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Method for enhancing ultraviolet resistance stability of PBO (poly-p-phenylenebenzobisthiazole) fibers by depositing (POSS (polyhedral oligomeric silsesquioxane)/TiO2)n films on surfaces

A technology of surface deposition and UV resistance, which is applied in fiber treatment, fiber type, textile and papermaking, etc., can solve the problems of PBO fiber characteristic viscosity reduction, PBO fiber molecular chain break, fiber molecular weight and orientation degree reduction, etc.

Active Publication Date: 2013-12-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a surface deposition (POSS / TiO 2 ) n Method for Film Reinforced PBO Fiber Anti-ultraviolet Light Stability

Method used

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  • Method for enhancing ultraviolet resistance stability of PBO (poly-p-phenylenebenzobisthiazole) fibers by depositing (POSS (polyhedral oligomeric silsesquioxane)/TiO2)n films on surfaces
  • Method for enhancing ultraviolet resistance stability of PBO (poly-p-phenylenebenzobisthiazole) fibers by depositing (POSS (polyhedral oligomeric silsesquioxane)/TiO2)n films on surfaces
  • Method for enhancing ultraviolet resistance stability of PBO (poly-p-phenylenebenzobisthiazole) fibers by depositing (POSS (polyhedral oligomeric silsesquioxane)/TiO2)n films on surfaces

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Experimental program
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specific Embodiment approach 1

[0015] Specific embodiment one: in this embodiment, surface deposition (POSS / TiO 2 ) n The method of film-enhanced PBO fiber UV stability is as follows:

[0016] 1. Oxygen plasma modification on the surface of PBO fiber: place the PBO fiber in a plasma surface treatment instrument, and treat it for 5-20 minutes under the condition of a voltage of 100-200V in an oxygen atmosphere with a vacuum degree of 0.1mbar;

[0017] 2. Grafting aminophenyl POSS on the surface: immerse the PBO fiber treated in step 1 in a tetrahydrofuran solution with a mass concentration of 0.1-1% aminophenyl POSS, and then react at 60-100°C for 1-4 hours;

[0018] 3. Preparation of titanium dioxide sol solution: dissolve titanium tetrachloride in dehydrated alcohol to make a dehydrated ethanol solution of titanium tetrachloride with a mass concentration of 0.1 to 1%, and dissolve the dehydrated ethanol solution of titanium tetrachloride Drop into the dehydrated ethanol solution of tetrabutylammonium hyd...

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the voltage is 110-190V. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, the voltage is 120-180V. Others are the same as in the first embodiment.

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Abstract

The invention provides a method for enhancing ultraviolet resistance stability of PBO (poly-p-phenylenebenzobisthiazole) fibers by depositing (POSS (polyhedral oligomeric silsesquioxane) / TiO2)n films on the surfaces, relating to a method for enhancing ultraviolet resistance stability of PBO fibers. The technical problem that the intrinsic viscosity and mechanical properties of the PBO fibers are reduced because ultraviolet irradiation causes PBO fiber molecular chain breaking and fiber molecular weight and orientation degree reduction is solved by adopting the method. The method comprises the following steps of: I. carrying out oxygen plasma modification on the surfaces of the PBO fibers; II. grafting aminophenyl POSS on the surfaces; III. preparing a TiO2 sol solution; IV. carrying out alternate deposition; and V. repeating the step IV n times to obtain (POSS / TiO2)n films on the surfaces of the PBO fibers. The method has the following beneficial effects that PBO fiber molecular weight and orientation degree reduction are not obvious after the PBO fibers treated by the method are subjected to accelerated aging by ultraviolet; and the PBO fibers have higher tensile strength retention and intrinsic viscosity retention than the untreated PBO fibers.

Description

technical field [0001] The invention relates to a method for enhancing the stability of PBO fibers against ultraviolet light. Background technique [0002] Poly-p-phenylenebenzobisthiazole (PBO, Poly-p-phenylenebenzobisthiazole) belongs to an aromatic heterocyclic rigid rod-shaped liquid crystal polymer with good chemical properties, flame retardancy, high temperature stability, creep resistance, Chemical and physical abrasion resistance. PBO is a new type of polymer developed according to the principle of molecular structure and performance. Its molecular structure is as follows: [0003] [0004] Its link angle (that is, the angle between the external bonds of the ring on the rigid main chain unit) is 180°, and there are only two single bonds on both sides of the benzene ring in the repeating unit structure, which cannot be rotated internally, so it is a rigid rod molecules capable of forming lyotropic liquid crystals. There are no weak bonds in the molecular structu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/513D06M11/46D06M10/00D06M101/30
Inventor 黄玉东宋波孟令辉吴捷张庆波姜大伟
Owner HARBIN INST OF TECH