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Process for preparing biocompatible directional carbon nanotube array reinforced composite hydrogel

A carbon nanotube array and biocompatibility technology, which is applied in the field of preparation of oriented carbon nanotube array reinforced composite hydrogels, can solve the problems that oriented carbon nanotube reinforced hydrogel composite materials have not been reported in literature, etc. The effect of overcoming the problem of agglomeration and entanglement, promoting bonding and improving comprehensive mechanical properties

Inactive Publication Date: 2010-04-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the preparation method of oriented carbon nanotube-reinforced hydrogel composites and its application in the field of biomedicine have not been reported in the literature so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Step 1: Weigh 5 g of ferrocene powder and dissolve it in 50 mL of xylene. After mixing evenly, a brownish-yellow transparent solution was formed, which was allowed to stand for 36 hours. Mount the quartz glass sheet on the quartz boat, slowly push it into the middle of the reaction chamber of the chemical vapor deposition device, and seal both ends of the quartz tube with sealant. Introduce argon gas at a flow rate of 100 mL / min, and heat the reaction chamber to 900°C. Adjust the flow rate of argon to 2000mL / min, and feed 400mL / min of hydrogen. Move the quartz tube, adjust the position of the capillary opening relative to the furnace, keep the reading of the thermocouple at 250-300°C, and ensure that the reaction solution can be sprayed in as a mist. Turn on the precision flow pump, so that the ferrocene / xylene reactant solution is sprayed into the reaction chamber through the capillary in the form of mist, and the solution feeding speed is 0.4mL / min. After the react...

example 2

[0030] Step 1: Weigh 6g of ferrocene powder and dissolve it in 50mL of xylene. After mixing evenly, a brownish-yellow transparent solution was formed, which was allowed to stand for 30 hours. Mount the quartz glass sheet on the quartz boat, slowly push it into the middle of the reaction chamber of the chemical vapor deposition device, and seal both ends of the quartz tube with sealant. Introduce argon gas at a flow rate of 100 mL / min, and heat the reaction chamber to 900°C. Adjust the flow rate of argon to 1000mL / min, and feed 150mL / min of hydrogen. Move the quartz tube, adjust the position of the opening of the capillary relative to the furnace, keep the reading of the thermocouple at 200°C, and ensure that the reaction solution can be sprayed in as a mist. Turn on the precision flow pump, so that the ferrocene / xylene reactant solution is sprayed into the reaction chamber through the capillary in the form of mist, and the solution feeding speed is 0.4mL / min. After the reac...

example 3

[0036] Step 1: Mount the quartz glass sheet uniformly sprinkled with Co / silica gel catalyst on a quartz boat, slowly push it into the middle of the reaction chamber of the chemical vapor deposition device, and seal both ends of the quartz tube with sealant. Introduce argon gas at a flow rate of 100 mL / min, and heat the reaction chamber to 700°C. Adjust the flow rate of argon to 1000mL / min, and feed a mixed gas of hydrogen and acetylene at 150mL / min. After the reaction is complete, stop feeding the mixed gas of hydrogen and acetylene, reduce the flow rate of argon to 100mL / min, cool the reaction chamber to room temperature in an argon atmosphere, and take out the sample. An array of aligned multi-walled carbon nanotubes was obtained.

[0037] Step 2: Add analytically pure polyvinylpyrrolidone (PVP) powder into twice-distilled water to prepare an aqueous solution with a mass percentage of PVP of 5%, stir evenly in a constant temperature water bath at 60°C until PVP dissolves, a...

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Abstract

The invention provides a process for preparing biocompatible directional carbon nanotube array reinforced composite hydrogel, which utilizes the chemical vapor deposition (CVD) technique, the radial cross linking technique and a freezing and thawing method. By permeating polymer sol into a carbon nanotube prefabricated body, aggregating and tangling problems during a compounding process of the carbon nanotube and polymer are resolved, boundary strength of a reinforcing phase and a basis phase is increased, and excellent performances of the nanotube on mechanics and electricity are played sufficiently. The composite hydrogel prepared by utilizing a physical cross linking process does not contain chemical additives and meets requirements on biocompatibility. The composite hydrogel prepared by the process has controllable length and direction of the reinforcing phase of a nanotube array, has integrated mechanics and electricity performances superior to those of the conventional hydrogel,and is adoptive to be applied to the biomedical field such as artificial articular cartilages, tissues engineering supports, nerve cell carries, biomimetic implanted electrode and the like.

Description

technical field [0001] The invention relates to the field of biomedical materials, in particular to the preparation of aligned carbon nanotube array reinforced composite hydrogels. Background technique [0002] Hydrogels are cross-linked polymers that can swell in water and retain large amounts of water without dissolving. They can quickly swell to an equilibrium volume in water, still maintain their shape and three-dimensional space network structure, and dehydrate and deswell under certain conditions. They are a kind of functional polymer materials integrating water absorption, water retention and slow release. Due to the large amount of water contained in the cross-linked network, the hydrogel is very similar to biological tissue, and its soft, wet surface and affinity with the tissue greatly reduce the stimulation of the material to the surrounding tissue, making the hydrogel have good biological properties. Compatibility and tissue compatibility. Therefore, hydrogels ...

Claims

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Application Information

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IPC IPC(8): A61L27/44A61L27/52C12N11/00
Inventor 郑裕东黄彦奕马衍轩吴健韩东霏杨槐姚学锋
Owner UNIV OF SCI & TECH BEIJING
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