Preparation, Characterization and Biocompatibility of Regenerated Cellulose/PVA Blend Membranes in 1-Allyl-3-Methyimidazolium Chloride

2011 ◽  
Vol 179-180 ◽  
pp. 1108-1111 ◽  
Author(s):  
Yun Lu ◽  
Yi Xing Liu ◽  
Hai Peng Yu ◽  
Qing Feng Sun
Keyword(s):  
Ionic Liquid ◽  
Phase Separation ◽  
Polyvinyl Alcohol ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Sem Images ◽  
Pure Cellulose ◽  
Blend Membranes

Regenerated cellulose/polyvinyl alcohol (PVA) blend membranes were prepared from a solution of cellulose and PVA in an ionic liquid of 1-allyl-3-methyimidazolium chloride (AMImCl). SEM images showed that the phase separation on the mixture was severely formed when the content of PVA was higher than 10% by volume. However, when the content of PVA in the mixture was lower than 6%, the cellulose and PVA were well-distributed. The regenerated blend membranes using the AMImCl presenting reasonable crystallinity were superior to those of regenerated pure cellulose membrane. In conclusion, the compatible properties of blend membranes from regenerated cellulose/PVA (6%) were improved and the blend membranes kept original biodegradability.

scholarly journals A Green Triboelectric Nano-Generator Composite of Degradable Cellulose, Piezoelectric Polymers of PVDF/PA6, and Nanoparticles of BaTiO3

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 506 ◽  
Author(s):  
Zhuangzhi Sun ◽  
Lu Yang ◽  
Sicheng Liu ◽  
Jintao Zhao ◽  
Zhiwei Hu ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Output Voltage ◽  
Short Circuit ◽  
Open Circuit ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Output Current ◽  
Pure Cellulose ◽  
Circuit Output ◽  
Peak Value

In this paper, a kind of green triboelectric nano-generator based on natural degradable cellulose is proposed. Different kinds of regenerated cellulose composite layers are prepared by a blending doping method, and then assembled with poly(tetrafluoroethylene) (PTFE) thin films to form tribioelectric nanogenerator (TENG). The results show that the open circuit output voltage and the short circuit output current using a pure cellulose membrane is 7.925 V and 1.095 μA. After adding a certain amount of polyamide (PA6)/polyvinylidene fluoride (PVDF)/barium titanate (BaTiO3), the open circuit output voltage peak and the peak short circuit output current increases by 254.43% (to 20.155 V) and 548.04% (to 6.001 μA). The surface morphology, elemental composition and functional group of different cellulose layers are characterized by Scanning Electronic Microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and tested by the electrochemical analyze. Moreover, after multiple assembly and rectification processing, the electrical output performance shows that the peak value of open-circuit output voltage and the peak value of short circuit output current increases by 132.06% and 116.13%. Within 500 s of the charge-discharge test, the single peak charge reached 3.114 V, and the two peak charges reached 3.840 V. The results demonstrate that the nano-generator based on cellulose showed good stability and reliability, and the application and development of natural biomaterials represented by cellulose are greatly promoted in miniature electronic sensing area.

scholarly journals Ionic Liquid Regenerated Cellulose Membrane Electroless Plated By Silver Layer For ECG Signal Monitoring

2021 ◽  
Author(s):  
Xueli Fu ◽  
Yanping Wang ◽  
Wei Wang ◽  
Dan Yu
Keyword(s):  
Ionic Liquid ◽  
Skin Irritation ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Ecg Signal ◽  
Contact Impedance ◽  
Skin Contact ◽  
Dry Electrode ◽  
Wide Range

Abstract Flexible electrodes have attracted the interest of a wide range of people because they can monitor human health signals like ECG, EMG and EEG as wearable devices. However, PDMS-based membrane electrodes have the problem of difficulty in depositing metal layers, while fabric electrodes have high contact impedance. Furthermore, the widely used Ag/AgCl electrodes have the shortcomings of skin inflammation or skin irritation. Therefore, we fabricate a skin-like electrical conductive electrode via electroless silver plating on the surface of regenerated cellulose membrane, in which the cellulose membrane is obtained by the dissolution of cotton fiber with green solvent ionic liquid [Bmim]Cl. The as-prepared biocompatible electrode with low skin-electrode contact impedance can be used as a dry electrode for a long-term period of use. The impedance at 700 Hz is only 8 kΩ/cm2, and the conductivity can reach 252 s/cm. After 5 hours of wear, the skin contact impedance of the electrode was only 10 kΩ/cm2 under 700 Hz(when AgNO3 was used at a concentration of 0.20 mol/L). Importantly, the electrodes not only provide a stable and clear ECG signal, but also offer a high level of comfort and low impedance, when used for long-term health monitoring.

Synthesis, Characterization and Application of N,N-Dimethyl-N-Sulfoethan Ammonium tetra-Chloro Aluminate: A Novel micro-Heterogeneous Cata-lyst for Synthesis of tri-Arylmethanes

2020 ◽  
Vol 17 ◽  
Author(s):  
Saeid Azimi ◽  
Niloofar Mohamadighader
Keyword(s):  
Ionic Liquid ◽  
Heterogeneous Catalyst ◽  
Mass Spectroscopy ◽  
Aromatic Aldehydes ◽  
Solid Catalyst ◽  
Sem Images ◽  
One Pot ◽  
Acidic Catalyst ◽  
Eds Analysis ◽  
Ft Ir

Abstract: A new solid catalyst was synthesized from an ionic liquid and heterogenised by changing anion reaction. The new heterogeneous acidic catalyst was characterized by SEM images, EDS analysis, AFM images, Ft-IR, HNMR, 13CNMR and Mass Spectroscopy. It was applied to synthesis of tri-arylmethanes throughout one-pot tri-component reactions among aromatic aldehydes, N,N-dimethylaniline and other carbonic nucleophiles such as anisole and indole. Hence, synthesis of convenient and inexpensive micro-heterogeneous catalyst was introduced, the efficiency of which was confirmed. Also, various useful products were synthesized throughout this simple and clean procedure.

scholarly journals Correction to “Recycling of Superbase-Based Ionic Liquid Solvents for the Production of Textile-Grade Regenerated Cellulose Fibers in the Lyocell Process”

2020 ◽  
Vol 8 (49) ◽  
pp. 18345-18345
Author(s):  
Sherif Elsayed ◽  
Jussi Helminen ◽  
Sanna Hellsten ◽  
Chamseddine Guizani ◽  
Joanna Witos ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Cellulose Fibers ◽  
Regenerated Cellulose

A graphene oxide facilitated a highly porous and effective antibacterial regenerated cellulose membrane containing stabilized silver nanoparticles

Cellulose ◽  
2014 ◽  
Vol 21 (6) ◽  
pp. 4261-4270 ◽  
Author(s):  
Soon Wei Chook ◽  
Chin Hua Chia ◽  
Sarani Zakaria ◽  
Mohd Khan Ayob ◽  
Nay Ming Huang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Highly Porous

Bionanocomposites of regenerated cellulose/zeolite prepared using environmentally benign ionic liquid solvent

2014 ◽  
Vol 106 ◽  
pp. 326-334 ◽  
Author(s):  
Mohammad Soheilmoghaddam ◽  
Mat Uzir Wahit ◽  
Wong Tuck Whye ◽  
Noel Ibrahim Akos ◽  
Raheleh Heidar Pour ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Environmentally Benign ◽  
Regenerated Cellulose

Isolation of Immunoglobulin from Chicken Egg Yolk using Single-Stage Ultrafiltration with 100-kDa Regenerated Cellulose Membranes

2011 ◽  
Vol 7 (1) ◽  
Author(s):  
Jianguo Liu ◽  
Juan Yang ◽  
Hai Xu ◽  
Hu Zhu ◽  
Jianbo Qu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Egg Yolk ◽  
Single Stage ◽  
Regenerated Cellulose ◽  
Cellulose Membrane ◽  
Permeate Flux ◽  
Operational Parameters ◽  
Solution Ph ◽  
Chicken Egg ◽  
Chicken Egg Yolk

The aim of this work is to develop a membrane-based cost-effective process for the rapid isolation of immunoglobulin from chicken egg yolk. It was found that a single-stage ultrafiltration using a 100 kDa molecular weight cut-off regenerated cellulose membrane could be employed to isolate immunoglobulin from the crude feedstock. The effects of operational parameters (solution pH, ionic strength, stirring speed and permeate flux) on the transmission of immunoglobulin and the presence of impurity protein with molecular weight close to immunoglobulin were quantified using the parameter scanning ultrafiltration technique. Under optimized conditions, the purity of immunoglobulin obtained was about 85 percent after the single-stage ultrafiltration process, and the recovery of immunoglobulin from the feedstock was 91 percent.

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