scholarly journals Self-Healing Behavior of Polymer/Protein Hybrid Hydrogels

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 130
Author(s):  
Maria Bercea
Keyword(s):  
Bovine Serum Albumin ◽  
Network Structure ◽  
Viscoelastic Properties ◽  
Reduced Glutathione ◽  
Viscoelastic Behavior ◽  
The Self ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Porous Network ◽  
Hybrid Hydrogels

The paper presents the viscoelastic properties of new hybrid hydrogels containing poly(vinyl alcohol) (PVA), hydroxypropylcellulose (HPC), bovine serum albumin (BSA) and reduced glutathione (GSH). After heating the mixture at 55 °C, in the presence of GSH, a weak network is formed due to partial BSA unfolding. By applying three successive freezing/thawing cycles, a stable porous network structure with elastic properties is designed, as evidenced by SEM and rheology. The hydrogels exhibit self-healing properties when the samples are cut into two pieces; the intermolecular interactions are reestablished in time and therefore the fragments repair themselves. The effects of the BSA content, loaded deformation and temperature on the self-healing ability of hydrogels are presented and discussed through rheological data. Due to their versatile viscoelastic behavior, the properties of PVA/HPC/BSA hydrogels can be tuned during their preparation in order to achieve suitable biomaterials for targeted applications.

scholarly journals A Self-healing Hydrogel Electrolyte Towards All-in-one Flexible Supercapacitors

2021 ◽  
Author(s):  
Wen-Bin Ma ◽  
Ke-Hu Zhu ◽  
Shi-Fang Ye ◽  
Yao Wang ◽  
Lin Guo ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Mechanical Performance ◽  
In Situ Polymerization ◽  
The Self ◽  
Poly Vinyl Alcohol ◽  
Physical Interaction ◽  
Self Healing ◽  
Wearable Electronics ◽  
Pva Hydrogel

Abstract The autonomously self-healable all-in-one supercapacitor is prepared by in situ rapid polymerization of electrode materials on the surface of self-healing poly (vinyl alcohol) (PVA) hydrogel electrolyte containing sulphuric acid (H2SO4). The self-healing PVA electrolyte has been achieved by physical interaction, in which dynamic hydrogen bonds between PVA chains can readily break and reform, allowing PVA hydrogel electrolyte to self-heal and regain its mechanical and electrochemical properties. The obtained PVA hydrogel displays fast self-healing capability, reliable mechanical performance (stress at 290 KPa after stretching to 238 %) and high ionic conductivity (57.8 mS cm− 1). Based on these excellent properties, an all-in-one supercapacitor with self-healing characteristics is assembled by in situ polymerization of aniline on the surface of self-healable PVA electrolyte. The self-healable all-in-one supercapacitor exhibits specific capacitance 470 mF cm− 2 at current density of 0.2 mA cm− 2 and energy density 32 µWh cm− 2 at power density 100 µW cm− 2. The broken device can be repaired itself and there is a 63% capacitance retention for the healable supercapacitor. This self-healing supercapacitor will promote the development of self-healing energy storage devices in wearable electronics.

scholarly journals Self-Healing Hydrogels Based on Sodium Carboxymethyl Cellulose/Poly(vinyl alcohol) Reinforced with Montmorillonite

2021 ◽  
Vol 12 (4) ◽  
pp. 4770-4779
Keyword(s):  
Vinyl Alcohol ◽  
Carboxymethyl Cellulose ◽  
The Self ◽  
Sodium Carboxymethyl Cellulose ◽  
Strong Hydrogen Bond ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Green Process ◽  
Hydrogen Bond Formation ◽  
Healing Efficiency

Currently, self-healing hydrogels prepared from the green process have been studied for various applications, especially in the biomedical field. This work fabricated the self-healing hydrogel based on sodium carboxymethyl cellulose/poly(vinyl alcohol)/montmorillonite by acidifying the mixture with citric acid. SEM measurements showed well-dispersed montmorillonite in the hydrogels. Cytotoxicity values >100% were seen with montmorillonite added, which indicated cell growth and no cell toxicity. Montmorillonite addition not only reinforced the networks but also improved self-healing ability. The tensile strength of the original uncut hydrogel with montmorillonite (P1C8M1) was 61 kPa, whereas the healed hydrogel showed 57 kPa. The hydrogel healed completely within 10 days, without any cracks, i.e., a 93% healing efficiency, or higher than the ~60% of the non-reinforced hydrogel. This confirmed strong hydrogen bond formation between the polymer and montmorillonite. The self-healing ability of this non-toxic hydrogel, reinforced with montmorillonite, makes it valuable for use in biomedical fields.

A facile strategy to fabricate highly-stretchable self-healing poly(vinyl alcohol) hybrid hydrogels based on metal–ligand interactions and hydrogen bonding

2016 ◽  
Vol 7 (47) ◽  
pp. 7269-7277 ◽  
Author(s):  
Yan Hui ◽  
Zhi-Bin Wen ◽  
Florence Pilate ◽  
Hui Xie ◽  
Cheng-Jie Fan ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Hybrid Hydrogel ◽  
Hybrid Hydrogels ◽  
Ligand Interactions ◽  
Highly Stretchable ◽  
Metal Ligand

A novel poly(vinyl alcohol) hybrid hydrogel based on metal–ligand interactions and hydrogen bonding was fabricated, possessing highly-stretchable and self-healing properties.

Polypyrrole/PU hybrid hydrogels: electrically conductive and fast self-healing for the potential application in body-monitor sensor

2021 ◽  
Author(s):  
Zhanyu Jia ◽  
Guangyao Li ◽  
Juan Wang ◽  
shouhua Su ◽  
Jie Wen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Potential Application ◽  
Self Healing ◽  
Electrically Conductive ◽  
Sensor Application ◽  
Hybrid Hydrogels ◽  
Health Monitor

Conductivity, self-healing and moderate mechanical properties are necessary for multifunctional hydrogels which have great potential in health-monitor sensor application. However, the combination of electrical conductivity, self-healing and good mechanical properties...

scholarly journals Self-Healing Polymer-Clay Hybrids by Facile Complexation of a Waterborne Polymer with a Clay

2021 ◽  
Author(s):  
Aranee Pleng Teepakakorn ◽  
Makoto Ogawa
Keyword(s):  
Vinyl Alcohol ◽  
Aqueous Media ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Smectite Clay

Water-induced self-healing materials were prepared by the hybridization of a water-soluble polymer, poly(vinyl alcohol), with a smectite clay by mixing in an aqueous media and subsequent casting. Without using chemical...

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