Ultraviolet resisting PBO fibre and preparing method thereof

A UV-resistant and fiber-resistant technology, applied in the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems of insufficient compressive strength, insufficient torsional modulus, limited application of PBO fibers, poor UV light stability, etc. UV resistance, improved photostability, improved photostability

Active Publication Date: 2008-07-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the PBO fiber is not perfect, and its compressive strength, torsional modulus, etc. are still insufficient; especially its ultraviolet light stability is poor, if it is reported that the tensile strength of the PBO fiber has decreased after 450 hours of ultraviolet light irradiation 98% (E.Orndoff, Technical Memorandum 104814, NASA, LyndonB.Johnson space center, Texas, 1995), also reported Zylon  The fiber lost 80% of its tensile strength after 100 hours of ultraviolet light irradiation, and the strength loss reached 85% after 130 hours (M.A.Said et al.Advances in Space Research, 2006, 37:2056), which greatly affects or limits The application of PBO fiber in the field of advanced composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Polymerization and spinning are carried out using the method described in Comparative Example 1, except that after the HCl is completely removed, 0.3787g of rutile nano-TiO is added to the polymerization system 2 And pre-dispersed nano-TiO 2 / PPA solution 50g to make nano TiO 2 The added amount accounts for 0.3% of the polymer mass. During the spinning process, the winding speed can reach up to 55m / min, and the obtained fiber fineness is 4.5dtex, the tensile strength is 3.91GPa, and the elongation at break is 5.1%.

[0023] After the PBO fiber was irradiated with ultraviolet light for 100 hours, the strength retention rate was 75%.

Embodiment 2

[0025] Polymerization and spinning are carried out using the method described in Comparative Example 1, except that after the HCl is completely removed, 1.8935g of rutile nano-TiO is added to the polymerization system 2 And pre-dispersed nano-TiO 2 / PPA solution 100g to make nano TiO 2 The added amount accounts for 1.5% of the polymer mass. During the spinning process, the winding speed can reach up to 75m / min, and the obtained fiber fineness is 4.1dtex, the tensile strength is 4.62GPa, and the elongation at break is 5.2%.

[0026] After the PBO fiber was irradiated with ultraviolet light for 100 hours, the strength retention rate was 71%.

Embodiment 3

[0028] Polymerization and spinning were carried out using the method described in Comparative Example 1, except that after the HCl was completely removed, 3.7869g of rutile nano-TiO was added to the polymerization system. 2 And pre-dispersed nano-TiO 2 / PPA solution 100g to make nano TiO 2 The added amount accounts for 3% of the polymer mass. During the spinning process, the winding speed can reach up to 55m / min, and the obtained fiber fineness is 4dtex, the tensile strength is 3.67GPa, and the elongation at break is 5.4%.

[0029] After the PBO fiber was irradiated with ultraviolet light for 100 hours, the strength retention rate was 62%.

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Abstract

The invention provides PBO fiber which is anti-ultraviolet and a process for preparation, the process for preparation comprises following steps, heating and dissolving 4, 6-diaminoresorcinol dihydrochloride, terephthalic acid, phosphoric acid anhydride and polyphosphoric acids, reacting for 5-7 hours under 0.2-1.0 MPa and the temperature of 110-120 DEG C, removing pressure in an autoclave, removing HCL which is generated in the reaction process, then adding mixture of polyphosphoric acids and nanometer TiO2, reacting for 6-7 hours in vacuum under the temperature of 140-150 DEG C and 20-100 Pa, and then preparing PBO fiber which is anti-ultraviolet. The invention obtains composite material through in-situ polymerization, can improve ultra-violet resistance of PBO fiber and flow property of spinning liquid, therefore, coiling speed is increased, and mechanical property of fiber is further improved.

Description

Technical field [0001] The invention relates to a PBO fiber, in particular to an ultraviolet-resistant PBO fiber. Background technique [0002] Poly(p-phenylene benzodioxazole) fiber (referred to as PBO fiber, the same below) is one of the most excellent high-performance fibers in the field of high-performance fibers at present. It has excellent mechanical properties, heat resistance and flame retardant properties. , Solvent resistance, etc. Such as PBO fiber "Zylon  "As an example, its tensile strength is 5.8GPa, and its tensile modulus is 300GPa, which are twice that of PPTA fiber. Zylon also has excellent thermal stability (thermal decomposition temperature up to 650℃) and flame retardancy (LOI= 68). PBO fiber has very broad application prospects and important application value in aerospace, protective materials, national defense and military, sports equipment, etc., and has an irreplaceable role for other materials. However, PBO fiber is not perfect, its compressive strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10
Inventor 金俊弘杨胜林李光朱慧君江建明
Owner DONGHUA UNIV
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