Method for preparing para-aramid pulp by ultrasonic induction
A para-aramid fiber pulp and ultrasonic technology, applied in spinning solution preparation, wet spinning, single-component polyamide rayon, etc., can solve the problems of serious environmental pollution, difficulty in solvent recovery, high investment cost, etc. , to achieve the effect of improving specific surface area, good fiber shape, simple and stable process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0024] in N 2 Under the protective effect of preparation 100mlN-methylpyrrolidone-calcium chloride (NMP-CaCl 2 ) solvent system, wherein the quality of calcium chloride is 8.95g; 3.78g of PPDA powder is added while stirring; after it is completely dissolved, the reaction system is cooled to 5°C with an ice-salt bath, and 7.10g of PPDA powder is added in two times TPC powder, after adding 3.55g of TPC powder for the first time, stir at a high speed at a stirring rate of 500r / min; after 3 minutes, add the remaining 3.55g of TPC powder, turn off the stirring device, and turn on the ultrasonic wave for polycondensation reaction at the same time, the ultrasonic frequency is 78kHz , the reaction time is 1h, obtains pale yellow PPTA slurry; The prepared PPTA slurry is diluted with 50mlNMP, and the slurry is sprayed into the coagulation solution composed of high-speed shear NMP (40ml) and water (10ml), and the stirring rate is 3000r / min, cut for 10 minutes to form chopped fiber-like...
Embodiment 2
[0028] in N 2 Under the protective effect of preparation 100mlN-methylpyrrolidone-calcium chloride (NMP-CaCl 2 ) solvent system, wherein the quality of calcium chloride is 8.95g; 3.78g of PPDA powder is added while stirring; after it is completely dissolved, the reaction system is cooled to 0°C with an ice-salt bath, and 7.10g of PPDA is added in two times TPC powder, after adding 0.71g of TPC powder for the first time, stir at a high speed at a stirring rate of 1000r / min; after 3 minutes, add the remaining 6.39g of TPC powder, turn off the stirring device, and turn on the ultrasonic wave for polycondensation reaction at the same time, the ultrasonic frequency is 78kHz , the reaction time is 1h, obtains pale yellow PPTA slurry; The prepared PPTA slurry is diluted with 50mlNMP, and the slurry is sprayed into the coagulation solution composed of high-speed shear NMP (50ml) and water (10ml), and the stirring speed is 2500r / min, cut for 15 minutes to form chopped fiber-like pulp...
Embodiment 3
[0032] in N 2 Under the protective effect of preparation 100mlN-methylpyrrolidone-calcium chloride (NMP-CaCl 2 ) solvent system, wherein the quality of calcium chloride is 8.95g; 2.70g of PPDA powder is added while stirring; after it is completely dissolved, the reaction system is cooled to -10°C with an ice-salt bath, and 5.08g of PPDA is added in two times After adding 2.54g of TPC powder for the first time, stir at a high speed at a stirring rate of 1500r / min; after 4 minutes, add the remaining 2.54g of TPC powder, turn off the stirring device, and turn on the ultrasonic wave for polycondensation reaction at the same time. The ultrasonic frequency is 68kHz, the reaction time is 0.5h, obtains pale yellow PPTA slurry; The prepared PPTA slurry is diluted with 40mlNMP, and the slurry is sprayed into the coagulation solution composed of high-speed shear NMP (60ml) and water (10ml), stirring speed 2000r / min, cut for 10min to form chopped fiber-like pulp fibers, and after suction...
PUM
Property | Measurement | Unit |
---|---|---|
length | aaaaa | aaaaa |
specific surface area | aaaaa | aaaaa |
length | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com