Effect of organic solvent on morphology and mechanical properties of electrospun syndiotactic polypropylene nanofibers

Watanabe, Kazuhiro; Nakamura, Takaki; Kim, Byoung‐Suhk; Kim, Ick‐Soo

doi:10.1007/s00289-011-0618-5

Cited by 19 publications

(15 citation statements)

References 16 publications

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“…Polypropylene nanofibers prepared with cyclohexane exhibited a rougher surface when compared to the fibers prepared with decalin, suggesting that the surface morphology of the nanofibers depend on the boiling point of each solvent [ 93 ]. When stress–strain behaviors of the nanofibers are investigated, a tensile strength of 61.4 ± 1.5 MPa with 35.2% ± 1.7% of strain, and a Young modulus of 174.6 ± 1.7 MPa was obtained for the decalin based nanofibers, whilst the cyclohexane nanofibers exhibit a tensile strength of 18.2 ± 1.1 MPa with 46.7% ± 1.2% of elongation and a Young modulus of 39.1 ± 1.4 MPa [ 94 ]. The abovementioned results were obtained from bundles of nanofibers rather than individual fibers, these properties are strongly dependent on fiber orientation within the tested sample, bonding between fibers, and slip of one fiber over another [ 94 ].…”

Section: Future Perspectivesmentioning

confidence: 99%

Past, Present and Future of Surgical Meshes: A Review

et al. 2017

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Surgical meshes, in particular those used to repair hernias, have been in use since 1891. Since then, research in the area has expanded, given the vast number of post-surgery complications such as infection, fibrosis, adhesions, mesh rejection, and hernia recurrence. Researchers have focused on the analysis and implementation of a wide range of materials: meshes with different fiber size and porosity, a variety of manufacturing methods, and certainly a variety of surgical and implantation procedures. Currently, surface modification methods and development of nanofiber based systems are actively being explored as areas of opportunity to retain material strength and increase biocompatibility of available meshes. This review summarizes the history of surgical meshes and presents an overview of commercial surgical meshes, their properties, manufacturing methods, and observed biological response, as well as the requirements for an ideal surgical mesh and potential manufacturing methods.

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Section: Future Perspectivesmentioning

confidence: 99%

Past, Present and Future of Surgical Meshes: A Review

et al. 2017

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“…These results are significant in the context of comparison to electrospun PP fibers with a reported modulus on the order of 20 MPa as a non-woven and up to 170 MPa as a single fiber, compared to a modulus of 2160 MPa for the extruded HDPE/PP fiber mat at DR 11. [49] The lowest modulus fiber mats produced via melt coextrusion still have a modulus 650% higher than an equivalent electrospun mat, which can be attributed to the improved crystallization achieved by melt processing. The crystallinity achieved in electrospun fibers is limited by the rate of nucleation and growth compared to the rate of solvent evaporation in electrospinning and cannot be improved via drawing and orientation; for the electrospun PP fibers, higher boiling point solvents were shown to increase crystallinity and enhance mechanics.…”

Section: Fiber Mat Characterizationmentioning

confidence: 99%

Mechanically tunable dual-component polyolefin fiber mats via two-dimensional multilayer coextrusion

Lenart

Jang

Jordan

et al. 2016

Polymer

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Recently developed two-dimensional multilayer coextrusion and post-process drawing were combined to fabricate polyolefin composites with independently tunable size (9 width x 3 thickness µm to 5 width x 0.9 thickness µm) and mechanics (e.g. modulus from 1340 to 2010 MPa). Post-process drawing of the composite, studied via in situ synchrotron WAXS and SAXS, imparted higher crystallinity and more uniform and aligned crystallites (fH,PP = 0.93 and fH,HDPE = 0.90) resulting in an improved modulus, while also increasing and narrowing the melting temperature. After drawing, the composites were simultaneously delaminated and consolidated using a high pressure water jet to produce dual-component fiber mats with high specific surface area, which was related to the fiber size and rectangular cross-section unique to this process. The tunability of the HDPE and PP fibers produced via this process hold unique advantages over solvent-based techniques, such as electrospinning, for many high performance applications. INTRODUCTION Commodity polyolefins, such as polyethylene and polypropylene, occupy a dominate position in today's plastics market with polyethylene alone capturing a market share of 34.8% in the US during 2014. [1] These polymers enjoy their market position because of their remarkable diversity of applications and properties derived from the methods used to synthesize and process the materials. [2] Applications for polyolefins range from food packaging to complex biomedical devices. Additionally, these polymer feedstocks are extremely cheap, making them ideal for a variety of disposable applications and rapid market penetration. Polyethylene is one of the most versatile polymers on the market, which, depending on the chain structure and molecular weight, can be used to make products such as grocery bags, filters, milk jugs, and orthopedic implants. Polypropylene, being more rigid and thermally resistant, fills many of the needs polyethylene products alone cannot, such as carpeting or battery separators. Until recently, it has been extraordinarily challenging to process these materials into ultrafine fibers, a size scale necessary for a variety of high performance applications, most prominently ultrafiltration. These applications require non-wovens with extremely small fiber sizes to reduce pore size, and, in the case of air filtration, the higher surface area drastically improves particle loading. [3-5] Current melt-based polyolefin fiber processing techniques, such as melt blowing, typically have a minimum fiber size of one to two microns. [6-9] If the polymer is too viscous, the melt strength limits the fiber size and material selection.

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“…Due to the high solvent resistance of the polymer, there is only a small selection of solvents that allow further processing, some of them allow dissolution only at elevated temperatures. Nevertheless, there are some studies on processability and fiber analysis of polypropylene fibers spun by solvent electrospinning (14)(15)(16)(17). A study by Cho et al compares the solution and melt electrospinning of polypropylene.…”

Section: Introductionmentioning

confidence: 99%

Revealing key parameters to minimize the diameter of polypropylene fibers produced in the melt electrospinning process

et al. 2019

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This study deals with the subject of optimizing the melt electrospinning process of polypropylene with the aim of producing nanoscale fibers. A feasibility study with two polypropylene types and different additives to adapt the material composition is performed. The polypropylene types are of different molar masses to adapt the viscosity to the process. The used additives, sodium stearate and Irgastat® P 16, have a positive effect on the electrical conductivity of the polymer melt. In addition, process parameter optimization is done by varying the climate chamber temperature, using different collector voltages and varying the nozzle-collector distance. A strong influence of the climate chamber temperature has been proven and leads to a desired temperature of 100°C. The fiber diameter is dependent on process parameters, material melt viscosity and electrical conductivity. With optimized process and material parameters, the fiber diameter could be minimized to a median value of 210 nm.

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Effect of organic solvent on morphology and mechanical properties of electrospun syndiotactic polypropylene nanofibers

Cited by 19 publications

References 16 publications

Past, Present and Future of Surgical Meshes: A Review

Past, Present and Future of Surgical Meshes: A Review

Mechanically tunable dual-component polyolefin fiber mats via two-dimensional multilayer coextrusion

Revealing key parameters to minimize the diameter of polypropylene fibers produced in the melt electrospinning process

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