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Graphene oxide-chitin nanofiber hybrid nanoparticle, preparation method thereof and application of nanoparticle

A technology of hybridizing nanoparticles and nanofibers, which is applied in the field of nanomaterials to achieve excellent performance

Active Publication Date: 2018-12-25
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The existing technology has not been able to prepare graphene oxide-chitin nanofiber hybrid particles with stable combination and wide processability

Method used

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  • Graphene oxide-chitin nanofiber hybrid nanoparticle, preparation method thereof and application of nanoparticle
  • Graphene oxide-chitin nanofiber hybrid nanoparticle, preparation method thereof and application of nanoparticle
  • Graphene oxide-chitin nanofiber hybrid nanoparticle, preparation method thereof and application of nanoparticle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1. Preparation of Graphene Oxide

[0057] Modified Hummers method prepares graphene oxide:

[0058] Pour 2g of natural graphite, 120mL of concentrated sulfuric acid and 6g of potassium permanganate into a 250mL three-neck flask, place it in an ice-water bath, and stir for 2 hours below 4°C; raise the temperature of the system to 50°C, and keep it warm for 6 hours; the reaction is over Finally, add 240mL of distilled water and 2-5mL of hydrogen peroxide, and continue to stir for 30min, then centrifugally wash the obtained graphene oxide to remove excess acid and impurities, and finally place the obtained graphene oxide dispersion in a 4°C refrigerator for later use. The Zeta potential of the obtained graphene oxide was -41mV, and the viscosity of its dispersion was 17.52mPa.s (concentration: 3mg / ml) at 25°C.

[0059] 2. Preparation of dual-electric chitin nanofibers

[0060] First, mix 10g of chitin powder with 200mL of 35% sodium hydroxide, stir and heat at 90°C for 1...

Embodiment 2

[0066] Same as Example 1, the difference is only that the pH of the mixed solution is adjusted to be equal to 5.0.

[0067] The Zeta potential of the obtained graphene oxide-chitin nanofiber hybrid nanoparticle aqueous dispersion is-56mV, and at 25°C, the graphene oxide-chitin nanofiber hybrid nanoparticle aqueous dispersion (concentration is 3mg / ml) The viscosity is 250mPa.s.

[0068] The atomic force microscope image of the graphene oxide-chitin nanofiber hybrid nanoparticles is shown in image 3 shown.

Embodiment 3

[0070] Same as Example 1, the difference is only that the pH of the mixed solution is adjusted to be equal to 6.2.

[0071] The Zeta potential of the obtained graphene oxide-chitin nanofiber hybrid nanoparticle aqueous dispersion was -54mV, and the viscosity (25°C, concentration: 3mg / ml) was 325mPa.s.

[0072] The atomic force microscope image of the graphene oxide-chitin nanofiber hybrid nanoparticles is shown in Figure 4 shown.

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Abstract

The invention belongs to the field of nano-materials, and particularly relates to a graphene oxide-chitin nanofiber hybrid nanoparticle, a preparation method thereof and an application of the nanoparticle. The graphene oxide-chitin nanofiber hybrid nanoparticle is characterized in that graphene oxide and double electrical chitin nanofibers are combined in a hybridized manner, and the graphene oxide-chitin nanofiber hybrid nanoparticle can be stably dispersed in water. The graphene oxide-chitin nanofiber hybrid nanoparticle has high electric charge density and viscosity, can be stably dispersedin the water and has diversified assembly modes and processability.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a graphene oxide-chitin nanofiber hybrid nanoparticle and a preparation method and application thereof. Background technique [0002] Hybridization refers to the combination of two different components at the nanoscale or molecular scale through special interactions to form a whole. Hybridization provides people with the possibility to construct high-performance and multifunctional materials more efficiently. [0003] Graphene oxide is the most important precursor of graphene. There are a large number of oxygen-containing groups on its surface and edges, such as carboxyl, hydroxyl and epoxy groups, which facilitate modification and modification, and graphene oxide can be reduced by rebuild sp 2 structure to obtain high-performance graphene materials. [0004] Chitin is a nitrogen-containing natural polymer material, and its natural reserves are second only to cel...

Claims

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Application Information

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IPC IPC(8): B01J13/00
CPCB01J13/0091
Inventor 张建明庞凯段咏欣杨菲
Owner QINGDAO UNIV OF SCI & TECH
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