pH-dependent and self-healing properties of mussel modified poly(vinyl alcohol) hydrogels in a metal-free environment

RSC Advances ◽  
2015 ◽  
Vol 5 (100) ◽  
pp. 82252-82258 ◽  
Author(s):  
Dongjian Shi ◽  
Rongjin Liu ◽  
Weifu Dong ◽  
Xiaojie Li ◽  
Hongji Zhang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Metal Free ◽  
Simple Strategy ◽  
Ph Dependent ◽  
Free Environment ◽  
Pva Hydrogel

We describe a simple strategy towards a DOPA-based PVA hydrogel with pH-dependent and rapid self-healing properties in the absence of metal ions. The hydrogel could self-heal in 270 s which was much quicker than that prepared in the presence of Fe3+.

scholarly journals Highly Stretchable and Self-Healing Strain Sensors Based on Nanocellulose-Supported Graphene Dispersed in Electro-Conductive Hydrogels

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 937 ◽  
Author(s):  
Chunxiao Zheng ◽  
Yiying Yue ◽  
Lu Gan ◽  
Xinwu Xu ◽  
Changtong Mei ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Cellulose Nanofibers ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
Composite Gels ◽  
Highly Stretchable ◽  
Conductive Hydrogels ◽  
Pva Hydrogel

Intrinsic self-healing and highly stretchable electro-conductive hydrogels demonstrate wide-ranging utilization in intelligent electronic skin. Herein, we propose a new class of strain sensors prepared by cellulose nanofibers (CNFs) and graphene (GN) co-incorporated poly (vinyl alcohol)-borax (GN-CNF@PVA) hydrogel. The borax can reversibly and dynamically associate with poly (vinyl alcohol) (PVA) and GN-CNF nanocomplexes as a cross-linking agent, providing a tough and flexible network with the hydrogels. CNFs act as a bio-template and dispersant to support GN to create homogeneous GN-CNF aqueous dispersion, endowing the GN-CNF@PVA gels with promoted mechanical flexibility, strength and good conductivity. The resulting composite gels have high stretchability (break-up elongation up to 1000%), excellent viscoelasticity (storage modulus up to 3.7 kPa), rapid self-healing ability (20 s) and high healing efficiency (97.7 ± 1.2%). Due to effective electric pathways provided by GN-CNF nanocomplexes, the strain sensors integrated by GN-CNF@PVA hydrogel with good responsiveness, stability and repeatability can efficiently identify and monitor the various human motions with the gauge factor (GF) of about 3.8, showing promising applications in the field of wearable sensing devices.

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...

scholarly journals Linear Dynamic Viscoelasticity of Dual Cross-Link Poly(Vinyl Alcohol) Hydrogel with Determined Borate Ion Concentration

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 71
Author(s):  
Takuro Taniguchi ◽  
Kenji Urayama
Keyword(s):  
Vinyl Alcohol ◽  
Ion Concentration ◽  
Poly Vinyl Alcohol ◽  
Relaxation Dynamics ◽  
Cross Link ◽  
Dynamic Viscoelasticity ◽  
Linear Dynamic ◽  
Cross Links ◽  
Pva Gel ◽  
Pva Hydrogel

We investigated the linear dynamic viscoelasticity of dual cross-link (DC) poly(vinyl alcohol) (PVA) (DC-PVA) hydrogels with permanent and transient cross-links. The concentrations of incorporated borate ions to form transient cross-links in the DC-PVA hydrogels (CBIN) were determined by the azomethine-H method. The dynamic viscoelasticity of the DC-PVA hydrogel cannot be described by a simple sum of the dynamic viscoelasticity of the PVA gel with the same permanent cross-link concentration and the PVA aqueous solution with the same borate ion concentration (CB = CBIN) as in the DC-PVA gel. The DC-PVA hydrogel exhibited a considerably higher relaxation strength, indicating that the introduction of permanent cross-links into temporary networks increases the number of viscoelastic chains with finite relaxation times. In contrast, the relaxation frequency (ωc) (given by the frequency at the maximum of loss modulus) for the DC-PVA hydrogel was slightly lower but comparable to that for a dilute PVA solution with the same CB. This signifies that the relaxation dynamics of the DC-PVA hydrogels is essentially governed by the lifetime of an interchain transient cross-link (di-diol complex of boron). The effect of permanent cross-linking on the relaxation dynamics was observed in the finite broadening of the relaxation-time distribution in the long time region.

Porous boron nitride nanofibers as effective nanofillers for poly(vinyl alcohol) composite hydrogels with excellent self-healing performances

Soft Matter ◽  
2022 ◽  
Author(s):  
Xiangqian Gao ◽  
Tiantian Deng ◽  
Xindi Huang ◽  
Mengmeng Yu ◽  
Danyang Li ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
One Pot ◽  
One Dimensional ◽  
Composite Hydrogels ◽  
Assembly Method

A new composite hydrogels with excellent self-healing properties was prepared by combining poly(vinyl alcohol) (PVA) and boron nitride nanofibers (BNNFs) via a facile one-pot assembly method. One-dimensional porous BNNFs with...

Core‐Shell System Based on Gelatin and Poly(Vinyl Alcohol) (PVA) for Concrete Self‐Healing Applications: Synthesis, Characterization, and Optimization

2021 ◽  
Vol 398 (1) ◽  
pp. 2000194
Author(s):  
Vítor Corrêa da Costa ◽  
Fernando Gomes de Souza Junior ◽  
Luana de Castro Sousa ◽  
Kaushik Pal ◽  
Romildo Dias Tolêdo Filho
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Core Shell ◽  
Self Healing ◽  
Shell System

Self-Healing Hydrogels of Low Molecular Weight Poly(vinyl alcohol) Assembled by Host–Guest Recognition

2018 ◽  
Vol 19 (2) ◽  
pp. 626-632 ◽  
Author(s):  
Yong-Guang Jia ◽  
Jiahong Jin ◽  
Sa Liu ◽  
Li Ren ◽  
Juntao Luo ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Low Molecular Weight ◽  
Self Healing

Wear Reduction by Functional Protein Boundary Film on Poly(Vinyl Alcohol) Hydrogel

2005 ◽  
Author(s):  
K. Nakashima ◽  
Y. Sawae ◽  
T. Murakami
Keyword(s):  
Vinyl Alcohol ◽  
Film Formation ◽  
Glass Plate ◽  
Poly Vinyl Alcohol ◽  
Functional Protein ◽  
Adsorbed Film ◽  
Adsorption Condition ◽  
Boundary Film ◽  
Joint Prostheses ◽  
Pva Hydrogel

Poly(vinyl alcohol) (PVA) hydrogel is a candidate material for artificial cartilage of joint prostheses. From previous researches [1–4] it is shown that the wear of PVA hydrogel depends on the concentration of proteins in lubricants. Therefore it is considered that the adsorbed film formation by protein of albumin or γ-globulin influences upon the wear grade of PVA hydrogel. The remaining film of proteins on the glass plate was observed in fluorescence microscope. The adsorption condition of albumin and γ-globulin was different. The adsorbed film with effective reduction of the wear showed cooperative stratification of albumin and γ-globulin, but the condition of increased the wear showed separation of albumin and γ-globulin. Consequently, to reduce the wear of PVA hydrogel, cooperative stratification layers are effective.

Sign in / Sign up

Export Citation Format

Share Document