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Stock solution for spinning phenolic fibers (PFs) and preparation method for stock solution

A technology for phenolic fiber and spinning stock solution, which is applied to the preparation of a stock solution and the field of preparation thereof, can solve the problems of flame retardancy, thermal insulation performance and strength effect of phenolic fiber, and achieves mild and controllable synthesis conditions, simple operation and good dispersibility. Effect

Active Publication Date: 2013-06-12
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the addition of this polymer cannot greatly affect the flame retardancy, heat insulation performance and strength of the phenolic fiber, which poses a challenge to the preparation of spinning dope with excellent performance

Method used

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  • Stock solution for spinning phenolic fibers (PFs) and preparation method for stock solution
  • Stock solution for spinning phenolic fibers (PFs) and preparation method for stock solution
  • Stock solution for spinning phenolic fibers (PFs) and preparation method for stock solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Put 60g phenol, 210gPVA solution (12wt%) and 5gNaOH into the reactor, raise the temperature to 90°C under stirring at 300r / min, then add 74g formaldehyde solution (30wt%), raise the temperature to 95°C, after 60 minutes of reaction, add 18.5g formaldehyde solution (30 wt%), adjust the temperature to 95°C, react for 100 minutes, and cool to room temperature within 1 minute to obtain a stock solution with a viscosity of 12000mPa.s.

Embodiment 2

[0018] Example 2: Put 60g of phenol, 835g of PVA solution (18wt%) and 4.8g of KOH into the reactor, raise the temperature to 80°C under stirring at 800r / min, then add 44.5g of formaldehyde solution (40wt%), put The temperature was raised to 90°C, after 100 minutes of reaction, 11g of formaldehyde solution (40 wt%) was added, the temperature was adjusted to 92°C, and after another 40 minutes of reaction, it was cooled to room temperature within 5 minutes to obtain a stock solution with a viscosity of 25000mPa.s.

Embodiment 3

[0019] Embodiment 3: 60g phenol, 640gPVA solution (6 wt %) and 20g NH 3 .H 2 Put O into the reactor, raise the temperature to 85°C under stirring at 500r / min, then add 84g of formaldehyde solution (37 wt%), raise the temperature to 96°C, add 36g of formaldehyde solution (37 wt%) after reacting for 40min , adjust the temperature to 100°C, react for 120 minutes and then cool to room temperature within 3 minutes to obtain a stock solution with a viscosity of 10,000 mPa.s.

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Abstract

The invention relates to a stock solution for spinning phenolic fibers (PFs). The stock solution comprises the following raw materials: phenol, a 30 to 40 weight percent formaldehyde solution, a 6 to 18 weight percent polyvinyl alcohol (PVA) solution and a catalyst in a mass ratio of 100:(90-200):(40-250):(8-40). The stock solution has the advantages that: spinnability is high, the spinnable viscosity interval is wide, and the intrinsic properties of the PFs are not influenced by an additive.

Description

technical field [0001] The invention belongs to the preparation of a stock solution and a preparation method thereof, in particular to a high-quality stock solution suitable for solution spinning and electrospinning for spinning phenolic fibers and a preparation method thereof. Background technique [0002] Phenolic fibers (PFs) are fibers with a three-dimensional cross-linked network structure obtained by spinning and curing phenolic resins. The cross-linking degree is greater than 85%, and it is golden yellow. It was born in 1968 when Dr. J. Economy of Corboyundum in the United States was studying aerospace materials. At that time, it was mainly considered that the spacecraft would generate thousands of degrees of high temperature when it re-entered the atmosphere. Phenolic resin can effectively solve this problem, and phenolic fiber was developed under this background, and was rated as one of the top ten inventions of synthetic fiber in the world in 1969. [0003] The sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/10D01F6/94
Inventor 史景利马昌宋燕张东卿郭全贵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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