Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Super-branched polyester and preparation method as well as application in high-speed stretch electrostatic spinning thereof

A technology of hyperbranched polyester, spinning solution, applied in the manufacture of rayon, chemical characteristics of fibers, textiles and papermaking, etc., can solve the control without involving the spinning shape, increase the processing temperature, cannot generally improve the spinning phenomenon and other problems, to solve the phenomenon of fiber entanglement and filament doubling, improve the fiber morphology, and reduce the amount of solvent

Active Publication Date: 2010-06-16
EAST CHINA UNIV OF SCI & TECH
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is still a huge challenge to control the uniform working temperature of the entire spinning system and control the instability of solvent volatilization at the outlet of the spinning solution caused by temperature rise.
[0006] 3. Only by increasing the processing temperature can not generally improve the parallel phenomenon of high-speed electrospinning process, and can not effectively suppress the large fluctuation of spinning diameter
Moreover, this application does not involve the application of hyperbranched polyester system in the electrospinning process, nor does it involve its control of the spinning morphology in the electrospinning process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Super-branched polyester and preparation method as well as application in high-speed stretch electrostatic spinning thereof
  • Super-branched polyester and preparation method as well as application in high-speed stretch electrostatic spinning thereof
  • Super-branched polyester and preparation method as well as application in high-speed stretch electrostatic spinning thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Preparation of hyperbranched polymers with acetyl-terminated polymers and their use as electrospinning additives:

[0046]

[0047] Under anhydrous and anaerobic conditions, add 5.0g (2.9mmol) H2O, 0.15g 4-dimethylaminopyridine (DMAP) (3-4% relative to the mass fraction of H20) to the Schlenk bottle in sequence according to a certain stoichiometric ratio. %), 11.2ml (138.7mmol) pyridine as catalyst, and 15ml tetrahydrofuran as solvent, slowly add 10.0ml (138.7mmol) acetyl chloride dropwise to the system using a dropping funnel, and react overnight in an ice-water bath. Add an appropriate amount of 1mol / L dilute HCl dropwise to the crude product to remove unreacted pyridine and DMAP, then extract and separate the liquids with saturated NaCl and ethyl acetate solution three times, take the upper organic phase and wash it with anhydrous MgSO 4 After drying for 2h, the target product was obtained after removing ethyl acetate with a rotary evaporator, and the productive r...

Embodiment 2

[0049] Preparation of hyperbranched polymers with n-octanoyl end groups and their use as electrospinning additives:

[0050] 1) Preparation of n-octanoyl chloride:

[0051]

[0052] Under anhydrous conditions, add 2.2ml (13.9mmol) n-octanoic acid) and 2.0ml (27.8mmol) thionyl chloride to the Schlenk bottle according to a certain stoichiometric ratio, and reflux and condense at 70-75°C under nitrogen protection After 2 hours, the excess thionyl chloride was removed by a rotary evaporator to obtain a light yellow transparent liquid which was n-octanoyl chloride with a yield of 95%.

[0053] 2) Synthesis of n-octanoate of H20

[0054]

[0055] Under anhydrous and anaerobic conditions, add 2.0g (1.2mmol) H2O, 0.06g 4-dimethylaminopyridine (DMAP) (3-4% of %), 4.5ml (56.2mmol) pyridine as catalyst, 15ml tetrahydrofuran as solvent, slowly add 10.0ml (56.2mmol) n-octanoyl chloride dropwise to the system using a dropping funnel, and react overnight in an ice-water bath to obtai...

Embodiment 3

[0059] Synthesis of H20 perfluorooctanoate and its use as spinning additive:

[0060] 1) Synthesis of perfluorooctanoyl chloride:

[0061]

[0062] The preparation of perfluorooctanoyl chloride (PFOC) is to add 10g (0.024mmol) perfluorooctanoic acid, 5.7g (0.048mmol) thionyl chloride and a small amount of DMF (0.5 ml) as a catalyst, obtained by reflux condensation at 70-75°C for 2h under nitrogen protection. The obtained crude product was placed in a separatory funnel and allowed to stand for layers. The upper layer was a yellow liquid, and the lower layer was a white liquid. Remove the layer of white liquid with a strong pungent odor. Afterwards, excess thionyl chloride was removed by a rotary evaporator to obtain a colorless and transparent liquid which was perfluorooctanoyl chloride, with a yield of 97.0%.

[0063] 2) Synthesis of perfluorooctanoate of H20:

[0064]

[0065] Under anhydrous and anaerobic conditions, add 1.0g (0.58mmol) H20, 0.04g4-dimethylaminopyr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a preparation method of super-branched polyester as well as application in high-speed electrostatic spinning thereof. The adopted preparation route is to carry out acyl halogenation or direct esterification on H2O. After the super-branched polyester is applied to a high-speed electrostatic spinning solution, the critical spinning concentration and the spinning quality of the spinning solution are greatly improved, and the problems of winding and stranding in the spinning process are effectively solved.

Description

technical field [0001] The invention relates to a hyperbranched polyester and a preparation method thereof, and the application of the hyperbranched polyester to high-speed stretching electrospinning to improve and enhance the spinning quality. Background technique [0002] Electrospinning technology was proposed by Formhals et al. as early as 1934. In a series of patent applications, he invented an experimental device for preparing polymer fibers by electrostatic force (such as figure 1 ). In 1971, Baumgarten produced polyacrylonitrile fibers using electrospinning technology. So far, the electrospinning method has been able to spin more than 50 different polymers, such as polyester, polyurethane, polyethylene, polypropylene, polyvinyl alcohol, polyaniline, polyacrylonitrile, etc., into diameters ranging from less than Ultrafine fibers ranging from 3nm to more than 1μm, the resulting electrospun fibers are collected on the negative plate and deposited into a non-woven fab...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G63/91C08G63/66C08G63/682D01F1/10
Inventor 景浩胡爱国魏伟
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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