Sepiolite nano flame-retardant fiber as well as preparation method thereof and flame-retardant composite material using same for strengthening and toughening

A sepiolite fiber and nano-flame retardant technology, which is applied in the field of sepiolite nanofiber and halogen-free flame-retardant composite materials, and flame-retardant composite materials, can solve problems such as poor strength and toughness, and achieve increased strength and toughness, and reduced The amount of flame retardant and the effect of improving flame retardant efficiency

Inactive Publication Date: 2012-02-01
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In addition, regarding the polymer / sepiolite flame-retardant composite material, CN101368000A discloses a sepiolite-based polymer flame-retardant material, which is directly blended with resin such as sepiolite, ammonium polyphosphate, pentaerythritol and melamine Obtained, although it has good flame retardant effect and low smoke production, its strength and toughness are poor

Method used

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  • Sepiolite nano flame-retardant fiber as well as preparation method thereof and flame-retardant composite material using same for strengthening and toughening
  • Sepiolite nano flame-retardant fiber as well as preparation method thereof and flame-retardant composite material using same for strengthening and toughening
  • Sepiolite nano flame-retardant fiber as well as preparation method thereof and flame-retardant composite material using same for strengthening and toughening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] What this embodiment prepares is sepiolite flame-retardant nanofiber PSPHD-SEP, specific steps and conditions are:

[0045] (1) Putting the sepiolite fiber bundles into a hydrochloric acid solution with a mass concentration of 4%, stirring and acidifying at a temperature of 70°C for 10 hours, the mass ratio of the sepiolite fiber bundles to the hydrochloric acid solution was 1:40;

[0046] (2) Put the sepiolite fiber bundles after the acidification treatment into water, and stir them for 7 hours at a pressure of 2 MPa and a temperature of 150° C. to obtain preliminarily dispersed sepiolite fibers. The mass ratio of sepiolite fiber bundles to water is 1:140;

[0047] (3) Add the surfactant cetyltrimethylammonium bromide and octadecyltrimethylammonium bromide (mass ratio 1:1) into water for stirring and activation, and then the initially dispersed seafoam Put the stone fiber into it, and under the action of ultrasonic waves, treat it at a temperature of 50°C for 3 hours,...

Embodiment 2

[0051] What this embodiment prepares is sepiolite flame-retardant nanofiber PSPMPD-SEP, and specific steps and conditions are:

[0052] (1) Putting the sepiolite fiber bundles into a sulfuric acid solution with a mass concentration of 3%, stirring and acidifying at a temperature of 50°C for 5 hours, the mass ratio of the sepiolite fiber bundles to the sulfuric acid solution was 1:25;

[0053] (2) Put the sepiolite fiber bundles after the acidification treatment into water, and stir them for 10 hours at a pressure of 3MPa and a temperature of 120° C. to obtain preliminarily dispersed sepiolite fibers. The mass ratio of the sepiolite fiber bundles to water is 1:200;

[0054] (3) Add the surfactant cetyltrimethylammonium bromide and sodium dodecylbenzenesulfonate (mass ratio 2:1) into water for stirring and activation, and then the initially dispersed sepiolite fiber Put it into it, under the action of ultrasonic waves, treat it at a temperature of 60° C. for 10 hours, filter it...

Embodiment 3

[0058] What this embodiment prepares is sepiolite flame-retardant nanofiber PSPHQ-SEP, and specific steps and conditions are:

[0059] (1) Putting the sepiolite fiber bundles into a hydrochloric acid solution with a mass concentration of 8%, stirring and acidifying at a temperature of 100° C. for 16 hours, the mass ratio of the sepiolite fiber bundles to the hydrochloric acid solution was 1:50;

[0060] (2) Put the sepiolite fiber bundles after the acidification treatment into water, and stir them for 3 hours at a pressure of 1 MPa and a temperature of 180° C. to obtain preliminarily dispersed sepiolite fibers. The mass ratio of the sepiolite fiber bundles to water is 1:100;

[0061] (3) Add surfactants octadecyl trimethyl ammonium bromide and dodecyl dimethyl benzyl ammonium chloride (mass ratio 1:3) into water for stirring and activation, and then preliminarily disperse Put the sepiolite fiber into it, and under the action of ultrasonic waves, treat it at a temperature of 2...

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Abstract

The invention discloses a sepiolite nano flame-retardant fiber with the diameter of 10-60 nanometers, wherein the mass ratio of sepiolite nano fibers to bis-spironaphthoxazine group expanding type flame-retardant polymers is 1: 0.1-0.5; Si-O stretching vibration peaks between 900 cm<-1> and 1000 cm<-1> in an infrared spectrogram are obviously strengthened, and Si-O-Si stretching vibration peaks between 1000 cm<-1> and 1100 cm<-1> are obviously weakened. The invention also discloses a method for preparing the sepiolite nano flame-retardant fiber and a flame-retardant composite material using the same for strengthening and toughening. The invention improves the compatibility of the sepiolite nano flame-retardant fiber in a polymer base material by organically combining the sepiolite nano flame-retardant fiber with a polymeric type expansion flame-retardant agent together through grafting, thereby not only being beneficial to the uniform dispersion of the expanding type flame-retardant agent in the polymer base material, sufficiently playing the synergistic flame-retardant role between the expanding type flame-retardant agent and the polymer base material and enhancing the flame-retardant efficiency, but also playing a role of enhancing the strength and the toughness of polymer materials.

Description

technical field [0001] The invention belongs to the technical field of sepiolite nanofibers and halogen-free flame-retardant composite materials, and specifically relates to an inorganic mineral sepiolite nano-flame-retardant fiber, a preparation method thereof, and a reinforced and toughened flame-retardant composite material. Background technique [0002] At present, although polymer materials have been widely used in various industrial materials, electrical and electronic, wire and cable, auto parts, packaging materials and other fields, most polymer materials are flammable, which makes them unable to be used in Occasions where flame retardancy is required for materials. [0003] In response to this problem, people began to carry out various flame retardant modifications on polymer materials, the most common of which is to add flame retardants, such as adding halogen flame retardants or a large amount of metal hydroxides. However, halogen-containing additive flame retard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C25/66C08L101/00C08K13/06C08K9/04C08K7/10C08K3/32
Inventor 胡小平王玉忠王德义汪秀丽李少先李晓燕刘云
Owner SOUTHWEAT UNIV OF SCI & TECH
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