pH-responsive inorganic–organic hybrid supramolecular hydrogels with jellyfish-like switchable chromic luminescence

2014 ◽  
Vol 50 (66) ◽  
pp. 9333-9335 ◽  
Author(s):  
Haibing Wei ◽  
Nan Shi ◽  
Jinlong Zhang ◽  
Yan Guan ◽  
Jie Zhang ◽  
...  
Keyword(s):  
Triblock Copolymers ◽  
Sol Gel ◽  
Ph Responsive ◽  
Ph Change ◽  
Hybrid Hydrogel ◽  
Organic Hybrid ◽  
Sol Gel Transition ◽  
Gel Transition

A novel hybrid hydrogel, based on electrostatic co-assembly of polyoxometaltate and the ABA triblock copolymers shows both sol–gel transition and luminescence variation in response to pH change.

scholarly journals Dual responsive oligo(lysine)-modified Pluronic F127 hydrogels for drug release of 5-fluorouracil

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24507-24514
Author(s):  
Peihong Li ◽  
Xueyan Dai ◽  
Lijie Qu ◽  
Yanlong Sui ◽  
Chunling Zhang
Keyword(s):  
Drug Release ◽  
Sol Gel ◽  
Pluronic F127 ◽  
Ph Responsive ◽  
Temperature Responsive ◽  
Dual Responsive ◽  
Sol Gel Transition ◽  
Gel Transition

Oligo(lysine)-F127 hydrogels have a temperature-responsive sol–gel transition and pH-responsive micelle morphology.

Controlled Hierarchical Pore Structures in Ethylene-Bridged Polysilsesquioxane Gels

2003 ◽  
Vol 788 ◽  
Author(s):  
Yuki Kobayashi ◽  
Kazuki Nakanishi ◽  
Kazuyuki Hirao
Keyword(s):  
Phase Separation ◽  
Ethylene Glycol ◽  
Triblock Copolymers ◽  
Sol Gel ◽  
Poly Ethylene Glycol ◽  
Bridged Polysilsesquioxane ◽  
Sol Gel Transition ◽  
Poly Ethylene ◽  
Hierarchical Pore ◽  
Gel Transition

ABSTRACTFormation of hierarchical macropores and mesopores in ethylene-bridged polysilsesquioxane sol-gel systems via concurrent sol-gel transition and phase separation induced by the incorporation of supramolecular templats has been investigated. A series of poly(ethylene-glycol)-poly(propyleneglycol)- poly(ethyleneglycol) triblock copolymers, EOPOEOs, have been employed as supramolecular templates, while 1,2-bis(trimethoxysilyl)ethane was used as a polysilsesquioxane source. Successful combination of templated mesopores and well-defined macropores due to phase-separation has been found in the system with EOPOEOs having 70 PO units and respective 20 EO units. Although similar macroporous morphology has been obtained for all the EOPOEOs with EO chain longer or shorter than 20 units, the optimum composition for the co-continuous macropores and that for templated mesopores deviated from each other, resulting in the failure of producing hierarchical macropores and mesopores.

Environmentally benign pH-responsive cytidine-5′-monophosphate molecule-mediated akaganeite (5′-CMP-β-FeOOH) soft supramolecular hydrogels induced by the puckering of ribose sugar with efficient loading/release capabilities

2019 ◽  
Vol 43 (37) ◽  
pp. 14997-15013 ◽  
Author(s):  
Anil Kumar ◽  
Priyanka Priyanka
Keyword(s):  
Slow Release ◽  
Sol Gel ◽  
Environmentally Benign ◽  
Ph Responsive ◽  
Sol Gel Transition ◽  
Efficient Loading ◽  
Ribose Sugar ◽  
Gel Transition

A novel synthetic protocol for environmentally benign 5′-CMP-β-FeOOH soft hydrogels exhibiting a rapid pH-responsive reversible sol–gel transition, efficient adsorption and slow release capabilities is reported.

Ion-selective molecular inclusion of organic dyes into pH-responsive gel assemblies of zwitterionic surfactants

2019 ◽  
Vol 43 (22) ◽  
pp. 8465-8471
Author(s):  
Clara Morita-Imura ◽  
Yuka Sakurai ◽  
Anna Uchiumi ◽  
Hitoshi Shindo
Keyword(s):  
Organic Dyes ◽  
Sol Gel ◽  
Dye Molecules ◽  
Ph Responsive ◽  
Zwitterionic Surfactants ◽  
Molecular Inclusion ◽  
Capture And Release ◽  
Sol Gel Transition ◽  
Gel Transition

The pH-Responsive sol–gel transition of a surfactant gel took place along with ion-selective capture and release of dye molecules.

Synthesis and Properties of Amphipathic Poly(D,L-lactide-co-glycolide)-polyethylene glycol-poly(D,L-lactide-co-glycolide) Triblock Copolymers

2015 ◽  
Vol 68 (10) ◽  
pp. 1593 ◽  
Author(s):  
Wenyao Zhen ◽  
Yannan Zhu ◽  
Weiping Wang ◽  
Zhaosheng Hou
Keyword(s):  
Polyethylene Glycol ◽  
Transition Temperature ◽  
Drug Release ◽  
Triblock Copolymers ◽  
Sol Gel ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Mass Ratio ◽  
Sol Gel Transition ◽  
Gel Transition

In this paper, amphipathic poly(d,l-lactide-co-glycolide)-polyethylene glycol-poly(d,l-lactide-co-glycolide) (PLGA-PEG-PLGA) triblock copolymers were synthesized via bulk ring-opening polymerization with d,l-lactide (d,l-LA), glycolide (GA), and polyethylene glycol (PEG) as raw materials and tin(ii) bis(2-ethylhexanoate) (Sn(Oct)2) as catalyst. The synthesis and purification processes were free from organic solvent. The chemical structure of PLGA-PEG-PLGA was characterized by Fourier transform infrared spectroscopy, 1H NMR, gel permeation chromatography, differential scanning calorimetry, and thermo gravimetric analysis. The thermo-sensitivity of PLGA-PEG-PLGA aqueous solution was examined, and the results showed that the copolymers concentration, mass ratio of d,l-LA/GA, and molecular weight of PEG played important parts in controlling the sol–gel transition temperature. The sol–gel transition occurred at lower temperatures with higher copolymer concentrations and mass ratios of d,l-LA/GA. In contrast, the sol–gel transition temperature increased with higher molecular weights of PEG. In vitro drug release studies were carried out using ceftibuten as a model drug. The results indicated that PLGA-PEG-PLGA prepared with 30 wt-% PEG1500 and 70 wt-% PLGA (mass ratio of d,l-LA/GA = 2 : 1) was an effective system for achieving long-sustained controlled release. The drug release from the hydrogel showed a higher initial release followed by a slower pattern up to 120 h, and the mean retention time was ~50 h.

Redox- and pH-Responsive Cysteamine-Modified Poly(aspartic acid) Showing a Reversible Sol-Gel Transition

2013 ◽  
Vol 13 (5) ◽  
pp. 633-640 ◽  
Author(s):  
Benjámin Gyarmati ◽  
Balázs Vajna ◽  
Árpád Némethy ◽  
Krisztina László ◽  
András Szilágyi
Keyword(s):  
Aspartic Acid ◽  
Sol Gel ◽  
Ph Responsive ◽  
Sol Gel Transition ◽  
Gel Transition

Ambidextrous Gel Property and pH-Responsive Sol–Gel Transition of Low Molecular Mass Gelator Based on a Long-chain Amide Derivative

2009 ◽  
Vol 38 (8) ◽  
pp. 778-779 ◽  
Author(s):  
Yoshiro Imura ◽  
Keisuke Matsue ◽  
Hiroki Sugimoto ◽  
Reizo Ito ◽  
Takeshi Kondo ◽  
...  
Keyword(s):  
Molecular Mass ◽  
Sol Gel ◽  
Ph Responsive ◽  
Amide Derivative ◽  
Sol Gel Transition ◽  
Long Chain ◽  
Gel Transition
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