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A method for preparing one-dimensional nanomaterials with high aspect ratio by depolymerizing clay mineral crystal beams

A technology of clay minerals and high aspect ratio, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of one-dimensional nanosilicate materials that have no literature reports and no application precedents, etc., to solve the problem of preventing The effect of secondary reunion, simple process and low energy consumption

Active Publication Date: 2019-07-19
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In summary, each dissociation method has its own advantages, and they can be effectively combined to become a new way for efficient and non-destructive dissociation of one-dimensional clay mineral crystal beams. The preparation of pure one-dimensional nano-silicate materials has neither been reported in the literature nor applied before.

Method used

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  • A method for preparing one-dimensional nanomaterials with high aspect ratio by depolymerizing clay mineral crystal beams
  • A method for preparing one-dimensional nanomaterials with high aspect ratio by depolymerizing clay mineral crystal beams
  • A method for preparing one-dimensional nanomaterials with high aspect ratio by depolymerizing clay mineral crystal beams

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Experimental program
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Effect test

Embodiment 1

[0025] 100 kg of attapulgite raw ore was crushed and treated with rollers, and the water content of attapulgite raw ore was adjusted to 39% with hydrogen peroxide aqueous solution (mass fraction 1%); attapulgite raw ore was squeezed to obtain attapulgite with a thickness of 4 mm Stone raw ore flakes; the raw ore flakes were first frozen at -10°C for 12 hours, then thawed by microwave at 1000 W, 2450 MHz for 20 minutes, and then directly and evenly dispersed in methanol / water solution (volume percentage of methanol was 20%). After the mechanical stirring is uniform, the cyclone classification is carried out to remove the quartz sand and large particles, and then the high-pressure homogeneous treatment is performed under 60 MPa; the suspension obtained by the homogeneous treatment is hydraulically filtered to obtain a filter cake with a water content of 60%, and then extruded with a twin-screw extruded out of the machine, dried at 80°C, and crushed to obtain a white nano attapulg...

Embodiment 2

[0028]100 kg of sepiolite raw ore is crushed and treated with double rollers, adjusted to 39% water content of sepiolite raw ore with hydrogen peroxide solution (3% by mass), and seafoam with a thickness of 0.2 mm is obtained after extrusion treatment Raw stone ore flakes: Freeze the raw sepiolite flakes at -40°C for 2 h, then thaw them with 4000 W, 2450 MHz microwaves for 20 minutes, and then directly and evenly disperse them in ethanol / water solution (volume percentage of ethanol is 20%), mechanically stirred evenly, and then carried out cyclone classification treatment to remove quartz sand and large particles, and then high-pressure homogeneous treatment at 50 MPa; the obtained suspension hydraulic filtration obtained a filter cake with a water content of 60%, and then extruded with a twin-screw extruded out of the machine, dried at 80°C, and crushed to obtain a white nano sepiolite product.

[0029] When the obtained nano-sepiolite is dispersed in water at 10%, the sepiol...

Embodiment 3

[0031] 100 kg halloysite raw ore is crushed and treated with rollers, the water content of halloysite raw ore is adjusted to 35% with hydrogen peroxide solution (mass fraction 3%), and halloysite raw ore with a thickness of 1 mm is obtained by extrusion Thin slices: Freeze halloysite raw ore flakes at -30°C for 12 hours, then thaw them with 3000 W, 2450 MHz microwaves for 15 minutes, and then directly and evenly disperse them in 8% isopropanol / water solution (isopropanol volume percentage of 8%), mechanically stirred evenly, and then carried out cyclone classification to remove quartz sand and large particles, and then subjected to high-pressure homogenization treatment at 50 MPa, the obtained suspension was hydraulically filtered to obtain a filter cake with a water content of 45%, and then used Extruded by a twin-screw extruder, dried at 120° C., and pulverized to obtain a white nano halloysite product.

[0032] When the obtained nano halloysite is dispersed in water at 10%,...

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Abstract

The invention discloses a method for preparing a one-dimensional nano-material with high length-diameter ratio by depolymerizing clay mineral crystal bundles, and belongs to the technical field of deep processing of non-metallic ores and preparation of nano-materials. According to the method, treatment processes such as squeezing, freezing-thawing, microwave and extrusion are effectively combined to form superiority supplementary, efficient dissociation of one-dimensional clay mineral crystal bundles is achieved, secondary aggregation of dissociated crystal bundles is effectively prevented, one-dimensional silicate nano-materials with single-crystal dispersion are acquired at the indoor temperature, and higher-value application of one-dimensional clay minerals is facilitated in the fields such as plastics, rubber, membranes, catalysts and functional composite materials. According to the method, high temperature and high pressure are omitted, the method is low in energy consumption, green, environmentally friendly and simple and easy in process, other chemical substances are not introduced, continuous production can be achieved, solvents can be recycled, and emission is omitted.

Description

technical field [0001] The invention relates to a method for preparing one-dimensional nanomaterials with high aspect ratio by depolymerizing clay mineral crystal beams, and belongs to the technical field of deep processing of non-metallic ores and preparation of nanometer materials. Background technique [0002] my country is rich in non-metallic mineral resources, among which one-dimensional clay minerals represented by attapulgite, sepiolite and halloysite are found in Jiangsu, Inner Mongolia, Gansu, Hunan, Sichuan, Shaanxi, Shaanxi, Hebei, Henan, Yunnan, Guangxi and other regions. Large-scale high-quality ore deposits have been discovered, which has huge potential application value in the field of functional materials. However, these minerals are currently only used to develop low-value-added products such as decolorizers, drilling mud, pet litter, air purifiers, and building fillers, which not only causes a great waste of resources, but also has not transformed "resource...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40B82Y30/00
CPCB82Y30/00C01B33/40C01P2002/01C01P2002/10C01P2002/72C01P2004/03
Inventor 王文波王爱勤康玉茹牟斌汪琴朱永峰宗莉张俊平
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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