A kind of method for preparing graphene oxide reinforced magnetic hydrogel
A technology of graphene and magnetic water, applied in the direction of subferrous oxide, iron oxide/iron hydroxide, etc., can solve the problem of low mechanical strength, achieve the effect of enhancing mechanical properties and overcoming low impact strength
Active Publication Date: 2015-11-18
HARBIN INST OF TECH
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[0008] The purpose of the patent of the present invention is to prepare graphene oxide (GO), ferric oxide (Fe 3 o 4 ), polyvinyl alcohol (PVA) composite hydrogel, to solve the problem of low mechanical strength of polyvinyl alcohol hydrogel in the application process, in order to improve its mechanical properties
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[0044] Preparation of graphene oxide, ferric oxide, polyvinyl alcohol composite hydrogel, the experimental part is mainly divided into preparation of graphene oxide, ferric oxide, graphene oxide / ferric oxide / polyvinyl alcohol composite hydrogel three Most, and by XRD ( figure 1 , Figure 5 ), FT-IR ( figure 2 ), TEM ( image 3 ), Raman ( Figure 4 ), analyze and determine the morphology and composition of the prepared materials.
[0045] Preferably, in order to solve the above-mentioned technical problems, the technical scheme of the patent of the present invention is as follows: adopt improved Hummers method to prepare graphene oxide, oxidize it with concentrated sulfuric acid and concentrated phosphoric acid mixed acid; adopt co-precipitation method to prepare ferric oxide, and then weigh Take 40ml of ultrapure water and 8g of PVA, mix them into a 400ml beaker and heat in a boiling water bath; after heating for 3 minutes, the peripheral PVA and water dissolve, and then ...
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Abstract
The invention relates to the field of high polymer materials, and provides a method for preparing a graphene oxide enhanced magnetic hydrogel. The graphene oxide enhanced magnetic hydrogel comprises graphene oxide, ferriferrous oxide and polyvinyl alcohol. The method comprises the steps of putting polyvinyl alcohol and ultra-pure water into a container according to a ratio that 1g of polyvinyl alcohol is added into 5ml of ultra-pure water, stirring slowly, and heating for 10 minutes; transferring the molten polyvinyl alcohol into an environment of minus 20 DEG C to freeze the polyvinyl alcohol for 21 hours; unfreezing the frozen polyvinyl alcohol for 3 hours; repeating the previous steps twice, and adding graphene oxide and ferriferrous oxide into the polyvinyl alcohol which is unfrozen for three times. By adopting the graphene oxide enhanced magnetic hydrogel prepared by the method disclosed by the invention, the added graphene oxide is favorable for enhancing mechanical properties of the magnetic hydrogel and overcoming the defects of low impact strength, easy breaking under a stress and the like of a hydrogel material.
Description
technical field [0001] The invention relates to the field of polymer materials and provides a method for preparing graphene oxide reinforced magnetic hydrogel. Background technique [0002] Hydrogels are composed of polymers with a three-dimensional network structure and water molecular media filled in the gaps between the polymer network chains. Hydrogel materials are widely used in medicine, medical treatment, artificial organs, physiology, and environmental protection due to their high water content, softness, rubber-like viscosity, and good biocompatibility. Due to their huge application prospects, More and more people of all ages. The research and application development of hydrogels around the world presents a thriving scene. In recent years, with the continuous development of hydrogels, people add inorganic nanomaterials to hydrogels, which can not only improve the mechanical strength of hydrogels, but also endow gels with special new properties, such as: electrical...
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IPC IPC(8): C08J3/075C08L29/04C08K9/02C08K3/04C08K3/22C01G49/08
Inventor 张科赵九蓬李垚李阳阳
Owner HARBIN INST OF TECH