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

Copolymerized polyamide capable of producing ferroelectric nylon film by simple thermal processing and preparation method thereof

A technology for copolymerizing polyamide and nylon films, which is applied to the synthesis field of ferroelectric polyamides, can solve the problems of difficulty in large-scale, continuous and rapid preparation of ferroelectric nylon films, and difficulty in obtaining ferroelectric crystals, and achieves easy processing and ferroelectricity. The effect of stable crystal form and adjustable melting point

Active Publication Date: 2021-06-08
SICHUAN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of copolyamide that can be made into ferroelectric nylon film by simple thermal processing and its preparation method, to solve the problem that existing ferroelectric nylon is difficult to obtain ferroelectric crystal phase, and ferroelectric nylon film is difficult to obtain large-scale and continuous , technical issues of rapid preparation

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
  • Copolymerized polyamide capable of producing ferroelectric nylon film by simple thermal processing and preparation method thereof
  • Copolymerized polyamide capable of producing ferroelectric nylon film by simple thermal processing and preparation method thereof
  • Copolymerized polyamide capable of producing ferroelectric nylon film by simple thermal processing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of a ferroelectric nylon film (PA11511-9.1 for short) that can be obtained by simple thermal processing:

[0042] Step 1: Preparation of nylon 511 salt, weigh 54g of undecanedioic acid (about 0.25mol), 25.75g (about 0.25mol) of pentamethylenediamine and 200ml of deionized water in proportion, mix well and pour it into 500ml three wells in the flask. Turn on the stirring device and set the rotational speed to 60 r / min, and introduce nitrogen to replace the air in the three-necked flask. The temperature was raised to 80°C to carry out the salt-forming reaction, and the pH of the system was adjusted to 7.2 by adding a small amount of reactants. The reaction was stopped after 1 hour of normal pressure reaction. The aqueous solution of the obtained nylon 511 salt was subjected to rotary evaporation, and then the product was dried under vacuum at 80° C. for 4 hours to obtain the nylon 511 salt as a white powder, ready for use.

[0043] Step 2: Pre-poly...

Embodiment 2

[0047] A preparation method of a ferroelectric nylon film (PA11511-8.2 for short) that can be obtained by simple thermal processing:

[0048] Step 1: Preparation of nylon 511 salt, weigh 54g of undecanedioic acid (about 0.25mol), 25.75g (about 0.25mol) of pentamethylenediamine and 200ml of deionized water in proportion, mix well and pour it into 500ml three wells in the flask. Turn on the stirring device and set the rotational speed to 60 r / min, and introduce nitrogen to replace the air in the three-necked flask. The temperature was raised to 80°C to carry out the salt-forming reaction, and the pH of the system was adjusted to 7.2 by adding a small amount of reactants. The reaction was stopped after 1 hour of normal pressure reaction. The obtained aqueous solution of nylon 511 salt was subjected to rotary evaporation, and then the product was dried under vacuum at 80° C. for 4 hours to obtain a white powder of nylon 511 salt, which was ready for use.

[0049] Step 2: Pre-po...

Embodiment 3

[0052] A preparation method of a ferroelectric nylon film (PA11511-7.3 for short) that can be obtained by simple thermal processing:

[0053] Step 1: Preparation of nylon 511 salt, weigh 54g of undecanedioic acid (about 0.25mol), 25.75g (about 0.25mol) of pentamethylenediamine and 200ml of deionized water in proportion, mix well and pour it into 500ml three wells in the flask. Turn on the stirring device and set the rotational speed to 60 r / min, and introduce nitrogen to replace the air in the three-necked flask. The temperature was raised to 80°C to carry out the salt-forming reaction, and the pH of the system was adjusted to 7.2 by adding a small amount of reactants. The reaction was stopped after 1 hour of normal pressure reaction. The obtained aqueous solution of nylon 511 salt was subjected to rotary evaporation, and then the product was dried under vacuum at 80° C. for 4 hours to obtain a white powder of nylon 511 salt, which was ready for use.

[0054] Step 2: Pre-po...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The present invention provides a kind of copolyamide and its preparation method which can be obtained by simple thermal processing, and the ferroelectric nylon film mainly includes the preparation of nylon salt, polycondensation reaction and hot pressing or extrusion process in the preparation process. Forming in three steps. In the present invention, by copolymerizing nylon 511 salt formed by monomer aminoundecanoic acid of nylon 11, pentamethylenediamine and undecanedioic acid, its chain regularity is destroyed, crystallization performance is reduced, and hot pressing molding can directly obtain Mesophase structure for electrical properties. The invention can realize the large-scale and rapid preparation of the ferroelectric nylon thin film, and has broad application prospects.

Description

technical field [0001] The invention belongs to the synthesis technology of ferroelectric polyamide, in particular to a copolyamide which can obtain ferroelectric nylon film by simple thermal processing and a preparation method thereof. Background technique [0002] Ferroelectric polymer films are widely used in sensors, piezoelectric actuators, non-volatile memory materials and other fields due to their high breakdown strength, high-voltage electrical sensitivity, light weight, flexibility, and large-scale fabrication. Polyvinylidene fluoride (PVDF) and PVDF-based copolymers are currently the only commercially available ferroelectric polymers. However, poor ferroelectric stability, high toxicity of polymerized monomers, and low cost performance limit the application of PVDF as ferroelectric thin films. [0003] The ferroelectricity of odd-numbered nylons has been reported for nearly 50 years; in recent years, even-numbered nylons have also exhibited electric field-induced ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/36C08J5/18C08L77/00
CPCC08G69/36C08J5/18C08J2377/00
Inventor 蔡绪福黄檑
Owner SICHUAN UNIV
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