Polymer nonwoven nanoweb having ionic functional group and respirator mask comprising same
A non-woven mesh and polymer technology, applied in the direction of non-woven fabrics, ion exchange, respiratory masks, etc., can solve the problems of performance degradation and achieve the effect of improving electrostatic force, maintaining electrostatic force, and good pressure drop value
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preparation example Construction
[0157] Preparation of such polymeric nonwoven webs can be performed using electrospinning. Specifically, after dissolving one of the polymers in a solvent to prepare a spinning solution, the spinning solution can be placed in a syringe connected to a needle, and an electric field can be applied between the needle and the collector to spin the fibers Electrospin onto the collector. Through this electrospinning, nanofibers having a diameter of 100 nm or more and less than 1000 nm can be randomly entangled to form a nonwoven web.
[0158] In such electrospinning, electrospinning of polymers with ionic functional groups can be somewhat difficult. Therefore, a copolymer of a monomer unit having an ionic functional group and a monomer unit not having an ionic functional group (in formula 1 or 2, n is an integer of 1 or more, in formula 3, the sum of 1 and n is an integer of 1 or greater). In addition, the ratio of monomer units containing ionic functional groups to monomer units ...
Synthetic example 1
[0168] Polymer Synthesis Example 1: Polymer A
[0169] [plan 1]
[0170]
[0171] Methyl methacrylate (MMA), vinylbenzyl chloride (VBC), and styrene were dissolved in toluene, and then a polymerization initiator (benzoyl peroxide) was added thereto. After radical polymerization, the resulting copolymer was precipitated, washed and dried in an oven at 60° C. to obtain an intermediate. Polymer A (number average molecular weight: 200,000 to 300,000, ion exchange capacity: 1.40 meq / g) was obtained by subjecting the copolymer and TMA (trimethylamine) to amine reaction.
[0172] image 3 is the intermediate obtained in Polymer Synthesis Example 1 in CDCl 3 tested in solvent 1 H-NMR (nuclear magnetic resonance) spectrum.
[0173] refer to image 3 , 1 The peaks a to g shown in the H-NMR spectrum confirmed that the intermediate was synthesized.
[0174] Figure 4 It is an FT-IR (Fourier Transform Infrared Spectrum) chart of the polymer A obtained in Polymer Synthesis Examp...
Synthetic example 2
[0176] Polymer Synthesis Example 2: Polymer B
[0177] [Scenario 2]
[0178]
[0179] PPO (polyphenylene ether) was dissolved in chloroform. Chlorosulfonic acid was slowly added dropwise to the PPO solution. Polymer B synthesized by the reaction was obtained by precipitation. Polymer B was washed with deionized water, filtered, and dried in an oven at 60°C for over 24 hours. Number average molecular weight of the obtained polymer B: 50,000 to 60,000, ion exchange capacity: 1.70 meq / g.
[0180] Figure 5 It is tested in DMSO-d6 solvent of polymer B obtained in polymer synthesis example 2 1 H-NMR (nuclear magnetic resonance) spectrum.
[0181] refer to Figure 5 , confirmed by 1 It was confirmed that the polymer B was synthesized by the peak a representing the sulfonic acid group shown in the H-NMR spectrum.
[0182] Figure 6 It is an FT-IR (Fourier Transform Infrared Spectrum) chart of the polymer B obtained in Polymer Synthesis Example 2.
[0183] refer to F...
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