Influence of sheath solvents on the quality of ethyl cellulose nanofibers in a coaxial electrospinning process

2014 ◽  
Vol 24 (1) ◽  
pp. 695-701 ◽  
Author(s):  
Deng-Guang Yu ◽  
Xiao-Yan Li ◽  
Wei Chian ◽  
Ying Li ◽  
Xia Wang
Keyword(s):  
Ethyl Cellulose ◽  
Cellulose Nanofibers ◽  
Electrospinning Process ◽  
Coaxial Electrospinning

scholarly journals The Influence of Sheath Solvent’s Flow Rate on the Quality of Electrospun Ethyl Cellulose Nanofibers

2013 ◽  
Vol 03 (04) ◽  
pp. 1-5 ◽  
Author(s):  
Deng-Guang Yu ◽  
Xiong-Xiu Li ◽  
Jia-Wen Ge ◽  
Peng-Peng Ye ◽  
Xia Wang
Keyword(s):  
Flow Rate ◽  
Ethyl Cellulose ◽  
Cellulose Nanofibers

scholarly journals Enhancing packaging board properties using micro- and nanofibers prepared from recycled board

Cellulose ◽  
2020 ◽  
Vol 27 (12) ◽  
pp. 7215-7225
Author(s):  
Ossi Laitinen ◽  
Terhi Suopajärvi ◽  
Henrikki Liimatainen
Keyword(s):  
Choline Chloride ◽  
Cellulose Nanofibers ◽  
Deep Eutectic Solvent ◽  
Strength Properties ◽  
Chemical Pretreatment ◽  
Mechanical Grinding ◽  
Cellulose Microfibers ◽  
Board Strength ◽  
Grinding Time

Abstract In this study, cellulose microfibers and cellulose nanofibers (CNF) prepared from recycled boxboard pulp using a mechanical fine friction grinder were used as reinforcements in a board sheet. Micro- and nanofibers manufactured by mechanical grinding have typically broad particle size distribution, and they can contain both micro- and nano-sized fibrils. Deep eutectic solvent of choline chloride and urea was used as a non-hydrolytic pretreatment medium for the CNF, and reference CNF were used without any chemical pretreatment. The CNF were ground using three grinding levels (grinding time) and their dosage in the board varied from 2 to 6 wt%. The results indicate that the board properties could be tailored to obtain a balance between the processability and quality of the products by adjusting the amount of CNF that was added (2–6 wt%). A preliminary cost assessment indicated that the most economical way to enhance the board strength properties was to add around 4% of CNF with a moderate grinding level (i.e., grinding energy of 3–4 kWh/kg). Overall, the strength properties of the manufactured board sheets improved by several dozen percentages when CNF was used as the reinforcement.

Borneol-Shellac Nanofiber Membranes Fabricated Using a Modified Coaxial Electrospinning

2014 ◽  
Vol 1058 ◽  
pp. 78-82 ◽  
Author(s):  
Deng Guang Yu ◽  
Ying Xu ◽  
Song Liu ◽  
Yu Hai Wang ◽  
Xiao Duan ◽  
...  
Keyword(s):  
Physical Stability ◽  
Amorphous State ◽  
Average Diameter ◽  
Electrospinning Process ◽  
Flow Rate Ratio ◽  
Coaxial Electrospinning ◽  
High Quality ◽  
Pure Ethanol ◽  
Sheath Fluid ◽  
Nanofiber Membranes

A modified coaxial electrospinning process is developed for producing medicated nanofiber membranes of shellac. With pure ethanol as a sheath fluid, high quality borneol-loaded shellac nanofibers have been successfully fabricated using the modified coaxial process. Electron scanning microscopic observations demonstrated that the nanofibers had better quality than those fabricated using a single fluid electrospinning in terms of nanofiber diameters and their distributions. The former had an average diameter of 570 ± 80 nm under a sheath-to-core flow rate ratio of 0.25, whereas the later was 940 ± 230 nm. X-ray diffraction results verified that borneol existed in the shellac matrix in an amorphous state. The medicated nanofiber membranes could significantly improved the physical stability of borneol due to the favorable hydrogen bonding between the drug and the polymer matrix, as demonstrated by the weight loss experiments. The modified coaxial electrospinning process described here expands the capability of electrospinning process in generating high quality functional membranes.

scholarly journals Electrospun Poly(N-isopropylacrylamide)/Ethyl Cellulose Nanofibers as Thermoresponsive Drug Delivery Systems

2016 ◽  
Vol 105 (3) ◽  
pp. 1104-1112 ◽  
Author(s):  
Juan Hu ◽  
He-Yu Li ◽  
Gareth R. Williams ◽  
Hui-Hui Yang ◽  
Lei Tao ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Ethyl Cellulose ◽  
Drug Delivery Systems ◽  
Cellulose Nanofibers ◽  
Delivery Systems

Design of Coaxial Needleless Electrospinning Electrode with Respect to the Distribution of Electric Field

2014 ◽  
Vol 693 ◽  
pp. 394-399 ◽  
Author(s):  
Lucie Vysloužilová ◽  
Jan Valtera ◽  
Karel Pejchar ◽  
Jaroslav Beran ◽  
David Lukáš
Keyword(s):  
Free Surface ◽  
Electric Field ◽  
Electrostatic Field ◽  
Electric Energy ◽  
Electrospinning Process ◽  
Coaxial Electrospinning ◽  
Core Shell ◽  
Process Stability ◽  
Field Simulation ◽  
Sharp Edges

The paper is focused on the design of the electrode for needleless coaxial electrospinning. This method allows to produce core/shell nanofibers from the free surface of a polymeric two-layer. The geometry of the designed model of electrode was analyzed using the software Autodesk Simulation Multiphysics. The results of electrostatic field simulation indicate the sharp edges of the electrode as the source of high electric intensity. These sharp edges lead to the loss of the electric energy during the electrospinning process. Based on that, the new cylindrical geometry of the electrode was developed. The results of carried out experiments clearly demonstrate the enhancement of the electrospinning process stability.

scholarly journals Nonwoven Bio-Based Membranes for Removal of Micropollutants from Aqueous Water

2021 ◽  
Vol 57 (4) ◽  
pp. 34-44
Author(s):  
Ecaterina Matei ◽  
Cristina Ileana Covaliu ◽  
George Coman ◽  
Mihai Negroiu ◽  
Maria Rapa ◽  
...  
Keyword(s):  
Electrospinning Process ◽  
Attenuated Total Reflectance ◽  
Scanning Calorimetry ◽  
Chemical Methods ◽  
Physical Chemical ◽  
Activated Coal ◽  
Solid Suspension ◽  
Electrospun Membranes ◽  
Ft Ir

The aim of this paper is to obtain two types of bio-based membranes by electrospinning process: one based on polylactic acid (PLA), and PLA/polyhydroxybutyrate (PHB), and the second by coating the PLA/PHB membrane with chitosan (CS) and CS/activated coal (AC), respectively for removal of micropollutants from aqueous water. The designed bio-based electrospun membranes were analyzed through scanning electron microscopy (SEM), attenuated total reflectance (ATR) - Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), the removal of solid suspension and Pb (II) from aqueous water. The quality of filtrates was evaluated by physical-chemical methods, while the retaining of Pb (II) from wastewaters was reported.

Sign in / Sign up

Export Citation Format

Share Document