Preparation, properties and formation mechanism of cellulose/polyvinyl alcohol bio-composite hydrogel membranes

2017 ◽  
Vol 41 (14) ◽  
pp. 6564-6573 ◽  
Author(s):  
Huafeng Peng ◽  
Shaopeng Wang ◽  
Hongyao Xu ◽  
Xingwu Hao
Keyword(s):  
Polyvinyl Alcohol ◽  
Formation Mechanism ◽  
Hydrophobic Interactions ◽  
Composite Hydrogel ◽  
Hydrogel Membranes

Aggregate sheets formed by hydrophobic interactions of cellulose act as physical junctions in the cellulose/polyvinyl alcohol composite hydrogel.

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...

Preparation and performance investigation of polydimethylsiloxane microsphere/polyvinyl alcohol composite hydrogel

2018 ◽  
Vol 228 ◽  
pp. 399-402 ◽  
Author(s):  
Haining Wang ◽  
Fu Wang ◽  
Xiuqi Li ◽  
Xingping Peng ◽  
Zhipeng Ci ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Hydrogel ◽  
And Performance

Impacts of polyols and temperature on the micellization, interaction and thermodynamics behavior of the mixture of tetradecyltrimethylammonium bromide and polyvinyl alcohol

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sharmin Sultana ◽  
Abdullah Al Mamun ◽  
Shahina Aktar ◽  
Shamim Mahbub ◽  
Kareem Yusuf ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
Polyvinyl Alcohol ◽  
Hydrophobic Interactions ◽  
Specific Conductivity ◽  
Mixed Solvents ◽  
Conductivity Measurement ◽  
Micelle Formation ◽  
Tetradecyltrimethylammonium Bromide ◽  
Delta G ◽  
Free Energy Of Micellization

Abstract Herein, the aggregation manner of the mixture of polyvinyl alcohol (PVA) and tetradecyltrimethylammonium bromide (TTAB) was performed in polyols (glucose, maltose and galactose) media over 300.55–320.55 K temperatures range with 5 K interval through conductivity measurement method. The micelle formation of TTAB + PVA mixture was identified by the assessment of critical micelle concentration (CMC) from the plots of specific conductivity (κ) versus TTAB concentration. The degree of micelle ionization (α), the extent of bound counter ions (β) as well as thermodynamic properties ( Δ G m 0 ${\Delta}{G}_{m}^{0}$ , Δ H m 0 ${\Delta}{H}_{m}^{0}$ and Δ S m 0 ${\Delta}{S}_{m}^{0}$ ) of TTAB + PVA systems have been estimated. The CMC values reveal that the micelle formation of TTAB + PVA mixture experience an enhancement in the manifestation of polyols. The values of free energy of micellization ( Δ G m 0 ${\Delta}{G}_{m}^{0}$ ) are negative for the TTAB + PVA system in aqueous polyols media, suggesting a spontaneous aggregation phenomenon. The Δ H m 0 ${\Delta}{H}_{m}^{0}$ and Δ S m 0 ${\Delta}{S}_{m}^{0}$ values of TTAB + PVA systems direct that the PVA molecule interacts with TTAB through the exothermic, ion-dipole, and hydrophobic interactions. The thermodynamic properties of transfer were also determined for the move of TTAB + PVA mixture from H2O to water + polyols mixed solvents. The values of compensation temperature (T c) and intrinsic enthalpy gain ( Δ H m 0 , ∗ ${\Delta}{H}_{m}^{0,\ast }$ ) were evaluated and discussed for the studied system.

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