Advances in versatile anti-swelling polymer hydrogels

2021 ◽  
pp. 112208
Author(s):  
Yiwei Zhan ◽  
Wenjiao Fu ◽  
Yacheng Xing ◽  
Xiaomei Ma ◽  
Chunying Chen
Keyword(s):  
Polymer Hydrogels

Design and fabrication of conductive polymer hydrogels and their applications in flexible supercapacitors

2020 ◽  
Vol 8 (44) ◽  
pp. 23059-23095 ◽  
Author(s):  
Xinting Han ◽  
Guangchun Xiao ◽  
Yuchen Wang ◽  
Xiaona Chen ◽  
Gaigai Duan ◽  
...  
Keyword(s):  
Conductive Polymer ◽  
Polymer Hydrogels ◽  
Conductive Materials ◽  
Flexible Supercapacitors

Conductive polymer hydrogels, which combine the advantages of both polymers and conductive materials, have huge potential in flexible supercapacitors.

scholarly journals Novel Self-Healing Metallocopolymers with Pendent 4-Phenyl-2,2′:6′,2″-terpyridine Ligand: Kinetic Studies and Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1760
Author(s):  
Rose K. Baimuratova ◽  
Gulzhian I. Dzhardimalieva ◽  
Evgeniy V. Vaganov ◽  
Valentina A. Lesnichaya ◽  
Gulsara D. Kugabaeva ◽  
...  
Keyword(s):  
Critical Role ◽  
Specific Effect ◽  
Kinetic Studies ◽  
Radical Copolymerization ◽  
Self Healing ◽  
Free Radical Copolymerization ◽  
Polymer Hydrogels ◽  
Close Proximity ◽  
Metal Group ◽  
Metal Polymer

We report here our successful attempt to obtain self-healing supramolecular hydrogels with new metal-containing monomers (MCMs) with pendent 4-phenyl-2,2′:6′,2″-terpyridine metal complexes as reversible moieties by free radical copolymerization of MCMs with vinyl monomers, such as acrylic acid and acrylamide. The resulting metal-polymer hydrogels demonstrate a developed system of hydrogen, coordination and electron-complementary π–π stacking interactions, which play a critical role in achieving self-healing. Kinetic data show that the addition of a third metal-containing comonomer to the system decreases the initial polymerization rate, which is due to the specific effect of the metal group located in close proximity of the active center on the growth of radicals.

Dynamic coordination of metal-alanine to control the multistimuli-responsiveness of self-powered polymer hydrogels

2021 ◽  
Author(s):  
Huan Chen ◽  
Jintao Jiang ◽  
Zhe Chen ◽  
Binjie Du ◽  
Chenghao Dai ◽  
...  
Keyword(s):  
Next Generation ◽  
Electrical Signals ◽  
Polymer Hydrogels ◽  
Dynamic Coordination ◽  
Smart Sensing ◽  
Self Powered

New self-powered hydrogels that reversibly change electrical signals in response to circumambient multistimuli are of interest for the development of the next-generation smart sensing devices. In this work, a new...

scholarly journals Silver Nanoparticles from Oregano Leaves’ Extracts as Antimicrobial Components for Non-Infected Hydrogel Contact Lenses

2021 ◽  
Vol 22 (7) ◽  
pp. 3539
Author(s):  
Anastasia Meretoudi ◽  
Christina N. Banti ◽  
Panagiotis K. Raptis ◽  
Christina Papachristodoulou ◽  
Nikolaos Kourkoumelis ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Contact Lenses ◽  
Attenuated Total Reflection ◽  
Bacterial Strains ◽  
Scanning Calorimetry ◽  
X Ray ◽  
E Coli ◽  
Polymer Hydrogels ◽  
20 Nm ◽  
And Staphylococcus Aureus

The oregano leaves’ extract (ORLE) was used for the formation of silver nanoparticles (AgNPs(ORLE)). ORLE and AgNPs(ORLE) (2 mg/mL) were dispersed in polymer hydrogels to give the pHEMA@ORLE_2 and pHEMA@AgNPs(ORLE)_2 using hydroxyethyl–methacrylate (HEMA). The materials were characterized by X-ray fluorescence (XRF) spectroscopy, X-ray powder diffraction analysis (XRPD), thermogravimetric differential thermal analysis (TG-DTA), derivative thermogravimetry/differential scanning calorimetry (DTG/DSC), ultraviolet (UV-Vis), and attenuated total reflection mode (ATR-FTIR) spectroscopies in solid state and UV–Vis in solution. The crystallite size value, analyzed with XRPD, was determined at 20 nm. The antimicrobial activity of the materials was investigated against Gram-negative bacterial strains Pseudomonas aeruginosa (P. aeruginosa) and Escherichia coli (E. coli). The Gram-positive ones of the genus of Staphylococcus epidermidis (S. epidermidis) and Staphylococcus aureus (S. aureus) are known to be involved in microbial keratitis by the means of inhibitory zone (IZ), minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC). The IZs, which developed upon incubation of P. aeruginosa, E. coli, S. epidermidis, and S. aureus with paper discs soaked in 2 mg/mL of AgNPs(ORLE), were 11.7 ± 0.7, 13.5 ± 1.9, 12.7 ± 1.7, and 14.3 ± 1.7 mm. When the same dose of ORLE was administrated, the IZs were 10.2 ± 0.7, 9.2 ± 0.5, 9.0 ± 0.0, and 9.0 ± 0.0 mm. The percent of bacterial viability when they were incubated over the polymeric hydrogel discs of pHEMA@AgNPs(ORLE)_2 was interestingly low (66.5, 88.3, 77.7, and 59.6%, respectively, against of P. aeruginosa, E. coli, S. epidermidis, and S. aureus) and those of pHEMA@ORLE_2 were 89.3, 88.1, 92.8, and 84.6%, respectively. Consequently, pHEMA@AgNPs(ORLE)_2 could be an efficient candidate toward the development of non-infectious contact lenses.

Design of Temperature Sensitive Imprinted Polymer Hydrogels Based on Multiple-Point Hydrogen Bonding

2004 ◽  
Vol 4 (7) ◽  
pp. 680-684 ◽  
Author(s):  
Xue-Yong Liu ◽  
Ying Guan ◽  
Xiao-Bin Ding ◽  
Yu-Xing Peng ◽  
Xin-Ping Long ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Multiple Point ◽  
Temperature Sensitive ◽  
Imprinted Polymer ◽  
Polymer Hydrogels

Polymer Hydrogels: A Review

2011 ◽  
Vol 50 (14) ◽  
pp. 1475-1486 ◽  
Author(s):  
Waham Ashaier Laftah ◽  
Shahrir Hashim ◽  
Akos N. Ibrahim
Keyword(s):  
Polymer Hydrogels

Injectable Natural Polymer Hydrogels for Treatment of Knee Osteoarthritis

2021 ◽  
pp. 2101479
Author(s):  
Xiaojie Lin ◽  
Ching Ting Tsao ◽  
Masayuki Kyomoto ◽  
Miqin Zhang
Keyword(s):  
Knee Osteoarthritis ◽  
Natural Polymer ◽  
Polymer Hydrogels
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