scholarly journals PVA/Agar Interpenetrating Network Hydrogel with Fast Healing, High Strength, Antifreeze, and Water Retention

2020 ◽  
Vol 221 (22) ◽  
pp. 2070049
Author(s):  
Xin Han ◽  
Mengyu Li ◽  
Zewen Fan ◽  
Yu Zhang ◽  
Huihui Zhang ◽  
...  
Keyword(s):  
Water Retention ◽  
High Strength ◽  
Interpenetrating Network ◽  
Fast Healing

PVA/Agar Interpenetrating Network Hydrogel with Fast Healing, High Strength, Antifreeze, and Water Retention

2020 ◽  
Vol 221 (22) ◽  
pp. 2000237
Author(s):  
Xin Han ◽  
Mengyu Li ◽  
Zewen Fan ◽  
Yu Zhang ◽  
Huihui Zhang ◽  
...  
Keyword(s):  
Water Retention ◽  
High Strength ◽  
Interpenetrating Network ◽  
Fast Healing

scholarly journals Preparation and Swelling Behaviors of High-Strength Hemicellulose-g-Polydopamine Composite Hydrogels

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 186
Author(s):  
Jiayan Ge ◽  
Kaiqi Gu ◽  
Kewen Sun ◽  
Xinyue Wang ◽  
Shuangquan Yao ◽  
...  
Keyword(s):  
Water Retention ◽  
High Strength ◽  
Release Behavior ◽  
Ph Responsive ◽  
Composite Hydrogels ◽  
Hydrogel Network ◽  
Microsphere Size ◽  
Chemical Cross Linking ◽  
Swelling Behaviors ◽  
Good Water Retention

Hemicellulose-based composite hydrogels were successfully prepared by adding polydopamine (PDA) microspheres as reinforcing agents. The effects of PDA microsphere size, dosage, and nitrogen content in hydrogel on the mechanical and rheological properties was studied. The compressive strength of hydrogel was increased from 0.11 to 0.30 MPa. The storage modulus G’ was increased from 7.9 to 22.0 KPa. The gaps in the hemicellulose network are filled with PDA microspheres. There is also chemical cross-linking between them. These gaps increased the density of the hydrogel network structure. It also has good water retention and pH sensitivity. The maximum cumulative release rate of methylene blue was 62.82%. The results showed that the release behavior of hydrogel was pH-responsive, which was beneficial to realizing targeted and controlling drug release.

In situ polymerization approach to cellulose–polyacrylamide interpenetrating network hydrogel with high strength and pH-responsive properties

Cellulose ◽  
2018 ◽  
Vol 26 (3) ◽  
pp. 1825-1839 ◽  
Author(s):  
Fengcai Lin ◽  
Xiangchao Lu ◽  
Zi Wang ◽  
Qilin Lu ◽  
Guanfeng Lin ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
High Strength ◽  
Ph Responsive ◽  
Interpenetrating Network

scholarly journals Multifunctional Semi-interpenetrating Superabsorbents from Graft Polymerization of Acrylic Acid on Cellulose in Presence of Fulvic Acid as Potential Slow Release Devices of Soil Nutrients

2016 ◽  
Vol 12 (2) ◽  
pp. 4045-4056 ◽  
Author(s):  
Hisham Essawy
Keyword(s):  
Acrylic Acid ◽  
Soil Nutrients ◽  
Network Structure ◽  
Water Retention ◽  
Graft Polymerization ◽  
Morphological Alteration ◽  
Interpenetrating Network ◽  
Swelling Potential ◽  
Additional Advantage ◽  
Release Devices

Grafting polymerization of acrylic acid (AA) was undertaken onto cellulose powder (Cell) in presence of potassium fulvate (KF) to produce semi-interpenetrating network structures. The grafting efficiency (GE) and grafting yield (GY) were studied as and indicated that the grafting process was not influenced in presence of KF. KF was expected to be incorporated into the cellulose backbone in the same course of the graft polymerization via polycondensation with groups from cellulose and monomer. The simultaneous graft polymerization of acrylic acid and polycondensation processes of all components allows formation of a more chemically active semi-interpenetrating network structure. Successful incorporation of KF to the network structure was predicted from fourier transform infrared spectroscopy (FTIR) while enhanced Cu2+ uptake confirmed the better chemical activity with respect to the same network prepared in absence of KF. Furthermore, the wide variation of the swelling potential as a function of the pH further corroborates the insertion of KF to the network structure. Imaging with scanning electron microscopy (SEM) indicated morphological alteration on the surface which might be related to the KF anchoring to the cellulose backbone. The developed superabsorbents showed increment in the water absorption both in distilled water and salted solutions as well. The newly developed superabsorbent was applied as a support for soil nutrients and their controlled release in soil was studied. The results proved efficiency of the superabsorbent to warrant appropriate release of the nutrients according to the time regulations set by European Committee of Normalization (ECN). Improved water retention was also an additional advantage.

scholarly journals Multifunctional Semi-interpenetrating Superabsorbents from Graft Polymerization of Acrylic Acid on Cellulose in Presence of Fulvic Acid as Potential Slow Release Devices of Soil Nutrients

2016 ◽  
Vol 12 (9) ◽  
pp. 4045-4056
Author(s):  
Hisham Essawy
Keyword(s):  
Acrylic Acid ◽  
Soil Nutrients ◽  
Network Structure ◽  
Water Retention ◽  
Graft Polymerization ◽  
Morphological Alteration ◽  
Interpenetrating Network ◽  
Swelling Potential ◽  
Additional Advantage ◽  
Release Devices

Grafting polymerization of acrylic acid (AA) was undertaken onto cellulose powder (Cell) in presence of potassium fulvate (KF) to produce semi-interpenetrating network structures. The grafting efficiency (GE) and grafting yield (GY) were studied as and indicated that the grafting process was not influenced in presence of KF. KF was expected to be incorporated into the cellulose backbone in the same course of the graft polymerization via polycondensation with groups from cellulose and monomer. The simultaneous graft polymerization of acrylic acid and polycondensation processes of all components allows formation of a more chemically active semi-interpenetrating network structure. Successful incorporation of KF to the network structure was predicted from fourier transform infrared spectroscopy (FTIR) while enhanced Cu2+ uptake confirmed the better chemical activity with respect to the same network prepared in absence of KF. Furthermore, the wide variation of the swelling potential as a function of the pH further corroborates the insertion of KF to the network structure. Imaging with scanning electron microscopy (SEM) indicated morphological alteration on the surface which might be related to the KF anchoring to the cellulose backbone. The developed superabsorbents showed increment in the water absorption both in distilled water and salted solutions as well. The newly developed superabsorbent was applied as a support for soil nutrients and their controlled release in soil was studied. The results proved efficiency of the superabsorbent to warrant appropriate release of the nutrients according to the time regulations set by European Committee of Normalization (ECN). Improved water retention was also an additional advantage.

Synthesis and Characterization of Sodium AMPS-Based Interpenetrating Network Hydrogels for Use as Temporary Wound Dressing

2014 ◽  
Vol 894 ◽  
pp. 300-304 ◽  
Author(s):  
Juraiporn Porkaew ◽  
Runglawan Somsunan ◽  
Kanarat Nalampang ◽  
Robert Molloy
Keyword(s):  
Sulfonic Acid ◽  
Wound Dressing ◽  
Water Retention ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Poly Vinyl Alcohol ◽  
Interpenetrating Network ◽  
Free Radical Copolymerization ◽  
Water Interaction

Hydrogel is one of the most interesting materials for use as wound dressing. In this study, interpenetrating network (IPN) hydrogels were synthesized by free radical copolymerization of sodium salt of 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and N-vinylpyrrolidone (NVP), in the presence of poly (vinyl alcohol) (PVOH). The incorporation of PVOH offered the hydrophilicity to the hydrogel. The polymerization was carried out using N,N-methylene-bis-acrylamide and 4,4-azo-bis (4-cyanopentanoic acid) as a crosslinker and UV-photoinitiator, respectively. The successful of polymerization was indicated by gel content which was in the range of 86 90%. The structure of prepared hydrogels was confirmed by Fourier Transform Infrared Spectroscopy. In addition, the hydrogel-water interaction was investigated by mean of water content and water retention. Manipulation of the AMPS/NVP ratio significantly altered the properties of the hydrogels. As expected, the interaction of hydrogel and water decreased as increasing of NVP contents due to this monomer provides more hydrophobic functional groups. In conclusion, it is believed that the prepared AMPS/NVP/PVOH interpenetrating network hydrogels show the potential for use as temporary wound dressing.

scholarly journals An organic hydrogel with high-strength, high-water retention properties for pressure sore protection

2021 ◽  
Author(s):  
Li Zhang ◽  
Miaomiao He ◽  
Lingdong Chen ◽  
Pinghua Xu ◽  
Jiaohui Bao ◽  
...  
Keyword(s):  
Water Retention ◽  
High Strength ◽  
High Water ◽  
Pressure Sore ◽  
Water Retention Properties

Fabrication of a high-strength hydrogel with an interpenetrating network structure

2009 ◽  
Vol 346 (1-3) ◽  
pp. 91-98 ◽  
Author(s):  
Qunwei Tang ◽  
Xiaoming Sun ◽  
Qinghua Li ◽  
Jihuai Wu ◽  
Jianming Lin
Keyword(s):  
Network Structure ◽  
High Strength ◽  
Interpenetrating Network
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