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Preparation method of high polymer product provided with multi-scale foam structure and applications of high polymer product provided with multi-scale foam structure

A multi-scale, high-molecular technology, applied in the field of foamed high-molecular product preparation, can solve the problems of inability to obtain high-molecular materials, mass production, and low production efficiency, and achieve the effect of easy promotion, mass production, and fewer processes

Active Publication Date: 2013-06-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has low production efficiency and cannot be mass-produced, which is not conducive to popularization in industrial production.
In addition, this method has higher requirements on the pressure relief system, that is, the equipment is required to have the function of releasing pressure to a certain pressure value and maintaining it for a certain period of time before releasing pressure, and this method can only obtain double scales but cannot obtain more Polymer materials with scale cell structure

Method used

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  • Preparation method of high polymer product provided with multi-scale foam structure and applications of high polymer product provided with multi-scale foam structure
  • Preparation method of high polymer product provided with multi-scale foam structure and applications of high polymer product provided with multi-scale foam structure
  • Preparation method of high polymer product provided with multi-scale foam structure and applications of high polymer product provided with multi-scale foam structure

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In this embodiment, a method for preparing a polymer product with a double-scale cell structure includes the following steps:

[0048] (1) Add PS (polystyrene) pellets into the extruder, and extrude to prepare PS rod-like splines with a diameter of about 1mm and a length of 10mm;

[0049] (2) Put the PS rod-shaped sample prepared in step (1) into the autoclave, and pass supercritical CO 2 , after continuous saturation for 5 hours, the temperature was raised to the foaming temperature of 100°C, and after being maintained for 40 minutes, the pressure in the autoclave cavity was reduced to atmospheric pressure within 1 second to obtain a PS product with a double-scale cell structure.

[0050] Figure 6A and Figure 6B Shown is a scanning electron micrograph of the PS prepared above. It can be seen from the figure that a double-scale cell structure is formed in the prepared PS product, the average diameter of the large and small cells is about 50.0 μm and 10.5 μm, and th...

Embodiment 2

[0053] This embodiment is a method for preparing a polymer product with a double-scale cell structure, comprising the following steps:

[0054] (1) Add PLA (polylactic acid) pellets into the extruder, and extrude to prepare a PLA rod-shaped strip with a diameter of about 1mm and a length of 10mm;

[0055] (2) Put the PLA rod-shaped strip prepared in step (1) into the autoclave, and pass supercritical CO 2 , after continuous saturation for 3 hours, the temperature was raised to the foaming temperature of 150°C, and after being maintained for 40 minutes, the pressure in the autoclave cavity was reduced to atmospheric pressure within 1 second to obtain a PLA product with a double-scale cell structure.

[0056] Figure 8A and Figure 8B Scanning electron micrographs of the PS prepared above. It can be seen from the figure that the double-scale cell structure with open cells is formed after PLA foaming.

Embodiment 3

[0058] In this embodiment, a method for preparing a polymer product with a double-scale cell structure includes the following steps:

[0059] (1) Weigh 70 parts of PS and 30 parts of PLA by volume and mix them together;

[0060] (2) Add the mixture of step (1) into the extruder and extrude to prepare a PS / PLA blend with a diameter of about 1mm and a length of 10mm;

[0061] (3) Put the PS / PLA blend prepared in step (2) into the autoclave, and feed supercritical CO 2 , after continuous saturation for 3 h, the temperature was raised to 150 °C for foaming, and after maintaining for 40 min, the pressure in the autoclave cavity was reduced to atmospheric pressure within 1 s to obtain a foamed PS / PLA blend with a double-scale cell structure.

[0062] Figure 9A and Figure 9B Shown is a scanning electron micrograph of the PS / PLA blend prepared above. It can be seen from the figure that the foamed blend presents a double-scale cell structure. According to statistics, the average ...

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Abstract

The invention discloses a preparation method of a high polymer product provided with a multi-scale foam structure. The method includes that raw materials are molded to be samples, then the samples are placed in an autoclave, supercritical fluid is introduced into the autoclave, pressure is maintained, or the raw materials and the supercritical fluid are simultaneously added into a molding device, the synergistic effect of temperature rise and pressure relief is utilized to foam high polymer materials, and different foaming performances of the high polymer materials are combined to manufacture the high polymer product provided with the multi-scale foam structure. Compared with a common foaming method, the preparation method of the high polymer product provided with the multi-scale foam structure can improve connectivity of the manufactured product which can be used for aspects such as tissue engineering, super-hydrophobic, filtering and the like. Besides, the method is less in process, capable of achieving batch production, and easy to promote in industrial production.

Description

technical field [0001] The invention relates to the technical field of preparation of foamed polymer products, in particular to a method for preparing a polymer product with a multi-scale cell structure. Background technique [0002] A polymer product with a multi-scale cell structure refers to a new type of material with two or more cells of different sizes inside. This material has excellent properties of cells of various sizes and has many potential applications. Compared with ordinary foamed products, the contact angle between the surface of polymer products with multi-scale cell structure and other substances is greatly improved, thereby expanding the application of polymer materials in superhydrophobic aspects; Molecular materials, polymer materials with multi-scale cell structure have better mechanical properties and higher connectivity, which is more conducive to the inflow required for cell growth and the outflow of cell excretion, so it is more suitable for biolog...

Claims

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Application Information

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IPC IPC(8): B29C67/20C08J9/30
Inventor 黄汉雄许琳琼
Owner SOUTH CHINA UNIV OF TECH
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