A hybrid polyvinyl alcohol/molybdenum disulfide nanosheet hydrogel with light-triggered rapid self-healing capability

2021 ◽  
Vol 9 (9) ◽  
pp. 2266-2274
Author(s):  
Wen Jing Yang ◽  
Xiaodong Wang ◽  
Rui Zhang ◽  
Yuxin Wang ◽  
Qiu Qiu ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Molybdenum Disulfide ◽  
Self Healing ◽  
Hybrid Hydrogel ◽  
Photothermal Conversion

By employing the excellent photothermal conversion properties of molybdenum disulfide (MoS2) nanosheets, a hybrid hydrogel was prepared with light-triggered rapid self-healing capability.

Fast self-healing multifunctional polyvinyl alcohol nano-organic composite hydrogel as building blocks for highly sensitive strain/pressure sensors

2021 ◽  
Author(s):  
Wenhao Zhao ◽  
Dongzhi Zhang ◽  
Yan Yang ◽  
Chen Du ◽  
Bao Zhang
Keyword(s):  
Polyvinyl Alcohol ◽  
Human Computer Interaction ◽  
Pressure Sensors ◽  
Building Blocks ◽  
Composite Hydrogel ◽  
Sensitive Strain ◽  
Self Healing ◽  
Wearable Sensor ◽  
Hybrid Hydrogel ◽  
Highly Sensitive

The conductive and biocompatible hybrid hydrogel was successfully assembled into an adhesive, flexible wearable sensor for ultra-sensitive human-computer interaction and smart detection, which holds excellent self-healing capability. This conductive, repairable...

Application of self-healing, swellable and biodegradable polymers for wound treatment

2021 ◽  
Vol 30 (Sup9a) ◽  
pp. IVi-IVx
Author(s):  
Chukwuma O Agubata ◽  
Mary A Mbah ◽  
Paul A Akpa ◽  
Godwin Ugwu
Keyword(s):  
Wound Healing ◽  
Polyvinyl Alcohol ◽  
Biodegradable Polymers ◽  
Hydroxypropyl Methylcellulose ◽  
Composite Films ◽  
Self Healing ◽  
Moisture Uptake ◽  
Folding Endurance

Aim: Self-healing, swellable and biodegradable polymers are vital materials that may facilitate the different stages of wound healing. The aim of this research was to prepare wound healing films using self-healing polyvinyl alcohol (PVA), swellable hydroxypropyl methylcellulose (HPMC), biodegradable polyglycolic acid (PGA) sutures and ciprofloxacin antibiotic for improved treatment outcome. Methods: Films were formulated through aqueous-based mixing of varying amounts of polyvinyl alcohol (10–20% weight/weight (w/w)) and hydroxypropyl methylcellulose (0.5, 1% w/w) with fixed quantities of ciprofloxacin. PGA sutures were placed as grids within the wet mixtures of the polymers and ciprofloxacin, and thereafter products were air dried. The formulated films were evaluated for swelling ratio, breaking elongation, folding endurance, moisture uptake and loss, compatibility and in vitro antibiotic release. Furthermore, in vivo wound healing was studied using excision model and histopathological examinations. Results: Swelling ratios were above 1.0 and the films were minimally stretchable, with folding endurance greater than 500. Films were stable while moisture uptake and loss were observed to be less than 30%. Among the optimised hydrogel batches, those containing 10% w/w PVA and 1% w/w HPMC with no PGA showed the highest drug release of 73%, whereas the batches with higher PGA content showed higher percentage wound size reduction with minimal scar. The completeness of wound healing with batches containing PVA, HPMC, ciprofloxacin and PGA, along with the standard, is evident considering the massive cornification, regeneration of the epithelial front and stratum spinosum. Conclusion: The findings show that polymer-based multifunctional composite films are suitable for use as dressings for improved wound healing.

scholarly journals Characterization of polyvinyl alcohol-borax/agarose (PVA-B/AG) double network hydrogel utilized for the cleaning of works of art

2020 ◽  
Author(s):  
Ehab Awad Al-Emam ◽  
Hilde Soenen ◽  
Joost Caen ◽  
Koen Janssens
Keyword(s):  
Polyvinyl Alcohol ◽  
Self Healing ◽  
Retention Capacity ◽  
Structured Surfaces ◽  
Double Network ◽  
Liquid Retention ◽  
Long Time ◽  
Cleaning Procedures ◽  
Phase Retention

Abstract Since cleaning of artworks may cause undesirable physicochemical alterations and is a nonreversible procedure, it is mandatory to adopt the proper cleaning procedure. Such a procedure should remove undesired materials whilst preserving the original surface. In this regard, numerous gels have been developed and exploited for the cleaning of various artwork surfaces. Lately, agarose (AG) and polyvinyl alcohol-borax (PVA-B) hydrogels have been widely employed as cleaning tools by conservators. Both hydrogels show some limitations in specific cleaning practices. In this work, we investigated the influence of including increased levels of agarose into PVA-B systems. For this reason, we performed a detailed characterization on the double network (DN) hydrogel including the chemical structure, the liquid phase retention, the rheological behavior, and the self-healing behavior of various PVA-B/AG double network hydrogels. These new hydrogels revealed better properties than PVA-B hydrogels and obviated their limitations. The inclusion of AG into PVA-B systems enhanced the liquid retention capacity, shape-stability, and mechanical strength of the blend. Furthermore, AG minimized the expelling/syneresis issue that occurs when loading PVA-B systems with low polarity solvents or chelating agents. The resultant double network hydrogel exhibits relevant self-healing properties. The PVA-B/AG double network is a new and useful cleaning tool that can be added to the conservators’ tool-kit. It is ideal for cleaning procedures dealing with porous and complex structured surfaces, vertical surfaces and for long time applications.

scholarly journals A muscle mimetic polyelectrolyte–nanoclay organic–inorganic hybrid hydrogel: its self-healing, shape-memory and actuation properties

2019 ◽  
Vol 7 (9) ◽  
pp. 1475-1493 ◽  
Author(s):  
Sovan Lal Banerjee ◽  
Thomas Swift ◽  
Richard Hoskins ◽  
Stephen Rimmer ◽  
Nikhil K. Singha
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Self Healing ◽  
Nanocomposite Hydrogel ◽  
Hybrid Nanocomposite ◽  
Hybrid Hydrogel ◽  
Inorganic Hybrid

In this investigation, we report a non-covalent (ionic interlocking and hydrogen bonding) strategy of self-healing in a covalently crosslinked organic–inorganic hybrid nanocomposite hydrogel, with specific emphasis on tuning its properties fitting into a muscle mimetic material.

Sandwich-like polyvinyl alcohol (PVA) grafted graphene: A solid-inhibitors container for long term self-healing coatings

2020 ◽  
Vol 383 ◽  
pp. 123203 ◽  
Author(s):  
Yunan Lin ◽  
Rongrong Chen ◽  
Yanjun Zhang ◽  
Zhu Lin ◽  
Qi Liu ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Self Healing

scholarly journals Multifunctional load-bearing hybrid hydrogel with combined drug release and photothermal conversion functions

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Yulin Jiang ◽  
Yutao Yang ◽  
Xiaoyang Zheng ◽  
Yong Yi ◽  
Xianchun Chen ◽  
...  
Keyword(s):  
Drug Release ◽  
Hybrid Hydrogel ◽  
Load Bearing ◽  
Photothermal Conversion
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