Trends and Developments in the Manufacturing of Polymer Nanofibrils with the Electrospinning Technique

2013 ◽  
Vol 446-447 ◽  
pp. 1298-1303
Author(s):  
Raj Das ◽  
Nathaniel James Burbery
Keyword(s):  
Polymer Solution ◽  
Polymeric Materials ◽  
Cost Effective ◽  
Electrostatic Forces ◽  
Electrospinning Technique ◽  
Easy Task ◽  
Commercial Success ◽  
Commercial Potential ◽  
Current Trends ◽  
Rapid Pace

Electrospinning is a technique that is exceptionally well-suited for reliable, cost-effective production that uses electrostatic forces to form and manipulate a jet of polymer solution to form nanosized, fibrillar polymeric materials. However, producing smooth (non-beaded) fibres with truly nanosized diameters is not an easy task and is highly influenced by polymer selection. Substantial versatility also exists in the properties and morphologies of the nanomaterials produced with this method. Knowledge of the fundamental features and current trends within the sector of electrospinning are enabling the reliable, effective production of materials that would be most suitable for a variety of applications. This article will discuss each of these issues and will demonstrate the usefulness of the electrospinning technique with a brief overview of the key applications of interest including those which have obtained commercial success. Overall, this article will demonstrate how electrospinning is a unique and effective tool that continues to develop at a rapid pace, with substantial commercial potential yet to be unlocked.

scholarly journals Current trends in apple tree breeding (Malus Mill.)

2020 ◽  
pp. 5-11
Author(s):  
O. V. Kalinina ◽  
Yu. V. Burmenko ◽  
N. Yu. Svistunova
Keyword(s):  
Cost Effective ◽  
Tree Breeding ◽  
Industrial Sector ◽  
Crop Breeding ◽  
Relevant Today ◽  
Planting Material ◽  
Current Trends ◽  
Breeding Programmes ◽  
Apple Cultivars ◽  
Modern Breeding

Apples are among the most significant fruit crops in Russian horticulture. The wide variety, as well as the prominent economic potential of the crop, both enable its cultivation across many climate zones and bring orchard farming in general to the attention of investors in the agro-industrial sector. Breeders have met the rising challenges inherent in creating varieties that are superior in terms of productivity, abiotic- and biotic stress resistance, fruit quality and competitive fast-return capacity. In the present article, current research in apple breeding including methods for intensive selection is reviewed with a focus on breeding programmes for creating adaptive varieties having a high commercial and consumer value. Classical breeding can be complemented with modern techniques for an earlier selection of commercially valuable genotypes, identification of primary genotypes, as well as the creation of new donors and cultivars. The research achievements of leading national institutions in the development of apple varieties reflect additions to the Catalog of State-Permitted Cultivars of Agricultural Crops over the last decade. Most of the 422 permitted adapted apple cultivars are highly marketable due to having best-before-consumption dates in the winter. Despite current success in national orchard farming, further endeavours in crop breeding remain relevant today. Comprehensive research engaging genetics, physiology, phytopathology, virology, agrochemistry and nursery is essential for improving modern breeding programmes with the aim of supplying producers with high-quality planting material for a cost-effective, low pesticide, environmentallystable product.

scholarly journals Cellulose Aerogels for Thermal Insulation in Buildings: Trends and Challenges

Coatings ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 345 ◽  
Author(s):  
Danny Illera ◽  
Jaime Mesa ◽  
Humberto Gomez ◽  
Heriberto Maury
Keyword(s):  
Thermal Stability ◽  
Thermal Insulation ◽  
Gaseous Phase ◽  
Energy Demand ◽  
Cost Effective ◽  
Silica Aerogels ◽  
Moisture Sensitivity ◽  
Knudsen Effect ◽  
Cellulose Aerogel ◽  
Current Trends

Cellulose-based aerogels hold the potential to become a cost-effective bio-based solution for thermal insulation in buildings. Low thermal conductivities (<0.025 W·m−1·K−1) are achieved through a decrease in gaseous phase contribution, exploiting the Knudsen effect. However, several challenges need to be overcome: production energy demand and cost, moisture sensitivity, flammability, and thermal stability. Herein, a description and discussion of current trends and challenges in cellulose aerogel research for thermal insulation are presented, gathered from studies reported within the last five years. The text is divided into three main sections: (i) an overview of thermal performance of cellulose aerogels, (ii) an identification of challenges and possible solutions for cellulose aerogel thermal insulation, and (iii) a brief description of cellulose/silica aerogels.

The Growth of Advanced Packaging: An Overview of the Latest Technology Developments, Applications and Market Trends

2015 ◽  
Vol 2015 (1) ◽  
pp. 000001-000005 ◽  
Author(s):  
R. Beica ◽  
A. Ivankovic ◽  
T. Buisson ◽  
S. Kumar ◽  
J. Azemar
Keyword(s):  
Semiconductor Industry ◽  
Cost Effective ◽  
Cmos Technology ◽  
Advanced Technology ◽  
Current Trends ◽  
Advanced Packaging ◽  
Scaling Process ◽  
Market Trends ◽  
The Cost ◽  
Technology Nodes

The semiconductor industry, for more than five decades, has followed Moore's law and was driven by miniaturization of the transistors, scaling the CMOS technology to smaller and more advanced technology nodes while, at the same time, reducing the cost. The industry is reaching now limitations in continuing this scaling process in cost effective way. While technology nodes continue to be developed and innovative solutions are being proposed, the investment required to bring such technologies to production are significantly increasing. To overcome these limitations, new packaging technologies have been developed, enabling integration of more performing as well as various type of devices within the same package. This paper will provide an overview of current trends seen in the industry across all the packaging platforms (WLCSP1, FanOut2, Embedded Die2, Flip Chip3 and 3DIC4). Challenges, applications, positioning of the different packaging technologies by market segments (from low end to high end applications) and changes of the markets and drivers, growth rates and roadmaps will be presented. Global capacities and demands and the landscape of the packaging industry will be reviewed. Examples of teardowns to illustrate the latest packaging techniques for various devices used in latest products will be included.

CHARACTERIZATION OF PCL/ZEOLITE ELECTROSPUN MEMBRANE FOR THE REMOVAL OF SILVER IN DRINKING WATER

2017 ◽  
Vol 79 (1-2) ◽  
Author(s):  
Muhammad Syhamiel Iqhwan Che Rusli ◽  
Mohd Izzat Hassan ◽  
Naznin Sultana ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Drinking Water ◽  
Polymer Solution ◽  
Composite Membranes ◽  
Zeolite Membrane ◽  
Layer By Layer ◽  
Electrospun Membrane ◽  
Separation Processes ◽  
Electrospinning Technique ◽  
Water Contact

The presence of heavy metals in drinking water leads to several health problems. In this study, polycaprolactone (PCL)/zeolite nano or microfiber electrospun composite membranes, diameter range of the fibers was 2 µm- 6 µm, were fabricated by using electrospinning technique. The membranes separation processes have played very crucial roles in water purification industry. Apart from that, the membranes are prepared with biocompatible, non-toxic materials which will be eco-friendly. In order to produce electrospun membrane, 15% (w/v) of PCL polymer solution was dissolved in acetone and 20% (w/w) zeolite was incorporated into the PCL polymer solution. Electricity charged jet of polymer solution from the syringe formed an electrostatics field when the high voltage of 20kV was applied. Scanning electron micrograph (SEM) and energy dispersive spectroscopy (EDX) implemented to indicate the characterization of membranes. The water contact angle of PCL/zeolite membrane was 119.53±5.24 which was almost same as pure PCL membrane (107.73±8.54). The inducible results obtained in this study suggested that electrospun pcl and polycaprolactone/zeolite layer by layer nanofibrous membranes can be a favored verdict for the removal of heavy metal ions.

scholarly journals Fabrication and Characterization of Polylactic Acid Electrospun Scaffolds Modified with Multi-Walled Carbon Nanotubes and Hydroxyapatite Nanoparticles

Biomimetics ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 43
Author(s):  
Athanasios Kotrotsos ◽  
Prokopis Yiallouros ◽  
Vassilis Kostopoulos
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Polylactic Acid ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Cost Effective ◽  
Electrospinning Process ◽  
Wide Range ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The solution electrospinning process (SEP) is a cost-effective technique in which a wide range of polymeric materials can be electrospun. Electrospun materials can also be easily modified during the solution preparation process (prior SEP). Based on this, the aim of the current work is the fabrication and nanomodification of scaffolds using SEP, and the investigation of their porosity and physical and mechanical properties. In this study, polylactic acid (PLA) was selected for scaffold fabrication, and further modified with multi-walled carbon nanotubes (MWCNTs) and hydroxyapatite (HAP) nanoparticles. After fabrication, porosity calculation and physical and mechanical characterization for all scaffold types were conducted. More precisely, the morphology of the fibers (in terms of fiber diameter), the surface properties (in terms of contact angle) and the mechanical properties under the tensile mode of the fabricated scaffolds have been investigated and further compared against pristine PLA scaffolds (without nanofillers). Finally, the scaffold with the optimal properties was proposed as the candidate material for potential future cell culturing.

scholarly journals Is Outpatient Thyroid Surgery for Everyone?

2017 ◽  
Vol 10 ◽  
pp. 117955061772442 ◽  
Author(s):  
Dale Butler ◽  
Sarah Oltmann
Keyword(s):  
Patient Outcomes ◽  
Postoperative Bleeding ◽  
Hospital Setting ◽  
Cost Effective ◽  
High Volume ◽  
Outpatient Setting ◽  
Current Trends ◽  
Surgeon Experience ◽  
Reduced Costs ◽  
Inpatient Basis

Thyroidectomy is a common surgical procedure. Traditionally, surgeons have performed thyroidectomy on an inpatient basis. However, consistent with current trends in surgery, some practices are transitioning thyroidectomy to an outpatient setting. Although concerns for hypocalcemia and postoperative bleeding exist regardless of surgeon experience, multiple studies demonstrate that outpatient thyroidectomy is safe in the hands of high-volume surgeons. Indeed, experienced thyroid surgeons who perform thyroidectomy in an outpatient setting experience excellent patient outcomes and reduced costs. However, outpatient thyroidectomy may not be suitable for all surgeons, hospitals, or patients. When evaluating whether to implement an outpatient thyroid program, a practice should consider a number of important factors including the team performing the procedure, the hospital, and the patient. With the appropriate staff education and experience, hospital setting, and patient selection, practices in a multitude of settings can successfully develop a safe, cost-effective outpatient thyroid program.

Effects of Processing Parameters on the Morphology and Size of Electrospun PHBV Micro- and Nano-Fibers

2007 ◽  
Vol 334-335 ◽  
pp. 1233-1236 ◽  
Author(s):  
Ho Wang Tong ◽  
Min Wang
Keyword(s):  
Tissue Engineering ◽  
Polymer Solution ◽  
Polymer Concentration ◽  
Solution Concentration ◽  
Processing Parameters ◽  
Electrospun Fibers ◽  
Effective Technique ◽  
Electrospinning Technique ◽  
Needle Diameter ◽  
Short Time

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was used to fabricate micro- and nano-fibrous, non-woven mats by electrospinning for potential tissue engineering applications. The morphology and size of electrospun fibers were assessed systematically by varying the processing parameters. It was found that the diameter of the fibers produced generally increased with electrospinning voltage, needle diameter for the polymer jet and polymer solution concentration. Beaded fibers were readily produced at low PHBV concentrations, whereas the needle was blocked within a very short time during electrospinning when the PHBV concentration was too high. At the polymer concentration of 7.5 % w/v, it was shown that beadless PHBV fibers could be generated continuously by adjusting the electrospinning parameters to appropriate values. This study has clearly demonstrated that electrospinning can be an effective technique to produce PHBV micro- and nano-fibers. It has also been shown that composite fibers containing hydroxyapatite (HA) can be produced using the electrospinning technique.

scholarly journals Investigation of Superhydrophobic/Hydrophobic Materials Properties Using Electrospinning Technique

2019 ◽  
Vol 16 (3) ◽  
pp. 0632 ◽  
Author(s):  
Jaafar Et al.
Keyword(s):  
Polymer Solution ◽  
Glass Substrate ◽  
Low Cost ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Metal Substrate ◽  
Electrospinning Technique ◽  
Electrospinning Method ◽  
Surface Alteration ◽  
Measurement Surface

     The aim of this research is to study the surface alteration characteristics and surface morphology of the superhydrophobic/hydrophobic nanocomposite coatings prepared by an electrospinning method to coat various materials such as glass and metal. This is considered as a low cost method of fabrication for polymer solutions of Polystyrene (PS), Polymethylmethacrylate (PMMA) and Silicone Rubber (RTV). Si were prepared in various wt% of composition for each solutions. Contact angle measurement, surface tension, viscosity, roughness tests were calculated for all specimens. SEM showed the morphology of the surfaces after coated. PS and PMMA showed superhydrophobic properties for metal substrate, while Si showed hydrophobic characteristics for both metal and glass substrate. Polymer solution of (15%Si/Thinner (Th)) owned best roughness for glass substrate and polymer solution of (4%PMMA/Tetrahydrofuran (THF)) owned best roughness for metal substrate.

scholarly journals A Novel Microwave Treatment to Augment the Mechanical Properties of Polymeric Materials

2020 ◽  
Vol 2 (2) ◽  
pp. 14
Keyword(s):  
Mechanical Properties ◽  
Treatment Time ◽  
Polymeric Materials ◽  
Acrylonitrile Butadiene Styrene ◽  
Cost Effective ◽  
Microwave Treatment ◽  
Similar Response ◽  
Post Processing ◽  
Time Saving ◽  
Engineering Polymers

The present study portrays a novel post-processing treatment by using microwave radiations for enhancing the mechanical properties of five commonly used engineering polymers, Poly-amide (PA), Poly-butylene-terephthalate (PBT), Poly-propylene (PP), Poly-carbonate (PC), Acrylonitrile-butadiene-styrene (ABS). The analysis revealed that the crystal structures of the polymers improved after the treatment due to a more favorable rearrangement of crystalline segments within the polymers. Furthermore, tensile properties and tribological performance of microwave treated polymers were found to be significantly better when compared to those of untreated counterparts. The tensile strength, elongation, and wear performance of PA increased by 51%, 286%, and 45%, respectively, only after a treatment of 20 seconds. A similar response was also exhibited by other polymers as well. It was noted that the optimum time for microwave treatment could vary depending on the different crystalline nature of the polymers. The degree of randomness in the molecular chains of semi-crystalline polymers is less; thus, it requires less treatment time. However, for amorphous polymers, as randomness increases, more time is needed. As such, post-processing microwave treatment of polymers has proven beneficial as a cost-effective, time-saving, and environment-friendly technique for enhancing material properties significantly.

Sign in / Sign up

Export Citation Format

Share Document