centro Singular de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS),
Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n, Santiago de Compostela 15782, Spain
| | - Eduardo Fernandez-Megia
- Centro Singular de Investigación
en Química Biolóxica e Materiais Moleculares (CIQUS),
Departamento de Química Orgánica, Universidade de Santiago de Compostela, Jenaro de la Fuente s/n, Santiago de Compostela 15782, Spain
| |
Collapse
|
2
|
Gineste S, Mingotaud C. Double-hydrophilic block copolymer-metal ion associations: Structures, properties and applications. Adv Colloid Interface Sci 2023; 311:102808. [PMID: 36442323 DOI: 10.1016/j.cis.2022.102808] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/17/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022]
Abstract
Hybrid polyionic complexes (HPICs), constructed from double-hydrophilic block copolymers and metal ions, have been largely developed with increasing interest in the past decade in the fields of catalysis, materials science and biological applications. The chemical natures of both blocks are very versatile, but one block should be able to interact with ions, and the second one should be neutral. Many metals have been used to form HPICs, which have, in their simplest architectural form, a core-shell structure of a few tens of nanometers in radius with an external shell made of the neutral block of the copolymer. In this review, we focus our discussion on the stability, shape, size and inner structure of these hybrid micelles. We then describe the most recent applications of HPICs, as reported in the literature, and point out the current challenges, missing structural information and future perspectives for this class of organized structures.
Collapse
Affiliation(s)
- Stéphane Gineste
- Laboratoire des IMRCP, CNRS UMR 5623, University of Toulouse, Université Toulouse III - Paul Sabatier, 118, route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Christophe Mingotaud
- Laboratoire des IMRCP, CNRS UMR 5623, University of Toulouse, Université Toulouse III - Paul Sabatier, 118, route de Narbonne, 31062 Toulouse Cedex 9, France.
| |
Collapse
|
3
|
Cantarano A, Yao J, Matulionyte M, Lifante J, Benayas A, Ortgies DH, Vetrone F, Ibanez A, Gérardin C, Jaque D, Dantelle G. Autofluorescence-Free In Vivo Imaging Using Polymer-Stabilized Nd 3+-Doped YAG Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2020; 12:51273-51284. [PMID: 33156603 DOI: 10.1021/acsami.0c15514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Neodymium-doped yttrium aluminum garnet (YAG:Nd3+) has been widely developed during roughly the past 60 years and has been an outstanding fluorescent material. It has been considered as the gold standard among multipurpose solid-state lasers. Yet, the successful downsizing of this system into the nanoregimen has been elusive, so far. Indeed, the synthesis of a garnet structure at the nanoscale, with enough crystalline quality for optical applications, was found to be quite challenging. Here, we present an improved solvothermal synthesis method producing YAG:Nd3+ nanocrystals of remarkably good structural quality. Adequate surface functionalization using asymmetric double-hydrophilic block copolymers, constituted of a metal-binding block and a neutral water-soluble block, provides stabilized YAG:Nd3+ nanocrystals with long-term colloidal stability in aqueous suspensions. These newly stabilized nanoprobes offer spectroscopic quality (long lifetimes, narrow emission lines, and large Stokes shifts) close to that of bulk YAG:Nd3+. The narrow emission lines of YAG:Nd3+ nanocrystals are exploited by differential infrared fluorescence imaging, thus achieving an autofluorescence-free in vivo readout. In addition, nanothermometry measurements, based on the ratiometric fluorescence of the stabilized YAG:Nd3+ nanocrystals, are demonstrated. The progress here reported paves the way for the implementation of this new stabilized YAG:Nd3+ system in the preclinical arena.
Collapse
Affiliation(s)
- Alexandra Cantarano
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Jingke Yao
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
| | - Marija Matulionyte
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, 1650 Boul. Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada
| | - José Lifante
- Fluorescence Imaging Group, Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Avda. Arzobispo Morcillo, 2, Madrid 28029, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Antonio Benayas
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Dirk H Ortgies
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Fiorenzo Vetrone
- Institut National de la Recherche Scientifique, Centre Énergie, Matériaux et Télécommunications, Université du Québec, 1650 Boul. Lionel-Boulet, Varennes (Québec) J3X 1S2, Canada
| | - Alain Ibanez
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| | - Corine Gérardin
- ICGM, Univ. Montpellier, CNRS UMR 5253, ENSCM, 240 Avenue E. Jeanbrau, 34296 Montpellier cedex 5, France
| | - Daniel Jaque
- Fluorescence Imaging Group, Departamento de Física de Materiales, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria IRYCIS, Ctra. Colmenar km 9.100, 28034 Madrid, Spain
| | - Géraldine Dantelle
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, 38000 Grenoble, France
| |
Collapse
|
4
|
Mestivier M, Li JR, Camy A, Frangville C, Mingotaud C, Benoît‐Marquié F, Marty J. Copper‐Based Hybrid Polyion Complexes for Fenton‐Like Reactions. Chemistry 2020; 26:14152-14158. [DOI: 10.1002/chem.202002362] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Mathieu Mestivier
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Jun Rong Li
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Aurèle Camy
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Camille Frangville
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Christophe Mingotaud
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Florence Benoît‐Marquié
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| | - Jean‐Daniel Marty
- IMRCP UMR CNRS 5623 Bat 2R1 Université de Toulouse 118 Route de Narbonne 31062 Toulouse Cedex 9 France
| |
Collapse
|
5
|
Abstract
Proteins are ubiquitous in life and next to water, they are the most abundant compounds found in human bodies. Proteins have very specific roles in the body and depending on their function, they are for example classified as enzymes, antibodies or transport proteins. Recently, therapeutic proteins have made an impact in the drug market. However, some proteins can be subject to quick hydrolytic degradation or denaturation depending on the environment and therefore require a protective layer. A range of strategies are available to encapsulate and deliver proteins, but techniques based on polyelectrolyte complex formation stand out owing to their ease of formulation. Depending on their isoelectric point, proteins are charged and can condense with oppositely charged polymers. Using block copolymers with a neutral block and a charged block results in the formation of polyion complex (PIC) micelles when mixed with the oppositely charged protein. The neutral block stabilises the charged protein–polymer core, leading to nanoparticles. The types of micelles are also known under the names interpolyelectrolyte complex, complex coacervate core micelles, and block ionomer complexes. In this article, we discuss the formation of PIC micelles and their stability. Strategies to enhance the stability such as supercharging the protein or crosslinking the PIC micelles are discussed.
Collapse
|
6
|
Abolmaali SS, Tamaddon AM, Salmanpour M, Mohammadi S, Dinarvand R. Block ionomer micellar nanoparticles from double hydrophilic copolymers, classifications and promises for delivery of cancer chemotherapeutics. Eur J Pharm Sci 2017; 104:393-405. [PMID: 28416470 DOI: 10.1016/j.ejps.2017.04.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/11/2017] [Accepted: 04/13/2017] [Indexed: 12/11/2022]
Abstract
A class of double hydrophilic copolymers comprising ionic and nonionic water-soluble blocks, which are also called block ionomers, represent an interesting type of polymer assembly forming stable, homogeneous core-corona dispersions. They exhibit the solution behavior of normal polyelectrolytes, whereas assembly into micelle, vesicle or disk morphology happens by an external stimulus (pH, temperature or ionic strength) or complex formation with metal ions, ionic surfactants, polyelectrolytes, etc. Temperature, pH, redox or salt sensitivity affords a unique opportunity to control the triggered release of payloads accommodated through electrostatic interaction, coordination or chemical conjugation. Moreover, the non-ionic block provides the surface passivation, prolongation of the blood circulation and tumor accumulation, supporting targeted delivery of chemotherapeutic agents based on pathophysiology of tumor microenvironment. Potentiation of antitumor activity, sensitization of the resistant tumors, increased tolerated dose and translation into clinical practice are among their most intriguing characteristics. Their high functionality has been suggested for co-delivery of multiple agents for reversal of chemo-resistance as well as simultaneous therapy and diagnostics. Nevertheless, some stability concerns may be raised due to the polymer disassembly beyond a critical concentration of pH, salt and polyion concentration that can be modulated by introducing crosslinks between the polymer chains (Nano-networks).
Collapse
Affiliation(s)
- S S Abolmaali
- Pharmaceutical Nanotechnology Department, Shiraz University of Medical Sciences, Shiraz 71345, Iran
| | - A M Tamaddon
- Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz 71345, Iran.
| | - M Salmanpour
- Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz 71345, Iran
| | - S Mohammadi
- Center for Nanotechnology in Drug Delivery, Shiraz University of Medical Sciences, Shiraz 71345, Iran
| | - R Dinarvand
- Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 14174, Iran.
| |
Collapse
|
7
|
Yamamoto S, Yuba E, Harada A, Kono K. Effective Condensation of Multivalent Anions into Polyion Complex Micelles Prepared from TiO₂ Nanoparticles and Polyallylamine Bearing Poly(ethylene glycol) Grafts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8583-8588. [PMID: 26186489 DOI: 10.1021/acs.langmuir.5b01883] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Physicochemical properties were evaluated for polyion complex micelles (PIC), which were prepared from TiO2 nanoparticles and polyallylamine bearing poly(ethylene glycol) grafts (PAA-g-PEG). The zeta potentials of PIC micelles prepared using PAA-g-PEG with different molecular weights of PEG grafts were measured in different aqueous media (i.e., water, phosphate buffer, and Tris/HCl buffer). The PIC micelles in phosphate buffer and Tris/HCl buffer exhibited quite different zeta potentials despite the same salt concentration (10 mM) of the buffer solutions. More specifically, the zeta potential of the PIC micelles in phosphate buffer was effectively neutralized owing to counteranion condensation effects. The onset of counterion condensation into the PIC micelles was dependent on the valence of the anionic molecules and the ability of the PIC micelles to entrap multivalent anionic molecules. Furthermore, as confirmed by laser confocal microscopy observation, multivalent anionic molecules could be delivered to cultured cells through entrapment in the PIC micelles based on multivalent anion condensation effects.
Collapse
Affiliation(s)
- Satoshi Yamamoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Eiji Yuba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Atsushi Harada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kenji Kono
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| |
Collapse
|
8
|
Effect of l-Histidine Substitution on Sol–Gel of Transition Metal Coordinated Poly Ethyleneimine: Synthesis and Biochemical Characterization. J Inorg Organomet Polym Mater 2014. [DOI: 10.1007/s10904-014-0067-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
9
|
Yoon H, Dell EJ, Freyer JL, Campos LM, Jang WD. Polymeric supramolecular assemblies based on multivalent ionic interactions for biomedical applications. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.12.038] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
10
|
Polymeric micelles based on poly(methacrylic acid) block-containing copolymers with different membrane destabilizing properties for cellular drug delivery. Int J Pharm 2013; 454:611-20. [PMID: 23792466 DOI: 10.1016/j.ijpharm.2013.06.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 05/30/2013] [Accepted: 06/03/2013] [Indexed: 11/22/2022]
Abstract
Poly(methacrylic acid)-b-poly(ethylene oxide) are double hydrophilic block copolymers, which are able to form micelles by complexation with a counter-polycation, such as poly-l-lysine. A study was carried out on the ability of the copolymers to interact with model membranes as a function of their molecular weights and as a function of pH. Different behaviors were observed: high molecular weight copolymers respect the membrane integrity, whereas low molecular weight copolymers with a well-chosen asymmetry degree can induce a membrane alteration. Hence by choosing the appropriate molecular weight, micelles with distinct membrane interaction behaviors can be obtained leading to different intracellular traffics with or without endosomal escape, making them interesting tools for cell engineering. Especially micelles constituted of low molecular weight copolymers could exhibit the endosomal escape property, which opens vast therapeutic applications. Moreover micelles possess a homogeneous nanometric size and show variable properties of disassembly at acidic pH, of stability in physiological conditions, and finally of cyto-tolerance.
Collapse
|
11
|
Tarasov K, Houssein D, Destarac M, Marcotte N, Gérardin C, Tichit D. Stable aqueous colloids of ZnS quantum dots prepared using double hydrophilic block copolymers. NEW J CHEM 2013. [DOI: 10.1039/c2nj40738h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
12
|
Pereira RFP, Valente AJM, Burrows HD, de Zea Bermudez V, Carvalho RA, Castro RAE. Structural characterization of solid trivalent metal dodecyl sulfates: from aqueous solution to lamellar superstructures. RSC Adv 2013. [DOI: 10.1039/c2ra21906a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
13
|
Han Y, Xia L, Zhu L, Zhang S, Li Z, Wang Y. Association behaviors of dodecyltrimethylammonium bromide with double hydrophilic block co-polymer poly(ethylene glycol)-block-poly(glutamate sodium). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:15134-15140. [PMID: 23057580 DOI: 10.1021/la303646r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The association behaviors of single-chain surfactant dodecyltrimethylammonium bromide (DTAB) with double hydrophilic block co-polymers poly(ethylene glycol)-b-poly(sodium glutamate) (PEG(113)-PGlu(50) or PEG(113)-PGlu(100)) were investigated using isothermal titration microcalorimetry, cryogenic transmission electron microscopy, circular dichroism, ζ potential, and particle size measurements. The electrostatic interaction between DTAB and the oppositely charged carboxylate groups of PEG-PGlu induces the formation of super-amphiphiles, which further self-assemble into ordered aggregates. Dependent upon the charge ratios between DTAB and the glutamic acid residue of the co-polymer, the mixture solutions can change from transparent to opalescent without precipitation. Dependent upon the chain length of the PGlu block, the mixture of DTAB and PEG-PGlu diblocks can form two different aggregates at their corresponding electroneutral point. Spherical and rod-like aggregates are formed in the PEG(113)-PGlu(50)/DTAB mixture, while the vesicular aggregates are observed in the PEG(113)-PGlu(100)/DTAB mixture solution. Because the PEG(113)-PGlu(100)/DTAB super-amphiphile has more hydrophobic components than that of the PEG(113)-PGlu(50)/DTAB super-amphiphile, the former prefers forming the ordered aggregates with higher curvature, such as spherical and rod aggregates, but the latter prefers forming vesicular aggregates with lower curvature.
Collapse
Affiliation(s)
- Yuchun Han
- Beijing National Laboratory of Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | | | | | | | | | | |
Collapse
|
14
|
Physicochemical properties of pH-controlled polyion complex (PIC) micelles of poly(acrylic acid)-based double hydrophilic block copolymers and various polyamines. Anal Bioanal Chem 2012; 403:1395-404. [DOI: 10.1007/s00216-012-5947-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 02/17/2012] [Accepted: 03/12/2012] [Indexed: 10/28/2022]
|
15
|
Sanson N, Bouyer F, Destarac M, In M, Gérardin C. Hybrid polyion complex micelles formed from double hydrophilic block copolymers and multivalent metal ions: size control and nanostructure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3773-3782. [PMID: 22242909 DOI: 10.1021/la204562t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Hybrid polyion complex (HPIC) micelles are nanoaggregates obtained by complexation of multivalent metal ions by double hydrophilic block copolymers (DHBC). Solutions of DHBC such as the poly(acrylic acid)-block-poly(acrylamide) (PAA-b-PAM) or poly(acrylic acid)-block-poly(2-hydroxyethylacrylate) (PAA-b-PHEA), constituted of an ionizable complexing block and a neutral stabilizing block, were mixed with solutions of metal ions, which are either monoatomic ions or metal polycations, such as Al(3+), La(3+), or Al(13)(7+). The physicochemical properties of the HPIC micelles were investigated by small angle neutron scattering (SANS) and dynamic light scattering (DLS) as a function of the polymer block lengths and the nature of the cation. Mixtures of metal cations and asymmetric block copolymers with a complexing block smaller than the stabilizing block lead to the formation of stable colloidal HPIC micelles. The hydrodynamic radius of the HPIC micelles varies with the polymer molecular weight as M(0.6). In addition, the variation of R(h) of the HPIC micelle is stronger when the complexing block length is increased than when the neutral block length is increased. R(h) is highly sensitive to the polymer asymmetry degree (block weight ratio), and this is even more true when the polymer asymmetry degree goes down to values close to 3. SANS experiments reveal that HPIC micelles exhibit a well-defined core-corona nanostructure; the core is formed by the insoluble dense poly(acrylate)/metal cation complex, and the diffuse corona is constituted of swollen neutral polymer chains. The scattering curves were modeled by an analytical function of the form factor; the fitting parameters of the Pedersen's model provide information on the core size, the corona thickness, and the aggregation number of the micelles. For a given metal ion, the micelle core radius increases as the PAA block length. The radius of gyration of the micelle is very close to the value of the core radius, while it varies very weakly with the neutral block length. Nevertheless, the radius of gyration of the micelle is highly dependent on the asymmetry degree of the polymer: if the neutral block length increases in a large extent, the micelle radius of gyration decreases due to a decrease of the micelle aggregation number. The variation of the R(g)/R(h) ratio as a function of the polymer block lengths confirms the nanostructure associating a dense spherical core and a diffuse corona. Finally, the high stability of HPIC micelles with increasing concentration is the result of the nature of the coordination complex bonds in the micelle core.
Collapse
Affiliation(s)
- Nicolas Sanson
- Institut Charles Gerhardt, UMR 5253 CNRS/ENSCM/UM2/UM1, 8 Rue de L'Ecole Normale, 34296 Montpellier Cedex 5, France
| | | | | | | | | |
Collapse
|
16
|
Pereira RFP, Tapia MJ, Valente AJM, Burrows HD. Effect of metal ion hydration on the interaction between sodium carboxylates and aluminum(III) or chromium(III) ions in aqueous solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:168-177. [PMID: 22107111 DOI: 10.1021/la2034164] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The interaction between sodium octanoate, decanoate, and dodecanoate and aluminum(III) and chromium(III) has been studied in water at natural pH values, starting well below the surfactant critical micelle concentration, using electrical conductivity, turbidity, and potentiometric measurements. With decanoate or dodecanoate, maximum interaction occurs at 3:1 stoichiometry, corresponding to charge neutralization. Although the solutions become turbid with both metal ions, indicating phase separation, differences are observed and attributed to the fact that aluminum(III) is relatively labile to substitution and rapidly replaces its water ligands, whereas chromium(III) is substitution inert. This shows up in well-defined floc formation with Al(3+), whereas Cr(3+) suspensions do not precipitate, probably because that replacement of coordinated water by carboxylate ligands is impeded. This can be overcome by increasing temperature, and differences in the thermal behavior with Al(3+) and Cr(3+) are suggested to be due to increased involvement of substitution reactions in the latter case. The effect of octanoate on the trivalent metal ions is less clear, and with Cr(3+) interaction only occurs when the carboxylate is in excess. Hydrophobic interactions between alkyl chains play a major role in driving phase separation. At high surfactant concentrations, the solid phases do not dissolve, in contrast to what is observed with the corresponding alkylsulfates. This has implications for use of these systems in metal separation through froth flotation. The concentration of metal ions in supernatant solution has been determined for sodium dodecanoate and sodium dodecylsulfate with Al(3+) and Cr(3+) over the whole surfactant concentration range by inductively coupled plasma-mass spectrometry (ICP-MS). From this, association constants have been determined and are found to be larger for the carboxylate than the alkylsulfate, in agreement with the greater Lewis basicity of the -CO(2)(-) group.
Collapse
Affiliation(s)
- Rui F P Pereira
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | | | | | | |
Collapse
|
17
|
Warnant J, Reboul J, Aqil A, Cacciaguerra T, Jerome C, Gerardin C. Nanostructured silica templated by double hydrophilic block copolymers with a comb-like architecture. POWDER TECHNOL 2011. [DOI: 10.1016/j.powtec.2010.08.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
18
|
|
19
|
Guragain S, Bastakoti BP, Hasegawa M, Nakashima K. Complex micelle formation between poly(ethylene oxide-b-N-methyl-2-vinylpyridinium iodide) and poly(methacrylic acid) in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.04.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
20
|
pH-sensitive double-hydrophilic block copolymer micelles for biological applications. Int J Pharm 2009; 379:212-7. [DOI: 10.1016/j.ijpharm.2009.05.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2009] [Revised: 04/29/2009] [Accepted: 05/18/2009] [Indexed: 11/15/2022]
|
21
|
Kim JO, Nukolova NV, Oberoi HS, Kabanov AV, Bronich TK. Block Ionomer Complex Micelles with Cross-Linked Cores for Drug Delivery. POLYMER SCIENCE SERIES A 2009; 51:708-718. [PMID: 21127731 DOI: 10.1134/s0965545x09060169] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Soft polymeric nanomaterials were synthesized by template-assisted method involving condensation of the poly(ethylene oxide)-b-polycarboxylate anions by metal ions into core-shell block ionomer complex micelles followed by chemical cross-linking of the polyion chains in the micelle cores. The resulting materials represent nanogels and are capable of swelling in a pH-dependent manner. The structural determinants that guide the self-assembly of the initial micelle templates and the swelling behavior of the cross-linked micelles include the block ionomer structure, the chemical nature of metal ions, the structure of the cross-links and the degree of cross-linking. The application of these materials for loading and release of a drug, cisplatin, is evaluated. These cross-linked block ionomer micelles have promise for delivery of pharmaceutical agents.
Collapse
Affiliation(s)
- Jong Oh Kim
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, 985830 Nebraska Medical Center, Omaha, NE 68198-5830, USA
| | | | | | | | | |
Collapse
|
22
|
Voets IK, de Keizer A, Cohen Stuart MA. Complex coacervate core micelles. Adv Colloid Interface Sci 2009; 147-148:300-18. [PMID: 19038373 DOI: 10.1016/j.cis.2008.09.012] [Citation(s) in RCA: 310] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Revised: 09/15/2008] [Accepted: 09/29/2008] [Indexed: 10/21/2022]
Abstract
In this review we present an overview of the literature on the co-assembly of neutral-ionic block, graft, and random copolymers with oppositely charged species in aqueous solution. Oppositely charged species include synthetic (co)polymers of various architectures, biopolymers - such as proteins, enzymes and DNA - multivalent ions, metallic nanoparticles, low molecular weight surfactants, polyelectrolyte block copolymer micelles, metallo-supramolecular polymers, equilibrium polymers, etcetera. The resultant structures are termed complex coacervate core/polyion complex/block ionomer complex/interpolyelectrolyte complex micelles (or vesicles); i.e., in short C3Ms (or C3Vs) and PIC, BIC or IPEC micelles (and vesicles). Formation, structure, dynamics, properties, and function will be discussed. We focus on experimental work; theory and modelling will not be discussed. Recent developments in applications and micelles with heterogeneous coronas are emphasized.
Collapse
|
23
|
Reinhold F, Kolb U, Lieberwirth I, Gröhn F. Assemblies of double hydrophilic block copolymers and oppositely charged dendrimers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:1345-1351. [PMID: 19123807 DOI: 10.1021/la8027594] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The association of poly(ethylene oxide-b-methacrylic acid) and poly(amidoamine) dendrimers was examined by dynamic light scattering and small angle neutron scattering. With increasing amounts of the G4 dendrimer as the counterion, the size of the assemblies increases until it reaches a hydrodynamic radius of about 70 nm. The structure is consistent with poly(methyl methacrylate) (PMAA) chains closely aggregating with the dendrimers at low dendrimer amounts and volume-filling PMAA blocks at higher dendrimer contents. Similar behavior was observed for G4 and G2 dendrimers, while smaller G0 molecules showed an opposite dependence. The results represent an example of finite size assemblies formed by "electrostatic self-assembly" that are stable in aqueous solution and represent equilibrium structures, the structure and size of which can be tuned through the building units, loading ratio, and pH.
Collapse
Affiliation(s)
- Frank Reinhold
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | | | | | | |
Collapse
|
24
|
Boudier A, Aubert-Pouëssel A, Louis-Plence P, Gérardin C, Jorgensen C, Devoisselle JM, Bégu S. The control of dendritic cell maturation by pH-sensitive polyion complex micelles. Biomaterials 2009; 30:233-41. [DOI: 10.1016/j.biomaterials.2008.09.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2008] [Accepted: 09/10/2008] [Indexed: 10/21/2022]
|
25
|
Bronstein LM, Kostylev M, Shtykova E, Vlahu T, Huang X, Stein BD, Bykov A, Remmes NB, Baxter DV, Svergun DI. Mixed Co/Fe oxide nanoparticles in block copolymer micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:12618-12626. [PMID: 18828621 DOI: 10.1021/la8021276] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Small iron oxide and Co-doped iron oxide nanoparticles (NPs) were synthesized in a commercial amphiphilic block copolymer, poly(ethylene oxide)-b-poly(methacrylic acid) (PEO 68-b-PMAA8), in aqueous solutions. The structure and composition of the micelles containing guest molecules (metal salts) or NPs (metal oxides) were studied using transmission electron microscopy, dynamic light scattering, X-ray photoelectron spectroscopy, and X-ray powder diffraction. The enlarged micelle cores after incorporation of metal salts are believed to be formed by both PMAA blocks containing metal species and penetrating PEO chains. The nanoparticle size distributions in PEO 68-b-PMAA8 were determined using small-angle X-ray scattering (SAXS) in bulk. Two independent methods for SAXS data interpretation for comprehensive analysis of volume distributions of metal oxide NPs showed presence of both small particles and larger entities containing metal species which are ascribed to organization of block copolymer micelles in bulk. The magnetometry measurements revealed that the NPs are superparamagnetic and their characteristics depend on the method of the NP synthesis. The important advantage of the PEO 68-b-PMAA8 stabilized magnetic nanoparticles described in this paper is their remarkable solubility and stability in water and buffers.
Collapse
|
26
|
Sondjaja HR, Hatton TA, Tam KC. Self-assembly of poly(ethylene oxide)-block-poly(acrylic acid) induced by CaCl2: mechanistic study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:8501-8506. [PMID: 18646881 DOI: 10.1021/la800727e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The interaction between CaCl 2 and double hydrophilic block copolymer, poly(ethylene oxide) 45- block-poly(acrylic acid) 70, PEO 45- b-PAA 70, was investigated. At a stoichiometric ratio of Ca2+:COO (-) = 0.5, Ca2+ ions were bound to COO (-) groups on PAA segments via electrostatic interaction. Small particles of 4-8 nm in diameter were observed, suggesting the formation of coil-like polymeric globule induced by charge neutralization. At Ca2+:COO (-) >or= 2.5, monodispersed aggregates of average hydrodynamic diameter of 52.0 +/- 7.4 nm were produced. The ISE, ITC, surface tension and fluorescence spectroscopic data confirmed that the formation of these aggregates is not the result of interaction between excess Ca2+ ions and the polymer, but rather it is due to changes in the water activity that triggers the structural rearrangement of Ca2+/PEO 45- b-PAA 70 complex.
Collapse
Affiliation(s)
- H Ronny Sondjaja
- Singapore-MIT Alliance, National University of Singapore, Singapore, Singapore
| | | | | |
Collapse
|
27
|
Voets IK, van der Burgh S, Farago B, Fokkink R, Kovacevic D, Hellweg T, de Keizer A, Cohen Stuart MA. Electrostatically Driven Coassembly of a Diblock Copolymer and an Oppositely Charged Homopolymer in Aqueous Solutions. Macromolecules 2007. [DOI: 10.1021/ma071356z] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilja K. Voets
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Stefan van der Burgh
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Bela Farago
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Remco Fokkink
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Davor Kovacevic
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Thomas Hellweg
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Arie de Keizer
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| | - Martien A. Cohen Stuart
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands, Institut Max von Laue−Paul Langevin, F-38042 Grenoble Cedex 9, France, and Physikalische Chemie I, University of Bayreuth, 95440 Bayreuth, Germany
| |
Collapse
|
28
|
|
29
|
Friberg SE. Evaporation from an ionic liquid emulsion. J Colloid Interface Sci 2007; 307:494-9. [PMID: 17207810 DOI: 10.1016/j.jcis.2006.12.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2006] [Revised: 12/01/2006] [Accepted: 12/07/2006] [Indexed: 10/23/2022]
Abstract
The conditions during evaporation in a liquid crystal-in-ionic liquid microemulsion (LC/microEm) were estimated using the phase diagram of the system. The equations for selected tie lines were established and the coordinates calculated for the sites, at which the evaporation lines crossed the tie lines. These values combined with the coordinates for the phases connecting the tie lines were used to calculate the amounts and the composition of the fractions of the two phases present in the emulsion during the evaporation. One of the emulsion phases was a lamellar liquid crystal and high energy emulsification would lead to the liquid crystal being disrupted to form vesicles. Such a system tenders a unique opportunity to study the interaction between vesicles and normal micelles, which gradually change to inverse micelles over bi-continuous structures. The amount of vesicles in the liquid phase versus the fraction liquid crystal was calculated for two extreme cases of vesicle core size and shell thickness. The limit of evaporation while retaining the vesicle structure was calculated for emulsions of different original compositions assuming the minimum continuous liquid phase to be 50% of the emulsion.
Collapse
Affiliation(s)
- Stig E Friberg
- Chemistry Department, University of Virginia, 1695 Goldentree Place, Charlottesville, VA, USA.
| |
Collapse
|
30
|
Nakashima K, Bahadur P. Aggregation of water-soluble block copolymers in aqueous solutions: recent trends. Adv Colloid Interface Sci 2006; 123-126:75-96. [PMID: 16860770 DOI: 10.1016/j.cis.2006.05.016] [Citation(s) in RCA: 197] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This review summarizes recent literature and some of our own results on aggregation behavior on water-soluble block copolymers belonging to three different classes viz. hydrophilic-hydrophobic (AB, ABA and BAB) block copolymers, double hydrophilic block copolymers (DHBCs) and ABC triblock copolymers. In the case of amphiphilic copolymers, special attention has been focussed on aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers (Pluronics) and their aggregation in aqueous solutions at different temperatures as well as in the presence of various additives. Recent studies based on modern techniques viz. scattering (static and dynamic light scattering and small angle neutron scattering), spectral methods, e.g., fluorescence (static and time resolved), nuclear magnetic resonance and Fourier transform infrared spectroscopies, thermal methods e.g., differential scanning calorimetry and isothermal titration calorimetry, cryotransmission electron microscopy, ultrasonic absorption along with general physical properties like surface tension, viscosity and dye solubilization are summarized. For the DHBCs where one of the blocks is usually a polyion, complex formation by adding oppositely charged ions induces the formation of nanoaggregates. Characterization of such nanoaggregates of polyion complexes of DHBCs and their potential use for incorporation of ionic solutes in the micellar core are reviewed. The formation and characteristics of core-shell-corona micelles of ABC triblock copolymers and their applications as vehicles for controlled drug release are also discussed.
Collapse
Affiliation(s)
- Kenichi Nakashima
- Department of Chemistry, Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga 840-8502, Japan
| | | |
Collapse
|
31
|
Bontha S, Kabanov AV, Bronich TK. Polymer micelles with cross-linked ionic cores for delivery of anticancer drugs. J Control Release 2006; 114:163-74. [PMID: 16914223 DOI: 10.1016/j.jconrel.2006.06.015] [Citation(s) in RCA: 136] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2006] [Indexed: 10/24/2022]
Abstract
This work reports the design of polymer micelles with cross-linked ionic cores that display high stability. Block ionomer complexes of poly(ethylene oxide)-b-poly(methacrylic acid) copolymer and divalent metal cations were utilized as micellar templates for the synthesis of the cross-linked micelles. Such micelles represent hydrophilic nanospheres of core-shell morphology. The core comprises a network of the cross-linked polyanions, which is surrounded by the shell of hydrophilic PEO chains. The ionic character of the core provided for pH-dependent swelling/collapse behavior of the nanogels. Cisplatin, a potent chemotherapeutic agent, was incorporated into the ionic core of the micelles with remarkably high efficiency (22% w/w). The drug-loaded micelles were stable in aqueous dispersions exhibiting no aggregation or precipitation for a prolonged period of time. Slow release of platinum complexes was observed in sustained manner from the cisplatin-loaded cross-linked micelles in physiological saline. In vitro studies using human A2780 ovarian carcinoma cells demonstrated that the cross-linked micelles rapidly internalized and delivered cisplatin into cells. These results indicated that polymer micelles with cross-linked ionic cores are promising for further fundamental material studies and practical applications as drug delivery carriers.
Collapse
Affiliation(s)
- Satya Bontha
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, 985830 Nebraska Medical Center, Omaha, NE 68198-5830, USA
| | | | | |
Collapse
|
32
|
Wu K, Shi L, Zhang W, An Y, Zhang X, Li Z, Zhu XX. Thermoresponsiveness of hybrid micelles from poly(ethylene glycol)-block-poly(4-vinylpyridium) cations and SO4(2-) anions in aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:1474-7. [PMID: 16460064 DOI: 10.1021/la0527846] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The SO4(2-)-induced micellization of poly(ethylene glycol)-block-poly(4-vinylpyridium) (PEG110-b-P(4-VPH+)35) and the thermoresponsiveness of these hybrid micelles are studied by dynamic and static light scattering. When the concentration of H2SO4 is high enough, PEG110-b-P(4-VPH+)35 forms stable hybrid micelles with an ionic core of P(4-VPH+)35/SO4(2-) and a PEG corona at 25 degrees C. The formation of the hybrid micelles is reversible. A thermodynamic equilibrium exists between the hybrid micelles and PEG110-b-P(4-VPH+)35 unimers. The shifts of the equilibrium are mainly attributed to the variation of the electrostatic energy and entropic energy of the system. Therefore, the temperature can determine the states of the equilibrium, which means that the dissociation or the formation of the hybrid micelles can be triggered by just varying the temperature.
Collapse
Affiliation(s)
- Kai Wu
- Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China
| | | | | | | | | | | | | |
Collapse
|
33
|
Bouyer F, Sanson N, Destarac M, Gérardin C. Hydrophilic block copolymer-directed growth of lanthanum hydroxide nanoparticles. NEW J CHEM 2006. [DOI: 10.1039/b516368d] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Wu K, Shi L, Zhang W, An Y, Zhu XX. Adjustable temperature sensor with double thermoresponsiveness based on the aggregation property of binary diblock copolymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.24300] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
35
|
Wu K, Shi L, Zhang W, An Y, Zhu XX, Zhang X, Li Z. Formation of hybrid micelles between poly(ethylene glycol)-block-poly(4-vinylpyridinium) cations and sulfate anions in an aqueous milieu. SOFT MATTER 2005; 1:455-459. [PMID: 32646114 DOI: 10.1039/b512610j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The SO-induced micellization of poly(ethylene glycol)--poly(4-vinylpyridinium)(PEG-b-P(4-VPH)) in aqueous solution is studied by dynamic and static light scattering, and transmission electron microscopy. The SO anions can act as cross-linkers of the P(4-VPH) blocks through the electrostatic attraction between 4-VPH and SO to induce the micellization of PEG--P(4-VPH). The resultant hybrid micelles are spherical and consist of an ion-complex core of P(4-VPH)/SO and a water-soluble PEG corona and present a density gradient between the core and corona and the core has a higher density. The SO concentrations can affect the structure of the core-corona hybrid micelles. The low SO conentration leads to a loose core while the high SO concentration leads to a compact core.
Collapse
Affiliation(s)
- Kai Wu
- Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China. (Linqi Shi)
| | - Linqi Shi
- Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China. (Linqi Shi)
| | - Wangqing Zhang
- Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China. (Linqi Shi)
| | - Yingli An
- Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China. (Linqi Shi)
| | - Xiao-Xia Zhu
- Département de chimie, Université de Montréal, Pavillon Bombardier, C.P. 6128, succ. Centre-ville, Montreal, QC H3C 3J7, Canada. (Xiao-Xia Zhu)
| | - Xu Zhang
- Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China. (Linqi Shi)
| | - Zhanyong Li
- Institute of Polymer Chemistry, Nankai University, Tianjin, 300071, China. (Linqi Shi)
| |
Collapse
|
36
|
|