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Rangel Euzcateguy G, Parajua‐Sejil C, Marchal P, Chapron D, Averlant‐Petit M, Stefan L, Pickaert G, Durand A. Rheological investigation of supramolecular physical gels in water/dimethylsulfoxide mixtures by lysine derivatives. POLYM INT 2021. [DOI: 10.1002/pi.6179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
| | | | | | - David Chapron
- Université de Lorraine, CentraleSupélec, LMOPS Metz France
| | | | - Loïc Stefan
- Université de Lorraine, CNRS, LCPM Nancy France
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Mousaviasl S, Saleh T, Shojaosadati SA, Boddohi S. Synthesis and characterization of schizophyllan nanogels via inverse emulsion using biobased materials. Int J Biol Macromol 2018; 120:468-474. [DOI: 10.1016/j.ijbiomac.2018.08.119] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/07/2018] [Accepted: 08/24/2018] [Indexed: 01/15/2023]
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Physical gelation of supramolecular hydrogels cross-linked by metal-ligand interactions: Dynamic light scattering and microrheological studies. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.077] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Huang G, Zhang H, Liu Y, Chang H, Zhang H, Song H, Xu D, Shi T. Strain Hardening Behavior of Poly(vinyl alcohol)/Borate Hydrogels. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02393] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Gang Huang
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Graduate School
of the Chinese Academy of Sciences, Beijing 100039, China
| | - Huanhuan Zhang
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Graduate School
of the Chinese Academy of Sciences, Beijing 100039, China
| | - Yulin Liu
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- College
of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Haijian Chang
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- College
of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Hongwei Zhang
- Department
of Food Science, Rutgers, The State University of New Jersey, 65 Dudley
Road, New Brunswick, New
Jersey 08901, United States
| | - Hongzan Song
- College
of Chemistry and Environmental Science, Hebei University, Baoding 071002, China
| | - Donghua Xu
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Tongfei Shi
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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Cheng R, Ou S, Bu Y, Li X, Liu X, Wang Y, Guo R, Shi B, Jin D, Liu Y. Starch–borate–graphene oxide nanocomposites as highly efficient targeted antitumor drugs. RSC Adv 2015. [DOI: 10.1039/c5ra17622k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Novel antitumor drugs, compatible with normal cells but highly toxic against cancer cells, were prepared from starch–borate–graphene oxide (SBG) nanocomposites.
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High-water-content mouldable polyvinyl alcohol-borax hydrogels reinforced by well-dispersed cellulose nanoparticles: dynamic rheological properties and hydrogel formation mechanism. Carbohydr Polym 2013; 102:306-16. [PMID: 24507286 DOI: 10.1016/j.carbpol.2013.11.045] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/19/2013] [Accepted: 11/27/2013] [Indexed: 11/21/2022]
Abstract
Cellulose nanoparticle (CNP) reinforced polyvinyl alcohol-borax (PB) hydrogels were produced via a facile approach in an aqueous system. The effects of particle size, aspect ratio, crystal structure, and surface charge of CNPs on the rheological properties of the composite hydrogels were investigated. The rheological measurements confirmed the incorporation of well-dispersed CNPs to PB system significantly enhanced the viscoelasticity and stiffness of hydrogels. The obtained free-standing, high elasticity and mouldable hydrogels exhibited self-recovery under continuous step strain and thermo-reversibility under temperature sweep. With the addition of cellulose I nanofibers, a 19-fold increase in the high-frequency plateau of storage modulus was obtained compared with that of the pure PB. CNPs acted as multifunctional crosslinking agents and nanofillers to physically and chemically bridge the 3D network hydrogel. The plausible mechanism for the multi-complexation between CNPs, polyvinyl alcohol and borax was proposed to understand the relationship between the 3D network and hydrogel properties.
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Schizophyllan: A review on its structure, properties, bioactivities and recent developments. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bcdf.2013.01.002] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Travelet C, Schlatter G, Hébraud P, Brochon C, Anokhin DV, Ivanov DA, Hadziioannou G. Physical Gels Based on Polyrotaxanes: Kinetics of the Gelation, and Relative Contributions of α-Cyclodextrin and Poly(ethylene oxide) to the Gel Cohesion. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201050524] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Travelet C, Schlatter G, Hébraud P, Brochon C, Lapp A, Hadziioannou G. Formation and self-organization kinetics of alpha-CD/PEO-based pseudo-polyrotaxanes in water. A specific behavior at 30 degrees C. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:8723-8734. [PMID: 19301842 DOI: 10.1021/la900070v] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
alpha-Cyclodextrins (alpha-CDs) have the ability to form inclusion complexes with poly(ethylene oxide) (PEO) polymer chains. These pseudo-polyrotaxanes (PPRs) can be obtained by quenching an alpha-CD/PEO mixture in water from 70 degrees C down to a lower temperature (typically in the range from 5 to 30 degrees C) thanks to favorable interactions between alpha-CD cavities and PEO chains. Moreover, starting from a liquid alpha-CD/PEO mixture at a total mass fraction of 15% w/w at 70 degrees C, the formation of PPRs with time at a lower temperature induces a white physical gel with time, and phase separation is observed. We established that PPR molecules are exclusively found in the precipitated phase although unthreaded alpha-CD molecules and unthreaded PEO chains are in the liquid phase. At 30 degrees C, the physical gel formation is much slower than at 5 degrees C. At 30 degrees C, we established that, in a first step, alpha-CDs thread onto PEO chains, forming PPR molecules which are not in good solvent conditions in water. At a higher length scale, rapid aggregation of the PPR molecules occurs, and threaded alpha-CD-based nanocylinders form (cylinder length L = 5.7 nm and cylinder radius R = 4.7 nm). At a higher length scale, alpha-CD-based nanocylinders associate in a Gaussian way, engendering the formation of precipitated domains which are responsible for the high turbidity of the studied system. At the end of this first step (i.e., after 20 min), the system still remains liquid and the PPRs are totally formed. Then, in a second step (i.e., after 150 min), the system undergoes its reorganization characterized by a compacity increase of the precipitated domains and forms a physical gel. We found that PPRs are totally formed after 20 min at 30 degrees C and that the system stays in a nongel state up to 150 min. This opens new perspectives regarding the PPR chemical modification: between these two characteristic times, we can easily envisage an efficient chemical modification of the PPR molecules in water, as for instance an end-capping reaction leading to the synthesis of polyrotaxanes.
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Affiliation(s)
- Christophe Travelet
- Laboratoire d'Ingénierie des Polymères pour les Hautes Technologies, Ecole Européenne de Chimie, Polymères et Matériaux, Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg cedex 2, France,
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Ozbas B, Rajagopal K, Haines-Butterick L, Schneider JP, Pochan DJ. Reversible stiffening transition in beta-hairpin hydrogels induced by ion complexation. J Phys Chem B 2007; 111:13901-8. [PMID: 18044866 DOI: 10.1021/jp075117p] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have previously shown that properly designed lysine and valine-rich peptides undergo a random coil to beta-hairpin transition followed by intermolecular self-assembly into a fibrillar hydrogel network only after the peptide solutions are heated above the intramolecular folding transition temperature. Here we report that these hydrogels also undergo a stiffening transition as they are cooled below a critical temperature only when boric acid is used to buffer the peptide solution. This stiffening transition is characterized by rheology, dynamic light scattering, and small angle neutron scattering. Rheological measurements show that the stiffening transition causes an increase in the hydrogel storage modulus (G') by as much as 1 order of magnitude and is completely reversible on subsequently raising the temperature. Although this reversible transition exhibits rheological properties that are similar to polyol/borax solutions, the underlying mechanism does not involve hydroxyl-borate complexation. The stiffening transition is mainly caused by the interactions between lysine and boric acid/borate anion and is not driven by the changes in the secondary structure of the beta-hairpin peptide. Addition of glucose to boric acid and peptide solution disrupts the stiffening transition due to competitive glucose-borate complexation.
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Affiliation(s)
- Bulent Ozbas
- Department of Materials Science and Engineering, Delaware Biotechnology Institute, Newark, Delaware 19716, USA
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Abstract
A transparent cellulose solution was prepared by mixing 7 wt % NaOH with 12 wt % urea aqueous solution which was precooled to below -10 degrees C and which was able to rapidly dissolve cellulose at ambient temperature. The rheological properties and behavior of the gel-formed cellulose solution were investigated by using dynamic viscoelastic measurement. The effects of temperature, time, cellulose molecular weight, and concentrations on both the shear storage modulus (G') and the loss modulus (G") were analyzed. The cellulose solution having a viscosity-average molecular weight (M(eta)) of 11.4 x 10(4) had its sol-gel transition temperature decreased from 60.3 to 30.5 degrees C with an increase of its concentration from 3 to 5 wt %. The gelation temperature of a 4 wt % cellulose solution dropped from 59.4 to 30.5 degrees C as the M(eta) value was increased from 4.5 x 10(4) to 11.4 x 10(4). Interestingly, at either higher temperature (above 30 degrees C), or lower temperature (below -3 degrees C), or for longer gelation time, gels could form in the cellulose solutions. However, the cellulose solution remains a liquid state for a long time at the temperature range from 0 to 5 degrees C. For the first time, we revealed an irreversible gelation in the cellulose solution system. The gel having been formed did not dissolve even when cooled to the temperature of -10 degrees C, at which it was dissolved previously. Therefore, this indicates that either heating or cooling treatment could not break such stable gels. A high apparent activation energy (E(a)) of the cellulose solution below 0 degrees C was obtained and was used to explain the gel formation under the cooling process.
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Affiliation(s)
- Jie Cai
- Department of Chemistry, and Center of Nanoscience and Nanotechnology, Wuhan University, Wuhan 430072, China
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Fang Y, Takahashi R, Nishinari K. Protein/Polysaccharide Cogel Formation Based on Gelatin and Chemically Modified Schizophyllan. Biomacromolecules 2005; 6:3202-8. [PMID: 16283747 DOI: 10.1021/bm0505383] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the work, aldehyde groups were quantitatively introduced into schizophyllan (SPG) side chains through periodate oxidation. The periodate-oxidized SPG (POSPG) forms an elastic gel with gelatin. The cogel formation is based on the Schiff-base reaction between the amino groups of gelatin chains and the aldehyde groups of POSPG chains. The POSPG/gelatin cogel has an elastomeric character with a very small value of loss tangent. The gelation kinetics and gel properties were discussed as a function of POSPG concentration, gelatin concentration, oxidation degree, temperature, and pH. This method can be used to design a large variety of cogels between SPG and proteins.
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Affiliation(s)
- Yapeng Fang
- Department of Food and Human Health Sciences, Graduate School of Human Life Science, Osaka City University, Sumiyoshi, Osaka, 558-8585, Japan
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Nitta Y, Fang Y, Takemasa M, Nishinari K. Gelation of Xyloglucan by Addition of Epigallocatechin Gallate as Studied by Rheology and Differential Scanning Calorimetry. Biomacromolecules 2004; 5:1206-13. [PMID: 15244432 DOI: 10.1021/bm034526y] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interaction of tamarind seed xyloglucan (TSX) and epigallocatechin gallate (EGCG) was investigated. TSX alone showed the rheological behaviors of dilute and semidilute solution types in the temperature range from 10 to 50 degrees C and the concentration range from 1 to 10%. Addition of a small amount of EGCG changed the rheological properties of TSX solutions to induce a thermoreversible gelation. The sol-gel transition was detected as a crossover of the storage and loss shear moduli at a certain temperature in thermal scanning rheological measurements and an endo- and exo- thermic peaks in curves obtained by differential scanning calorimetry on heating and cooling. High storage modulus of the gels at all experimental frequencies also indicated the formation of a network structure. Increase in the gel strength and the enthalpy of the transition with increasing EGCG concentration at fixed TSX concentration suggested that EGCG was directly involved in the network formation through association with TSX. The TSX gel was obtained by addition of appropriate amount of EGCG. Addition of an excessive amount of EGCG induced precipitation.
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Affiliation(s)
- Y Nitta
- Graduate School of Human Life Science, Osaka City University, 3-3-138, Sumiyoshi-ku, Sugimoto, Osaka City, Osaka, 558-8585, Japan
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