Method for improving ultraviolet resistance of POB fibers by using bifunctional hyperbranched siloxane

A siloxane and bifunctional technology, which is applied in the field of improving the UV resistance and adhesion of PBO fibers, can solve the problems of poor adhesion of the resin matrix interface, easy to be damaged by light, and low UV resistance of PBO fibers, and achieves low price. , Enhanced UV resistance and improved adhesion

Active Publication Date: 2016-10-12
HARBIN INST OF TECH
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low UV resistance of existing PBO fibers, easy to be damaged by light, and poor interface adhesion wi

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
  • Method for improving ultraviolet resistance of POB fibers by using bifunctional hyperbranched siloxane
  • Method for improving ultraviolet resistance of POB fibers by using bifunctional hyperbranched siloxane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Specific embodiment 1: The method for improving the anti-ultraviolet performance of PBO fiber with hyperbranched siloxane provided in this embodiment is carried out through the following steps:

[0027] 1. PBO fiber pretreatment:

[0028] (1) Use the Soxhlet extractor to extract the PBO fiber first to remove the surface impurities. The specific steps are: wrap a certain quality of PBO fiber wrapped on the glass slide with filter paper, and add it to the Soxhlet extractor. Extraction with acetone for 48h;

[0029] (2) After the extraction is completed, it is washed and dried, and then added to the solution of epichlorohydrin and acetone (the volume ratio of epichlorohydrin to acetone is 1:5), and then the strength is 40kGy -ray radiation treatment, treatment for 30 minutes to obtain pretreated PBO fiber, that is, epichlorohydrin grafted PBO fiber.

[0030] 2. Preparation of bifunctional hyperbranched siloxane:

[0031] (1) Put KH560, KH570 and water into a three-necked flask, an...

Example Embodiment

[0042] Specific embodiment two: this embodiment is different from specific embodiment one in that the mass ratio of KH560, KH570 and water in step two is (KH560+KH570): H2O=1:1.3. Others are the same as the first embodiment.

[0043] The PBO fiber coated with hyperbranched siloxane on the surface obtained in this embodiment and the PBO fiber in step 1 were irradiated under 1000W ultraviolet light for 20s, and then the fiber monofilament pull-out test was performed. The comparison of the two shows that the tensile strength of the PBO fiber precursor in step one is 4.91 GPa, and the tensile strength of the PBO fiber in step one after ultraviolet light irradiation is 4.27 GPa; while the surface is coated with hyperbranched silicone The tensile strength of PBO fiber after ultraviolet light irradiation is 4.73GPa, and the anti-ultraviolet performance has been greatly improved.

Example Embodiment

[0044] Specific embodiment three: this embodiment is different from specific embodiment one or two in that in step two, it is heated to 70° C. and reacted for 4.5 hours. The other steps and parameters are the same as in the first or second embodiment.

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
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for improving the ultraviolet resistance of POB fibers by using bifunctional hyperbranched siloxane. The method comprises the following steps: (1) putting Epoxy chloropropane grafted PBO (poly(p-phenylenebenzobisoxazole)) fibers in a 3-mouth bottle; (2) adding distilled water and a methanol solvent to the 3-mouth bottle to immerse the fibers, and adding a certain amount of NaOH to adjust the pH to 8-10; (3) putting bifunctional hyperbranched siloxane in the 3-mouth bottle at 30-40DEG C; (4) heating the bottle to 60-80DEG C from 30-40DEG C, and continuously stirring above materials for 4-5 h to obtain bifunctional hyperbranched siloxane grafted PBO fibers; and (5) taking out the fibers, cleaning the fibers with a large amount of deionized water and anhydrous ethanol, and carrying out vacuum drying. Grafting combination of the hyperbranched siloxane to the PBO fibers obviously enhances the ultraviolet resistance of the PBO fibers; and a hyperbranched siloxane system has a large amount of active groups, so the PBO can get a good coating layer, and the cohesiveness between the surface and resin is improved.

Description

technical field [0001] The present invention relates to a method for improving the ultraviolet resistance and adhesion of PBO fibers. Background technique [0002] PBO fiber is an aromatic heterocyclic polymer (poly-p-phenylene benzodiimidazole) fiber, which has excellent mechanical properties, thermal properties and good environmental resistance. PBO fiber is considered to be the most promising in the preparation of composite materials. Reinforcement body. The PBO fiber polymer is affected by the spinning process, and the molecular chains are highly oriented and parallel along the fiber axial direction. Therefore, the PBO fiber has a very high degree of crystallinity and axial orientation, which makes the PBO fiber have excellent performance. However, the fatal disadvantage of PBO fiber is its poor UV resistance, and the lack of polar functional groups on the surface leads to poor adhesion, which greatly limits the application of PBO fiber. Contents of the invention [...

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): D06M10/08D06M13/513D06M101/30
CPCD06M10/08D06M13/513D06M2101/30D06M2200/25
Inventor 姜波张奎元黄玉东赵立伟潘海涛祝长城
Owner HARBIN INST OF 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