scholarly journals A highly selective protein adsorber via two-step surface-initiated molecular imprinting utilizing a multi-functional polymeric scaffold on a macroporous cellulose membrane

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 11012-11019 ◽  
Author(s):  
Dejing Liu ◽  
Mathias Ulbricht
Keyword(s):  
Molecular Imprinting ◽  
Surface Grafting ◽  
Cellulose Membrane ◽  
Binding Selectivity ◽  
Polymeric Scaffold ◽  
P Protein ◽  
Photochemical Initiation ◽  
Cellulose Membranes

Protein-imprinted cellulose membranes with tailored binding selectivity have been prepared by two-step surface grafting based on an orthogonal photochemical initiation.

Multilevel/hierarchical nanocomposite imprinted regenerated cellulose membranes for high-efficiency separation: A selective recognition method with Au/PDA-loaded surface

2021 ◽  
Author(s):  
Ming Yan ◽  
Yilin Wu ◽  
Rongxin Lin ◽  
Faguang Ma ◽  
Zhongyi Jiang
Keyword(s):  
Molecular Imprinting ◽  
High Efficiency ◽  
Selective Separation ◽  
Selective Recognition ◽  
Regenerated Cellulose ◽  
Separation Performance ◽  
Recognition Method ◽  
Membrane Materials ◽  
Loaded Surface ◽  
Cellulose Membranes

Although many researchers have done lots of studies on improving the selective separation performance of membrane materials, conceptions and applications of membrane-based molecular imprinting separation&recognition with both high permselectivity and...

Surface Modification of Cellulose Membrane by Air Plasma Treatment

2013 ◽  
Vol 770 ◽  
pp. 112-115
Author(s):  
Nawal Binhayeeniyi ◽  
Adinan Jehsu ◽  
Mancharee Sukpet ◽  
Safitree Nawae
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Surface Modifications ◽  
Contact Angles ◽  
Cellulose Membrane ◽  
Air Plasma ◽  
Before And After ◽  
Cellulose Membranes ◽  
Hydrophilic Membranes ◽  
Air Plasma Treatment

Low-temperature air plasma was used to treat the cellulose membranes by varying the period of time from 10 to 30 minutes. The surfaces of membranes were changed from hydrophobic to hydrophilic membranes. The contact angles of treated membranes were increased when increasing time to treat. The surface modifications of membrane before and after treated were characterized by SEM. It is shown that air plasma treatment is used to improve the roughness. The dielectric property was also studied.

scholarly journals Surface modification of cellulose membranes

2017 ◽  
Author(s):  
Eric Ziemann
Keyword(s):  
Surface Modification ◽  
Short Review ◽  
Cellulose Membrane ◽  
Green Approach ◽  
Concise Overview ◽  
Surface Functionalisation ◽  
Cellulose Membranes ◽  
Grafting From

This short review is intended to give a concise overview of methods used in the modification of polymeric cellobiose fibres, with a focus on the surface functionalisation of commercially available cellulose membranes in particular. Reliable and readily available methods will be highlighted, as well as a green approach to grafting-from cellulose membrane composites.

scholarly journals Chitosan Pad, Cellulose Membrane, or Gelatin Sponge for Peridural Bleeding: An Efficacy Study on a Lumbar Laminectomized Rat Model

2018 ◽  
Vol 12 (2) ◽  
pp. 195-201 ◽  
Author(s):  
Surachai Sae-Jung ◽  
Punyawat Apiwatanakul
Keyword(s):  
Rat Model ◽  
Gelatin Sponge ◽  
Cellulose Membrane ◽  
Sprague Dawley ◽  
Bleeding Volume ◽  
Sprague Dawley Rats ◽  
Spinous Processes ◽  
Hemorrhage Volume ◽  
Cellulose Membranes ◽  
To Receive

<sec><title>Study Design</title><p>Experimental study in an animal model.</p></sec><sec><title>Purpose</title><p>This study aims to evaluate the hemostatic properties of four common hemostatic materials including the chitosan clot pad, absorbable gelatin sponge, cellulose membrane, and gauze on peridural bleeding using a rat model.</p></sec><sec><title>Overview of Literature</title><p>Intraoperative bleeding during spinal surgery can lead to morbidities. Hemostatic materials have been developed, but the efficacy of these materials on peridural bleeding remains unclear.</p></sec><sec><title>Methods</title><p>Forty 8-week-old Sprague-Dawley rats were used in this study. Under adequate anesthesia, each rat was posteriorly dissected to their L5 and L6 spinous processes. Bleeding from muscles and soft tissue dissections was stopped before lumbar bone cutting. Immediately after the L5–L6 laminae were cut and removed, the rats were randomly allocated to receive one of the abovementioned hemostatic materials. All hemostatic materials were placed over the raw surface of cut bone and dura and changed every 60 seconds. The procedure was stopped when there was no further bleeding. Time to staunching and amount of bleeding were recorded for statistical analysis.</p></sec><sec><title>Results</title><p>The respective mean±standard deviation hemorrhage volume and time for the cellulose membrane, gelatin sponge, chitosan pad, and gauze were 1.19±0.44, 1.03±0.72, 0.96±0.57, and 1.98±0.62 mL, respectively, and 2.9±0.6, 2.1±0.6, 1.7±0.5, and 2.9±1.0 minutes, respectively. The overall bleeding volumes for the cellulose membrane, gelatin sponge, and chitosan pad were significantly lower than the overall bleeding volume for gauze.</p></sec><sec><title>Conclusions</title><p>Chitosan clot pads, gelatin sponges, and cellulose membranes have better hemostatic properties than gauze. The chitosan pad had the lowest average bleeding volume, followed by gelatin sponge and cellulose membrane.</p></sec>

Optical Transduction Schemes for Molecularly Imprinted Polymer Sensors

2003 ◽  
Vol 787 ◽  
Author(s):  
George M. Murray ◽  
Glen E. Southard
Keyword(s):  
Molecular Imprinting ◽  
Molecularly Imprinted Polymers ◽  
Subsequent Removal ◽  
Molecularly Imprinted ◽  
Polymeric Scaffold ◽  
Polymer Sensors ◽  
Highly Sensitive ◽  
Directional Bonding ◽  
Chemically Selective ◽  
Structural Memory

ABSTRACTMolecular imprinting is a useful technique for making a chemically selective binding site. [1] The method involves building a synthetic polymeric scaffold of molecular compliments containing the target molecule with subsequent removal of the target to leave a cavity with a structural “memory” of the target. Molecularly imprinted polymers can be employed as selective adsorbents of specific molecules or molecular functional groups. Sensors for specific molecules can be made using optical transduction through chromophores residing in the imprinted site. The use of metal ions as chromophores can improve selectivity due to directional bonding. The combination of molecular imprinting and spectroscopic selectivity can result in sensors that are highly sensitive and nearly immune to interferences. [2]

scholarly journals Piroxicam Percutaneous Permeation from Gels Through Membrane Models of Shed Snakeskin and Cellulose

2021 ◽  
Vol 8 (2) ◽  
pp. 66
Author(s):  
Anis Yohana Chaerunisaa ◽  
Marline Abdassah ◽  
Jutti Levita ◽  
Ellin Febrina ◽  
Ulfinana Hafni
Keyword(s):  
Topical Administration ◽  
Permeation Rate ◽  
Cellulose Membrane ◽  
Percutaneous Permeation ◽  
Membrane Models ◽  
Gel Preparation ◽  
The One ◽  
Cellulose Membranes ◽  
Permeation Test

Skin has a very important role in determining percutaneous absorption of active substance in topical administration. Study on percutaneous permeation of piroxicam from gel had been conducted using Franz Diffusion Cell with membrane model of shed snakeskin and cellulose. Piroxicam gels were made using Aqupec HV-505 base with 0; 2.5; 5; and 7.5% of DMSO as an enhancer. The results showed that the most stable gel preparation was the one with 5% DMSO (F2), so it was used for further investigation to which percutaneous permeation test. The permeation test was conducted in preparation without and with 5% DMSO (F2) in vitro through shed snakeskin and cellulose membranes. The results showed that F2 increased the permeation rate by as much as 0.0281% per minute. In comparison, the permeation rate of formulation without DMSO (F0) was 0.012% per minute. It can be concluded that DMSO can increase piroxicam penetration through shed snakeskin. Permeation study using cellulose membrane on formula F2 revealed permeation rate as much as 0.006% per minute whereas that without DMSO (F0) was 0.0112% per minute.Keywords: DMSO, cellulose membrane, percutaneous permeation, piroxicam, shed snakeskin.

scholarly journals Nanofiber-Based Membrane Separators for Lithium-ion Batteries

2015 ◽  
Vol 1718 ◽  
pp. 157-161 ◽  
Author(s):  
Mataz Alcoutlabi ◽  
Hun Lee ◽  
Xiangwu Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Polyvinylidene Fluoride ◽  
High Performance ◽  
Lithium Ion ◽  
Cellulose Membrane ◽  
Acetate Solution ◽  
Electrolyte Uptake ◽  
Fibrous Cellulose ◽  
Fibrous Membranes ◽  
Cellulose Membranes

ABSTRACTNanofiber-based membranes were prepared by two different methods for use as separators for Lithium-ion batteries (LIBs). In the first method, Electrospinning was used for the fabrication of Polyvinylidene fluoride PVDF nanofiber coatings on polyolefin microporous membrane separators to improve their electrolyte uptake and electrochemical performance. The nanofiber-coated membrane separators show better electrolyte uptake and ionic conductivity than that for the uncoated membranes. In the second method, Forcespinning® (FS) was used to fabricate fibrous cellulose membranes as separators for LIBs. The cellulose fibrous membranes were made by the Forcespinning® of a cellulose acetate solution precursor followed by a subsequent alkaline hydrolysis treatment. The results show that the fibrous cellulose membrane-based separator exhibits high electrolyte uptake and good electrolyte/electrode wettability and therefore can be a good candidate for high performance and high safety LIB separators.

scholarly journals Effect of water and alkali on purification bacterial cellulose membrane from Kombucha

2021 ◽  
Vol 10 (15) ◽  
pp. e526101523267
Author(s):  
Letícia Pereira dos Santos Barbosa de Sousa ◽  
Priscila Maria Sarmeiro Correa Marciano Leite ◽  
Angela Aparecida Vieira ◽  
Anderson Carlos Faria ◽  
Lucia Vieira
Keyword(s):  
Bacterial Cellulose ◽  
Sodium Hydroxide Solution ◽  
Starter Culture ◽  
Raw Material ◽  
Crystalline Cellulose ◽  
Cellulose Membrane ◽  
Fashion Industry ◽  
Fermented Product ◽  
Bacterial Cellulose Membrane ◽  
Cellulose Membranes

Bacterial cellulose membrane (BCM) is a biomaterial synthesized by bacteria of the genus Gluconocetobacter hansenii with a higher degree of purity than plant cellulose. The commonly used raw material for manipulating bacterial cellulose is kombucha, a beverage consumed by a vast population around the world that promises health benefits. The beverage is composed of tea species Camellia sinenses and a carbon source, refined sucrose, and a starter culture of bacteria and yeast with 10% fermented tea (starter tea) to activate the fermentative process. The Kombucha’s bacterial cellulose membranes (KBCM) are formed over 7 to 10 days on the surface of the fermented product and have the appearance of a gelatinous membrane, this being the by-product of interest. In this work, the objective was to obtain the membrane composed of cellulose via Kombucha and purify it to obtain crystalline cellulose. The purification was performed with distilled water and 0.5M NaOH sodium hydroxide solution to remove residues from the fermentation, successfully removing sugars and bacteria. At the end of the experiments, a lighter film was obtained with coloration close to white, and comparative analyses were performed to verify the structural chemical composition, crystallinity, and morphology of the samples by techniques FTIR, DRX, and SEM, respectively. Then, once the biomaterial was purified, the range of applications expanded to several products to meet the biomedical area, sustainable packaging, and even the fashion industry.

Hemodialysis Membrane Prepared from Bacterial Cellulose/Lithium Chloride/N,N-Dimethylacetamide Solution

2014 ◽  
Vol 1048 ◽  
pp. 395-399 ◽  
Author(s):  
Jia Zhi Yang ◽  
Guang Mei Liu ◽  
Dong Ping Sun
Keyword(s):  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Phase Inversion ◽  
Inversion Method ◽  
Regenerated Cellulose ◽  
Vitamin B ◽  
Cellulose Membrane ◽  
Cellulose Membranes ◽  
Phase Inversion Method ◽  
Percentage Porosity

A new bacterial cellulose regenerated cellulose membrane (RBC) has been prepared by phase inversion method in LiCl/DMAC solution. The effects of coagulation concentrations on the physical properties of the RBC membranes were studied and optimized. Features of the RBC of membranes obtained using 0%~40% N,N-Dimethylacetamide (DMAC), such as water absorption percentage, porosity (Pr), ultrafilter rate (UFR), and tensile strength were investigated. The RBC membranes prepared with 40% DMAC solution as coagulant exhibit a smooth surface and a high tensile strength with suitable UFR. RBC showed improved permeabilities for urea and vitamin B12when compared with commercial cellulose membranes.

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