Poly(p-phenylene benzobisoxazole) composite fiber containing nano-TiO2 preparation method

A nano-titanium dioxide, phenylene benzene technology, applied in the direction of fiber processing, fiber chemical characteristics, single-component synthetic polymer rayon, etc., to achieve the effect of excellent anti-ultraviolet aging performance

Inactive Publication Date: 2009-12-30
EAST CHINA UNIV OF SCI & TECH
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] 1 part by mass of nano-titanium dioxide (TiO 2 ) Dispersed in 200 parts by mass of 85% phosphoric acid (H 3 PO 4 ), 170~310 parts by mass of phosphorus pentoxide (P 2 O 5 ), so that the mass fraction of phosphorus pentoxide in the solution is 80-85%, and then stir to prepare a nano-titanium dioxide dispersion.

[0029] The PBO prepolymer solution was prepared using the method described in the comparative example.

[0030] The PBO prepolymer solution and nano-titanium dioxide dispersion were pumped into a twin-screw extruder with a length-to-diameter ratio of 32 and an inner diameter of 21.7 mm with a hydraulic pump. The rotation speed of the metering pump was controlled to enable the delivery of the PBO prepolymer solution. 20g / min, nano titanium dioxide dispersion (TiO 2 / PA) The conveying capacity is 140g / min; the shearing force in the extruder is 500S -1 、The temperature is between 180~210℃ and the residence time is about 30 minutes. After the material...

Example Embodiment

[0031] Example 2

[0032] Polymerization and spinning were carried out using the method described in Example 1, except that the delivery rate of the nanometer titanium dioxide solution into the twin-screw extruder was 90g / min; the PBO composite fiber with the nanometer titanium dioxide content of 7wt.% was obtained. The average diameter is 32μm, and the tensile strength is 2.3GPa. After being exposed to ultraviolet light for 100 hours, its strength retention rate is 61%.

Example Embodiment

[0033] Example 3

[0034] Polymerization and spinning were carried out using the method described in Example 1, except that the transport volume of the nano-titanium dioxide solution into the twin-screw extruder was 50g / min; the PBO composite fiber with the nano-titanium dioxide content of 4wt.% was obtained. The average diameter is 29μm, and the tensile strength is 2.6GPa. After being exposed to ultraviolet light for 100 hours, its strength retention rate is 71%.

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
Intrinsic viscosityaaaaaaaaaa
Intrinsic viscosityaaaaaaaaaa
The average diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a poly(p-phenylene benzobisoxazole) (PBO) composite fiber containing nano-TiO2 preparation method, comprising the following steps: dissolving 4,6-diaminoresorcinol hydrochloride and terephthalic acid and a certain number of phosphorus pentoxide in equal molar ratio in polyphosphoric acid, removing hydrogen chloride gas, heating and polymerizing to obtain poly(p-phenylene benzobisoxazole), then adding poly(p-phenylene benzobisoxazole) and phosphoric acid solution containing nano-TiO2 in a double-screw extruder and obtaining PBO composite fiber containing nano-TiO2 by dry-jet wet spinning; the invention uses nano-TiO2 particles with ultraviolet shielding property and utilizes the strong shearing and high effective blending of the double-screw extruder to prepare the composite fiber; compared with pure PBO fiber, the ultraviolet aging resistance property is effectively improved while the mechanical properties are not reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of compound synthesis and preparation thereof, in particular to a preparation method of poly-p-phenylene benzobisoxazole composite fiber containing nano-titanium dioxide. 【Background technique】 [0002] Poly-p-phenylene benzobisthiazole (PBO) is a lyotropic liquid crystal polymer with excellent characteristics of high strength, high modulus, high temperature resistance and good environmental stability. Its performance is better than the famous Kevlar fiber, and it is regarded as a new generation of reinforcement fiber for advanced structural composite materials in the fields of aviation, aerospace, national defense, and planetary exploration. [0003] However, according to "Dow Chemical" and "Toyobo" reports, the mechanical strength of PBO fiber will be greatly reduced under the irradiation of ultraviolet-visible light. Peter J.Walsh and others found that PBO fiber is 750W / m 2 After 150 hours and 270 hou...

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): D01F6/94D01F1/10C08G73/22C08K3/22D01D5/06D01D1/00D01D1/06
Inventor 庄启昕谢众毛晓阳李欣欣钱军刘小云韩哲文
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap