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Preparation method of HNTs, method used for preparing high polymer/HNTs mixed solution from HNTs, and method used for preparing high polymer nanofiber from high polymer/HNTs mixed solution

A mixed liquid and high polymer technology, applied in the polymer field, can solve the problems of poor polymer compatibility, poor dispersion, and limited application range, etc., achieve good thermal stability and acid-base stability, and enhance mechanical properties , Improve the effect of dispersion

Active Publication Date: 2016-05-25
YANGZHOU SPED CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its poor dispersibility, easy carbonization at high temperature, poor compatibility with polymers, high preparation cost, and complicated preparation process, its application range is greatly limited.

Method used

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  • Preparation method of HNTs, method used for preparing high polymer/HNTs mixed solution from HNTs, and method used for preparing high polymer nanofiber from high polymer/HNTs mixed solution
  • Preparation method of HNTs, method used for preparing high polymer/HNTs mixed solution from HNTs, and method used for preparing high polymer nanofiber from high polymer/HNTs mixed solution
  • Preparation method of HNTs, method used for preparing high polymer/HNTs mixed solution from HNTs, and method used for preparing high polymer nanofiber from high polymer/HNTs mixed solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 90g of HNTs powder calcined at 500°C and sieved at 500 mesh, 1g of modified sulfonate wetting agent and 9g of polycarboxylate dispersant in a sand mill, add 360g of water, and the speed of the sand mill is 1460r / min, sand mill for 2h to form a suspension dispersion of 20-30nm. Dehydration and granulation were carried out by using two-fluid spray drying equipment, with an inlet temperature of 170°C, an outlet temperature of 80°C, and a pressure of 0.3MPa to obtain surface-modified HNTs powder.

[0024] Weigh 4g of PVA and dissolve it in 36g of water to prepare a 10% PVA aqueous solution. After the PVA is completely dissolved, add 10% of modified HNTs (relative to the mass fraction of the PVA aqueous solution), and stir for 2 hours until the dispersion is uniform. Put the PVA / HNT mixture in a disposable syringe, set up the electrospinning device, adjust the voltage to 12kv, push the speed to 0.2mm / min, start electrospinning, and obtain polymer / HNTs composite fibers...

Embodiment 2

[0026] Weigh 90g of HNTs powder calcined at 450°C and sieved at 600 mesh, 1g of modified sulfonate wetting agent and 9g of polycarboxylate dispersant in a sand mill, add DMF300g, and the speed of the sand mill is 800r / min, sand mill for 2h to form a suspension dispersion of 20-30nm. Dehydration and granulation were carried out by using two-fluid spray drying equipment, with an inlet temperature of 170°C, an outlet temperature of 80°C, and a pressure of 0.3MPa to obtain surface-modified HNTs powder.

[0027] Weigh 5g of PMMA and dissolve it in 15g of water to prepare a 25% PMMA-DMF solution. After the PMMA is completely dissolved, add 15% of modified HNTs (relative to the mass fraction of the PMMA-DMF solution), and stir for 2 hours until the dispersion is uniform. Put the PMMA / HNTs mixture in a disposable syringe, set up the electrospinning device, adjust the voltage to 19kv, and the driving speed to 0.3mm / min, start electrospinning, and obtain PMMA / HNTs composite fibers afte...

Embodiment 3

[0029] Weigh 80g of HNTs powder that has been roasted at 800°C and sieved with 600 mesh, 2g of naphthalenesulfonate wetting agent and 10g of polycarboxylate dispersant in a sand mill, add 300g of water, and the speed of the sand mill is 2000r / min , Sand milled for 2h to form a suspension dispersion of 20-30nm. Dehydration and granulation were carried out using a two-fluid spray drying equipment, with an inlet temperature of 180°C, an outlet temperature of 70°C, and a pressure of 0.25MPa to obtain surface-modified HNTs powder. The HNTs powder was further modified with a coupling agent to obtain HNTs powder with hydrophobic surface.

[0030] Weigh 5g of PAN and dissolve it in 35g of DMF to prepare a 12.5% ​​PAN solution. After the PAN is completely dissolved, add 10% of modified HNTs (relative to the mass fraction of the PAN solution), and stir for 2 hours until the dispersion is uniform. Put the PAN / HNTs mixture in a disposable syringe, set up the electrospinning device, adjus...

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Abstract

The invention relates to a preparation method of HNTs, a method used for preparing a high polymer / HNTs mixed solution from HNTs, and a method used for preparing polymer nanofiber from the high polymer / HNTs mixed solution. HNTs is subjected to surface modification so as to solve an intermiscibility problem of HNTs with a high polymer substrate; and electrostatic spinning is used for improving orientation of HNTs nanotubes in the high polymer, and improving fiber mechanical properties.

Description

technical field [0001] The invention belongs to the field of macromolecules, and designs a method for preparing modified HNTs, a method for preparing a high polymer / HNTs mixed liquid by using the modified HNTs, and a method for preparing high polymer nanofibers by using the mixed liquid. Background technique [0002] Nanofibers, as the current scientific frontier and research hotspot, have many applications and advantages, such as the porous structure on the surface, large specific surface area, high aspect ratio and strong penetration, and are widely used in biological , medicine, synthetic fiber reinforced compound and so on. [0003] Electrospinning is a commonly used and effective method for preparing nanofibers. At present, hundreds of polymer solutions or melts have been successfully electrospun into nanofibers. Electrospinning has two notable features, one is the use of electric field force drafting, and the other is that the spun fibers are fine (diameter 50-1000nm)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/14D01F6/22D01F6/18D01F6/16C09C1/40C09C3/10C09C3/08D01D5/00
Inventor 程志林秦茜茜秦敦忠
Owner YANGZHOU SPED CHEM
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