Method for preparing nano cilium structure on surface of polymer material

A polymer material and composite structure technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high cost and long time required, and achieve the effect of enhancing adhesion

Active Publication Date: 2022-03-04
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method also needs to adjust the length and distribution density of the micro-nano hierarchical structure by changing the structural characteristics of the alumina template (that is, the depth and distribution density of micro- and nano-pores), which is also costly and takes a long time.

Method used

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  • Method for preparing nano cilium structure on surface of polymer material
  • Method for preparing nano cilium structure on surface of polymer material
  • Method for preparing nano cilium structure on surface of polymer material

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preparation example Construction

[0037] Because the existing methods for preparing nanofibril structures usually need to adjust the length and distribution density of nanocilia by changing the structural characteristics of the mold or template, this results in high cost and long time. To this end, the present invention provides a new method for preparing a nano-cilia structure on the surface of a polymer material, which specifically includes the following steps.

[0038] First, a polymer film is placed on a metal substrate to obtain a composite structure;

[0039] The metal substrate can be titanium, gold, platinum or copper. The combination ability of metal and polymer film determines its feasibility as a metal micromask. Among the commonly used sputtering target metals, titanium and polymers have stronger adhesion than other metals. Therefore, titanium is easier to form a micro-mask on the surface of polymers than other metals.

[0040] In the present invention, the polymer film is not particularly limite...

Embodiment 1

[0060] Firstly, a pre-prepared parylene C film (pore size 8 μm) with a microporous structure was placed on a titanium sheet substrate to obtain a composite structure.

[0061] Then, reactive ion etching was performed on the composite structure as a whole to form a nano-cilia structure, wherein the etching gas was oxygen, the oxygen flow rate was 60 sccm, the etching radio frequency power was 150 W, and the etching time was 300 s. The length of the resulting nanocilia is about 1.2 μm.

[0062] Finally, the titanium sheet substrate was removed to obtain a polymer material with a nano-cilia structure on the surface, and the scanning electron microscope images from different viewing angles are as follows figure 2 shown.

Embodiment 2

[0064] Carry out according to the method of embodiment 1, the difference is that the parylene C microporous film with microporous structure is replaced with the pre-prepared parylene C film without microporous structure. The length of the resulting nanocilia is about 1.2 μm. The scanning electron microscope image of the polymer material (without microporous structure) with nano-cilia structure on the prepared surface is as follows: image 3 shown. The scanning electron microscope image of the parylene C film without nano-cilia structure and microporous structure (that is, the pre-prepared parylene C film without microporous structure) is as follows: Figure 4 shown.

[0065] The contact angle of the polymer material with nano-cilia structure on the surface is tested with water, and the result is about 0°. This indicates that the polymer material becomes a superhydrophilic surface after being modified with nanocilia. The photo of the contact angle measurement of the polymer...

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Abstract

The invention relates to a method for preparing a nano cilia structure on the surface of a polymer material. According to the method, the length and density distribution of the nano cilia can be simply and quickly regulated and controlled at low cost. The polymer material with the nano cilium structure on the surface prepared by the method can capture a submicron-sized target object, so that the polymer material can be used as a filter membrane for separating the submicron-sized target object. The modification of the nano cilia can realize the expansion of the hydrophilic and hydrophobic properties of the surface of the polymer material. The metal adhesion on the surface of the polymer material can be enhanced through nano cilium modification.

Description

technical field [0001] The invention relates to the field of micro-nano processing and membrane filtration, in particular to a method for preparing a nano-cilia structure on the surface of a polymer material. Background technique [0002] Surface engineering is an important application direction of micro-nano processing technology. Nanostructures on the surface of materials can be used for hydrophilic and hydrophobic modification or nano target capture. [0003] The invention patent with the application number 201510124275.0 discloses a high aspect ratio flexible structure manufacturing method, including: preparing a polydimethylsiloxane (PDMS) mold by embossing on the basis of a silicon-based nanocilia array, and then using the PDMS mold Fabrication of high aspect ratio flexible nanocilia based on UV-curable adhesive OrmoStamp material by imprinting. This method needs to prepare a mold and undergo two imprints, which is complicated to operate and does not specify the spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12B29C59/14C23F4/00B01D71/82C08L65/04C08L25/06
CPCC08J7/12B29C59/14C23F4/00B01D71/82C08J2365/04C08J2325/06
Inventor 王玮李婷宇徐涵陈浪
Owner PEKING UNIV
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