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Electrostatic spinning process for preparing sulfonated polymer elastomer nanofiber membrane

An electrospinning process, a polymer elastomer technology, applied in the chemical characteristics of fibers, single-component synthetic polymer rayon, textiles and papermaking, etc., can solve the problems of poor film air permeability and small adjustable range of microstructure, etc. Achieving the effects of good dimensional stability, wide adjustable range of morphology and excellent mechanical properties

Pending Publication Date: 2022-07-29
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the membrane material prepared by this method has a granular structure of about 1 μm, which leads to poor air permeability of the membrane, and the air permeability of the membrane is only 50 mm s -1 Moreover, the microstructure of the membrane material prepared by this method can be adjusted in a small range, and the application scenarios have certain limitations.

Method used

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  • Electrostatic spinning process for preparing sulfonated polymer elastomer nanofiber membrane
  • Electrostatic spinning process for preparing sulfonated polymer elastomer nanofiber membrane
  • Electrostatic spinning process for preparing sulfonated polymer elastomer nanofiber membrane

Examples

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Effect test

preparation example Construction

[0025] The preparation method of sulfonated SEBS is as follows:

[0026] (1) Preparation of sulfonation reagent

[0027] First, acetic anhydride and 1,2-dichloroethane were mixed, and concentrated sulfuric acid was added dropwise with stirring in an ice-water bath, then stirred in an ice-water bath for 30 minutes, and then vigorously stirred at room temperature for 10 minutes to obtain a sulfonated reagent. During the operation, the molar ratio of acetic anhydride and concentrated sulfuric acid was controlled to be 1.5:1, and the volume ratio of acetic anhydride to 1,2-dichloroethane was 1:15.

[0028] (2) Preparation of sulfonated SEBS

[0029] Get 5g SEBS and add 150mL mixed solvent of 1.2-dichloroethane and cyclohexane (wherein the volume ratio of 1.2-dichloroethane and cyclohexane is 5:1), stir and dissolve at 50 ℃ to obtain SEBS solution, Then, the above-mentioned sulfonating reagent was added dropwise to the SEBS solution, reacted at 50°C for 5 hours, isopropanol was a...

Embodiment 1-15

[0033] Examples 1-15: Electrospinning Process for Preparation of Sulfonated SEBS Nanofibrous Membranes

[0034] (1) according to table 2, take by weighing sulfonated SEBS and be dissolved in solvent and be made into the spinning solution of corresponding concentration;

[0035] (2) electrospinning the spinning solution to obtain a nanofiber membrane, and the electrospinning process parameters are shown in Table 2;

[0036] (3) The sulfonated SEBS nanofiber membrane is obtained after the nanofiber membrane is vacuum-dried.

[0037] Table 2. Sulfonated SEBS nanofiber membranes under different formulations and electrospinning processes

[0038]

[0039]

[0040] The beneficial effects of the present invention are demonstrated below through experimental examples.

experiment example 1

[0041] Experimental Example 1: Performance characterization of the sulfonated SEBS nanofiber membrane obtained in the present invention

[0042] 1. Test sample

[0043] Sulfonated SEBS nanofiber membranes prepared in Examples 1-15.

[0044] 2. Experimental method

[0045] Air permeability test method: refer to GB / T1038-2000;

[0046] Tensile strength test method: refer to GB3923.1-2013.

[0047] 3. Experimental results

[0048] Table 3. Performance characterization results of each sulfonated SEBS nanofiber membrane

[0049] Example Air permeability (mm s -1 )

Tensile strength (MPa) 1 167 2.97 2 158 3.27 3 160 3.37 4 148 3.12 5 159 2.87 6 197 4.67 7 193 4.76 8 225 5.14 9 198 4.98 10 200 4.86 11 204 4.79 12 206 4.74 13 197 4.89 14 208 4.96 15 210 5.02

[0050] It can be seen that the air permeability of the sulfonated SEBS nanofiber membranes prepared in Examples 1...

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Abstract

The invention provides an electrostatic spinning process for preparing a sulfonated polymer elastomer nanofiber membrane, and belongs to the field of polymer membranes. The process comprises the following steps: (1) dissolving a sulfonated polymer elastomer in an organic solvent to prepare a spinning solution with the concentration of 3wt.%-7wt.%; the sulfonation degree of the sulfonated polymer elastomer is 5%-20%; and (2) carrying out electrostatic spinning on the spinning solution, and drying to obtain the nanofiber membrane. The sulfonated SEBS nanofiber membrane prepared by utilizing the electrostatic spinning process is good in air permeability, excellent in mechanical property, large in shape adjustable range, large in specific surface area, large in length-diameter ratio, high in contact efficiency and good in dimensional stability, and has wide application prospects in preparation of medical protective materials, energy materials and filtering materials. The electrostatic spinning process is simple and easy to operate, low in cost and suitable for industrial expanded production.

Description

technical field [0001] The invention belongs to the field of polymer membranes, and in particular relates to an electrospinning process for preparing a sulfonated polymer elastomer nanofiber membrane. Background technique [0002] Hydrogenated polystyrene-butadiene-styrene triblock copolymer (SEBS) is a thermoplastic styrene-butadiene-styrene block copolymer (SBS) molecule in the rubber segment of the polybutadiene unsaturated double bond. Select the modified thermoplastic elastomer produced by hydrogenation. Compared with SBS, SEBS has excellent aging resistance, heat resistance, ozone resistance, oxidation resistance, weather resistance and stability. SEBS can be used as coatings, adhesives, impact modifiers, lubricating tackifiers, fillers and sheaths for wires and cables, etc. Conductive materials compounded with SEBS can be used as stretchable conductive materials, flexible shielding materials and flexible shielding materials. Tensile corrosion resistant material. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4291D04H1/728D01F6/28
CPCD04H1/4291D04H1/728D01F6/28
Inventor 张爱民曾秋娟王超陆星远
Owner SICHUAN UNIV
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