Nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material and preparation method thereof

A technology of nanocellulose and polydopamine layer, which is applied in the field of layered biomimetic composite materials, can solve the problems of poor tensile strength and toughness, and achieve the effect of improving tensile strength and simple operation method

Active Publication Date: 2019-06-14
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of poor tensile strength and toughness of existing bionic materials, the inventio

Method used

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  • Nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material and preparation method thereof
  • Nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material and preparation method thereof
  • Nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a method for preparing nanocellulose-reinforced graphene oxide / polydopamine layered biomimetic material, comprising the following steps:

[0047] Step 1, weighing graphene oxide, nanocellulose and dopamine of certain quality respectively, the quality of described dopamine is 5wt% of above-mentioned three kinds of raw materials total mass;

[0048] Step 2. Dissolve graphene oxide and nanocellulose in deionized water respectively, mix the obtained graphene oxide solution and nanocellulose solution evenly, add Tris buffer solution to adjust the pH value of the obtained solution to 8.5, add dopamine and stir for a certain time time to obtain a mixed solution;

[0049] Step 3: vacuum filter the mixed solution obtained in step 2 to form a film, and dry the obtained film at a certain temperature for a certain period of time to obtain a nanocellulose-reinforced graphene oxide / polydopamine layered biomimetic material.

Embodiment 2

[0051] This embodiment provides a method for preparing nanocellulose-reinforced graphene oxide / polydopamine layered biomimetic material, comprising the following steps:

[0052] Step 1, weigh graphene oxide, nanocellulose and dopamine of certain quality respectively, the quality of described dopamine is 5wt% of above-mentioned three kinds of raw materials total mass, the quality of described nano-cellulose is above-mentioned three kinds of raw materials total mass 4.5-20 wt%; the nanocellulose used in this embodiment has a diameter of 20-50 nm.

[0053] Step 2. Dissolve graphene oxide and nanocellulose in deionized water respectively, mix the obtained graphene oxide solution and nanocellulose solution evenly, add Tris buffer solution to adjust the pH value of the obtained solution to 8.5, add dopamine and stir for a certain time time to obtain a mixed solution;

[0054] Step 3: vacuum filter the mixed solution obtained in step 2 to form a film, and dry the obtained film at a ...

Embodiment 3

[0057] This embodiment provides a method for preparing nanocellulose-reinforced graphene oxide / polydopamine layered biomimetic material, comprising the following steps:

[0058] Step 1, weigh graphene oxide, nanocellulose and dopamine of certain quality respectively, the quality of described dopamine is 5wt% of above-mentioned three kinds of raw materials total mass, the quality of described nano-cellulose is above-mentioned three kinds of raw materials total mass 4.5-20 wt%; the nanocellulose used in this embodiment has a diameter of 20-50 nm.

[0059] The preparation method of graphene oxide in this example is to measure 46ml of concentrated sulfuric acid, add 2g of graphite powder and 1g of sodium nitrate respectively, then slowly add 6g of potassium permanganate, control the solution temperature at 0-10°C, and stir for 80-100min. Heat the solution to 30-40°C, stir for 20-40min, add 220ml deionized water dropwise to the solution, control the solution temperature at 90-100°C...

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Abstract

The invention relates to a nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material and a preparation method thereof, and belongs to the technical field of laminated bionic composite materials. In order to solve the problems of poor tensile strength and toughness of a traditional bionic material, the invention provides a preparation method for the nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material. Graphene oxide and nano-crystalline cellulose are respectively dissolved in deionized water to be mixed, then, the pH (Potential of Hydrogen) value of the solution is regulated to 8.5, dopamine is added to be stirred evenly, vacuum suction filtration is carried out to form a film, and the film is dried to obtain the nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material. According to the nano-crystalline cellulose reinforced graphene oxide/ polydopamine laminated bionic material, the nano-crystalline cellulose is taken as a reinforcement phase to improve the tensile strength, the elasticity modulus and the toughness of the laminated bionic material; through HI (Hydroiodic Acid) solution reduction and CuCl2 solution processing, the laminated bionic material has better electric conduction performance, and therefore, the laminated bionic material can be applied to fields,including aerospace, flexible anodes, artificial muscles, tissue engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of layered biomimetic composite materials, in particular to a nanocellulose-reinforced graphene oxide / polydopamine layered biomimetic material and a preparation method thereof. Background technique [0002] In nature, shell mother-of-pearl has a special organic-inorganic layered structure, which makes it have excellent mechanical properties. Natural shell mother-of-pearl is mainly composed of 95vol% calcium carbonate and about 5vol% organic polymer layers, showing a unique "brick-mud" structure. In addition, the organic polymer component also contains chitin nanofibrils, which are three-component micro-nano layered structures composed of two-dimensional calcium carbonate sheets, one-dimensional nanofibrils and proteins. The test results show that shell mother-of-pearl has excellent tensile strength and fracture toughness, and its strength and toughness far exceed that of calcium carbonate monomer, which are...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L79/04C08K3/04C08J5/18C08G73/06
Inventor 刘镇波李慕之苗媛媛
Owner NORTHEAST FORESTRY UNIVERSITY
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