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Method of preparing polymeric hollow microspheres by three-dimensional random flow field

A hollow microsphere and polymer technology, which is used in the field of polymer processing and molding, can solve the problems of uneven wall thickness, poor spheroidization of polymer hollow microspheres, and reduced mechanical properties, so as to improve sphericity and uniform wall thickness. properties, overcoming fixed orientation problems, reducing the effect of aspherical tendencies

Active Publication Date: 2017-11-17
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of microfluidic preparation of W1 / O / W2 emulsions, the inner water phase W1 is injected into the oil phase O to form water-in-oil (W1 / O) droplets, and then the W1 / O emulsion is formed by using the outer water phase W2. The W1 / O / W2 double emulsion particles are formed by particle washing, and the double emulsion particles are collected by a curing container, and then solidified to obtain microspheres. However, the polymer hollow microspheres obtained by the existing curing method have poor spheroidization and uneven wall thickness. And most of them have cracks
The surface roughness of these cracked polystyrene hollow microspheres will increase, the mechanical properties will decrease, and the application fields will narrow

Method used

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  • Method of preparing polymeric hollow microspheres by three-dimensional random flow field
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Examples

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Embodiment 1

[0031] A method for preparing polymer hollow microspheres using a three-dimensional random flow field, comprising the following steps:

[0032] Step 1. Prepare 0.05wt% polyacrylic acid aqueous solution, filter it with a filter membrane of 5 μm, and obtain W2 external aqueous phase solution; process a hemispherical container with threads by using polytetrafluoroethylene material; add W2 external aqueous phase solution into the hemispherical container Middle; the size of the hemispherical container is 5cm in outer diameter, 3cm in inner diameter, and 1cm in wall thickness;

[0033] Step 2. Dissolve poly-α-methylstyrene in fluorobenzene to prepare a 12wt% O oil phase solution; use distilled water as the inner water phase of W1, and use microfluidic technology to generate W1 inner water phase / O oil phase / W2 outer phase Water phase double compound emulsion;

[0034]Step 3, using the hemispherical container equipped with the W2 external aqueous phase solution to collect the double ...

Embodiment 2

[0038] A method for preparing polymer hollow microspheres using a three-dimensional random flow field, comprising the following steps:

[0039] Step 1: prepare 1wt% polyacrylic acid aqueous solution, filter it with a filter membrane of 5 μm, and obtain W2 external aqueous phase solution; process a hemispherical container with threads by utilizing polytetrafluoroethylene material; add W2 external aqueous phase solution into the hemispherical container ; The size of the hemispherical container is that the outer diameter is 6cm, the inner diameter is 4cm, and the container wall thickness is 1cm;

[0040] Step 2. Dissolve polystyrene in toluene to prepare a 15wt% O oil phase solution; use distilled water as the inner water phase of W1, and use microfluidic technology to produce a double composite of W1 inner water phase / O oil phase / W2 outer water phase Milk grains;

[0041] Step 3, using the hemispherical container equipped with the W2 external aqueous phase solution to collect t...

Embodiment 3

[0045] A method for preparing polymer hollow microspheres using a three-dimensional random flow field, comprising the following steps:

[0046] Step 1, prepare 1.5wt% polyvinyl alcohol aqueous solution, filter with a filter membrane of 5 μm to obtain W2 external aqueous phase solution; use polytetrafluoromaterial to process threaded hemispherical container; add W2 external aqueous phase solution to hemispherical device;

[0047] Step 2. Dissolve deuterated polystyrene in 1,2-dichloroethane to prepare a 10wt% O oil phase solution; use distilled water as the internal water phase of W1, and use microfluidic technology to generate the internal water phase of W1 / O Oil phase / W2 external water phase double composite emulsion;

[0048] Step 3, using the hemispherical container equipped with the W2 external aqueous phase solution to collect the double composite emulsion, and tightening the two hemispherical containers through threads to form a spherical container that encapsulates the...

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Abstract

The invention discloses a method of preparing polymeric hollow microspheres by a three-dimensional random flow field. The polymeric hollow microspheres with high concentricity and sphericity are prepared by the three-dimensional random flow field. According to the method, polytetrafluorous translucent material is processed into a spherical container, the spherical container is carried by a four-shaft rotary apparatus, and through adjustment of the rotating speeds of driving shafts, the stable flow field in the random directions is achieved. The flow field is solidified with W1 / O / W2 composite emulsion particles for combination, so that the capacities of concentricalization of inner water phase liquid drops and an intermediate layer film and spherical adjustment. The polymeric hollow microspheres with high concentricity and high geometrical sphericity can be used for a physical experiment of laser-driven inertial confinement fusion.

Description

technical field [0001] The invention belongs to the field of polymer processing and molding, and in particular relates to a method for preparing polymer hollow microspheres by using a three-dimensional random flow field. Background technique [0002] With the depletion of the three traditional fossil fuels of coal, oil and natural gas, people are paying more and more attention to the development of new energy, among which nuclear energy resources are considered to be the most potential new energy. There are two ways to use nuclear energy: one is the fission of heavy nuclear elements and the other is the fusion of light nuclear elements. Among them, nuclear fission has been practically applied in production, but in nuclear fission reactions, there are not many fission fuel reserves in nature, and fission fuel is radioactive and dangerous, so the advantages of nuclear fission cannot be fully utilized. In contrast, nuclear fusion has obvious advantages. Its fuel is abundant in...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08J3/12
CPCC08J3/12C08J9/28C08J2325/02C08J2325/06
Inventor 陈强陈素芬潘大伟刘梅芳漆小波李波张占文
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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