Preparation method of silane coupled nanometer magnetic composite ferroferric oxide material

A technology of ferroferric oxide and nano-magnetism, which is applied in the field of nano-material manufacturing to achieve the effects of simple operation steps, uniform particle size distribution, and low cost

Inactive Publication Date: 2006-07-19
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, silane-coupled nano-magnetic composi

Method used

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  • Preparation method of silane coupled nanometer magnetic composite ferroferric oxide material
  • Preparation method of silane coupled nanometer magnetic composite ferroferric oxide material
  • Preparation method of silane coupled nanometer magnetic composite ferroferric oxide material

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preparation example Construction

[0022] Weigh a certain amount of prepared nano-Fe 3 o 4 Particles are added with a dispersing solvent, ultrasonically washed, and magnetically separated to remove impurities. The dispersion solvent is added again. Under the protection of inert gas, slowly add a certain amount of silane coupling reagent. Under the condition of heating and constant temperature, the reaction was vigorously stirred. After the reaction is over, the product is washed and magnetically separated. Vacuum-dried to obtain a silanized nano-magnetic composite material.

[0023] The dispersing solvent is a hydrocarbon or alcohol solvent, and the best dispersing solvent is a saturated hydrocarbon, substituted benzene or saturated fatty alcohol solvent; the dispersing solvent is the best after dewatering; the ultrasonic treatment time is 0.5 -5 hours, the best time is 1-1.5 hours; the inert gas is nitrogen or argon, nitrogen is the best; the silane coupling reagent is saturated carbon chain trichlorosila...

Embodiment 1

[0034] Application of silanized nano-magnetic composite materials to enrich trace plasticizers in plastic products for food packaging, and determine trace plasticizers in plastic products for food packaging by GC-MS

[0035] Accurately weigh about 1g of plastic products for food packaging into a 10mL graduated test tube, add standards containing eight kinds of plasticizers, namely: ethyl phthalate (DEP), propyl phthalate (DPP), phthalate Butyl formate (DBP), ethylphenyl phthalate (BBP), cyclohexyl phthalate (DCHP), ethylheptyl phthalate (DEHP), octyl phthalate (DOP) standard solution, add 10mL of n-hexane, ultrasonically extract for 30min, transfer the extract to another dry graduated test tube, blow it with nitrogen until it is nearly dry, and wait for the solid phase extraction column to be further purified. Add 3g of silanized nano-magnetic composite material to a 5mL syringe cushioned with glass wool, and fill it up under vacuum to make a small column for solid phase extra...

Embodiment 2

[0037] Application of silanized nano-magnetic composite materials to enrich various organophosphorus pesticides in food (including vegetables, fruits, poultry meat, aquatic products, dry goods, etc.), and gas chromatography (nitrogen and phosphorus detector) to simultaneously determine various organophosphorus pesticides in food

[0038] Accurately weigh about 5g of food samples into a 50mL centrifuge tube, add 20mL of acetone, ultrasonically extract for 10min, and centrifuge at a centrifugal speed of 5000r / min. Separate 10mL of the extract into another dry graduated test tube. Add 3 g of silanized nano-magnetic composite material to the extract, and stir for about 5 minutes, so that the silanized nano-magnetic composite material and the extract are fully contacted and magnetically separated. Solvent was discarded. The adsorption components of the silanized nano-magnetic composite material were washed with 5 mL of 50% acetone-ethyl acetate solution, magnetically separated aga...

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Abstract

The invention relates to a method for preparing the silicane coupling nanometer magnetic compound ferriferrous oxide. First dissolving the divalent and trivalent ferric salt in the water; protected by the inert gases, adding alkali solution to alkalescence; heating and mixing to attain the nanometer ferriferrous oxide particle; adding the diffusion solvent and silicane coupling agent to be heated and mixed to attain the final product. The invention can be used in the detection of left matter of environment last contamination. The inventive method has simple process, lower cost, and the product has uniform distributed nanometer magnetic compound ferriferrous oxide, and when it is used in the detection of left matter of environment last contamination, it has better repeating property, and the material can be recycled.

Description

technical field [0001] The invention relates to a method for manufacturing nanomaterials, in particular, the invention relates to a method for preparing a silane-coupled nano-magnetic composite ferric oxide material. technical background [0002] Nano-magnetic composite materials are inorganic or organic composite materials formed by wrapping one or more hydrophobic or hydrophilic groups with nano-magnetic particles as the core through interactions such as bonding, coupling, and adsorption. Fe 3 o 4 Nano-magnetic composite materials are based on nano-Fe 3 o 4 A class of nano-magnetic composite materials for the core. Due to its diverse preparation methods, relatively easy control of the process, predictability, controllability and tailorability of structure and function, and wide application, it has gradually become a research hotspot of scientists at home and abroad. [0003] Fe 3 o 4 The preparation of nano-magnetic composite materials is mainly divided into two ste...

Claims

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Application Information

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IPC IPC(8): H01F41/02C09C3/12
Inventor 沈昊宇闻霞儿庄宇苗
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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