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Surface modified carbon nanotube and preparation method thereof

A carbon nanotube, surface modification technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of gel, application limitation, silanol instability, etc., to achieve electrical properties Low impact, high flame retardant efficiency, improved flame retardant effect

Inactive Publication Date: 2012-05-09
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this hyperbranched polysiloxane contains more silanol groups. Due to the instability of silanol groups, it is likely to be easily further dehydrated and condensed to form a Si-O-Si structure during storage, resulting in crosslinking and eventually forming gel
Obviously, this feature makes the hyperbranched polysiloxane very limited in its application in modern large-scale production, storage and transportation.

Method used

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  • Surface modified carbon nanotube and preparation method thereof
  • Surface modified carbon nanotube and preparation method thereof
  • Surface modified carbon nanotube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. Synthesis of hyperbranched polysiloxane containing phosphaphenanthrene structure and epoxy group

[0035] Take 4.0g of distilled water and 47.3g of 3-glycidyloxypropyltrimethoxysilane and mix evenly, then slowly add 1mL of HCl with a concentration of 36.5% drop by drop at room temperature and under stirring; React for 4 hours; after the reaction is complete, vacuum-dry to obtain transparent and viscous hyperbranched polysiloxane containing epoxy groups.

[0036] Get 20g of the above-mentioned hyperbranched polysiloxane containing epoxy groups, 7.5g 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 120mL n-propanol, mix well, add three Phenyl phosphorus 0.3g, heat up to 99°C, keep warm for 5 hours, distill under reduced pressure to obtain a light yellow liquid, add 10g of hexamethyldisiloxane and 0.8g deionized water to 10g of the above light yellow liquid and mix, heat to 72°C constant temperature reaction for 6 hours. After purification, filtration, vacuum di...

Embodiment 2

[0055] 1. Synthesis of phosphorus-containing phenanthrene structure and epoxy-based hyperbranched polysiloxane

[0056] Take 5.8g of distilled water and 47.3g of 3-glycidyloxypropyltrimethoxysilane and mix evenly, then slowly add 1mL of 33.5% H 2 SO 4 After the dropwise addition, the temperature was raised to 55° C. to continue the reaction for 4 hours; after the reaction was completed, vacuum drying was carried out to obtain a transparent and viscous hyperbranched polysiloxane containing epoxy groups.

[0057] Take 20g of the above-mentioned epoxy-containing hyperbranched polysiloxane, mix 7.5g 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with 120mL propanol, add triphenyl Base phosphorus 0.3g, heat up to 99°C, keep warm for 10 hours, distill under reduced pressure, then purify, filter, and distill under reduced pressure to obtain a light yellow liquid; add 20g of hexamethyldisiloxane and 2g of deionized water 20 g of the above light yellow liquid was mixed, hea...

Embodiment 3

[0064] 1. Synthesis of phosphorus-containing phenanthrene structure and epoxy-based hyperbranched polysiloxane

[0065] Take 4.7g of distilled water and 23.6g of 3-glycidyloxypropyltrimethoxysilane and mix evenly, then slowly add 1mL of HCl with a concentration of 36.5% dropwise at room temperature and under stirring; React for 4 hours; after the reaction is complete, vacuum-dry to obtain transparent and viscous hyperbranched polysiloxane containing epoxy groups.

[0066]Take 20g of the above-mentioned hyperbranched polysiloxane containing epoxy groups, mix 7.5g 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide with 120mL methanol, add triphenyl Phosphorus 0.6g, heat up to 95°C, keep warm for 8 hours, distill under reduced pressure to obtain a light yellow liquid; add 20g of hexamethyldisiloxane and 2g of deionized water to 20g of the above light yellow liquid and mix, heat to 78°C The reaction was carried out for 10 hours to obtain the crude product. Dissolve the crude pro...

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Abstract

The invention relates to a surface modified carbon nanotube, the surface of which is grafted with hyperbranched polysiloxane containing a phosphaphenanthrene structure and epoxide groups through chemical bonding. A preparation method for the surface modified carbon nanotube comprises the following steps: mixing prepared hyperbranched polysiloxane containing a phosphaphenanthrene structure and epoxide groups with a functionalized carbon nanotube, adding the catalyst triphenylphosphine, adding an obtained mixture into a solvent, carrying out ultrasonic treatment, and removing the solvent after a reaction is finished so as to obtain the surface modified carbon nanotube. The surface modified carbon nanotube provided in the invention contains active reactive groups, can well disperse in thermosetting resin and endows the thermosetting resin with good flame resistance and toughness on the basis of maintaining heat resistance and rigidity of the thermosetting resin; therefore, the surface modified carbon nanotube has immense application potential in the fields of research and development of novel high-molecular materials, modification, high performance development and multi-functionalization of polymers, etc.

Description

technical field [0001] The invention relates to an inorganic nanotube and a preparation method thereof, in particular to a surface-modified carbon nanotube and a preparation method thereof. Background technique [0002] Carbon nanotube (CNT) is characterized by its extremely large aspect ratio (greater than 100), high modulus and high strength (theoretical strength can reach 1.0TPa, which is 100 times that of steel), high elongation, And excellent heat and chemical resistance, and considered to be the ultimate carbon fiber, it is an ideal reinforcement for next-generation high-performance structural composites and multifunctional materials. The continuous improvement of CNT synthesis technology, the continuous improvement of production efficiency and the gradual reduction of prices provide material guarantee for large-scale research and application of CNT. [0003] In the past two decades, a large number of researches have been carried out on CNT / polymer-based composite mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00B82Y40/00C01B32/168
Inventor 梁国正张志勇顾嫒娟袁莉陈倩陈桐缪承赟
Owner SUZHOU UNIV
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