High temperature melt integrity battery separators via spinning
A spinning, mechanical spinning technique used in the field of high temperature melt integrity battery separators through spinning
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[0185] In the preparation of polyimides and / or polyetherimides, any diamino compound can be used. Illustrative, non-limiting examples of suitable diamino compounds of formula (VII) include: ethylenediamine, propylenediamine, trimethylenediamine, diethylenetriamine, triethylenetetramine, hexamethylene Diamine, heptamethylenediamine, octamethylenediamine, nonanediamine, decanediamine, 1,12-dodecanediamine, 1,18-octadecanediamine, 3-methyl Heptamethylenediamine, 4,4-Dimethylheptamethylenediamine, 4-Methylnonanediamine, 5-Methylnonanediamine, 2,5-Dimethylhexamethylenediamine , 2,5-dimethylheptamethylenediamine, 2,2-dimethylpropylenediamine, N-methyl-bis(3-aminopropyl)amine, 3-methoxyhexamethylenediamine Diamine, 1,2-bis(3-aminopropoxy)ethane, bis(3-aminopropyl)sulfide, 1,4-cyclohexanediamine, bis-(4-aminocyclohexyl)methane, m-phenylenediamine, p-phenylenediamine, 2,4-diaminotoluene, 2,6-diaminotoluene, m-xylylenediamine, p-xylylenediamine, 2-methyl-4,6 -Diethyl-1,3-phenylene-di...
Embodiment
[0194] The following examples are presented in order to provide those of ordinary skill in the art with a complete disclosure and illustration of how the compounds, compositions, articles, devices, and / or methods claimed herein can be made and evaluated, and are intended purely Exemplary and not intended to limit the scope of the methods and systems described. Efforts have been made to ensure accuracy with respect to numbers (eg, amounts, temperature, etc.), but some errors and deviations should be accounted for. Unless indicated otherwise, parts are parts by weight, temperature is in °C or is at ambient temperature, and pressure is at or near atmospheric.
[0195] mechanical spinning
[0196] The present disclosure relates to methods for producing fine fibers from polymers by mechanical spinning methods such as solution shear spinning, force spinning, and the like. Force spinning (including centrifugal spinning and rotary jet spinning) may be a technique in which the drivin...
Embodiment A1
[0229] Example A1: As an example, at a solution viscosity of about 295,000 centipoise (cP), passing through a 1,600 μm (14G) hole diameter at a spinneret speed of 2,000 RPM will produce about 35 wt.% of ULTEM1000 dissolved in NMP The composed solution is spun. This example resulted in fiber diameters between about 1.24 μm and about 35.3 μm, with an average diameter of about 11.4 μm. Figure 13A A representative of the fiber morphology of the examples is shown. Figure 13B A histogram showing the fiber diameter distribution.
[0230] The solution viscosity was measured using a Brookfield Engineering viscometer at a solution temperature of about 24°C.
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Abstract
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