Precise molding method of biomimetic micro-channel system based on plant veins

A micro-channel and leaf-vein technology, which is applied in the field of precise forming of bionic micro-channel systems based on plant leaf veins, can solve the problems of affecting the structural performance of the micro-channel system, expensive, etc. Effect

Inactive Publication Date: 2013-02-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing manufacturing methods of microfluidic systems mainly include photolithography, soft imprinting, laser etching, direct writing assembly, etc., but most of these methods require expensive special forming equipment and skilled operation skills
At the same time, due to the complexity of the natural microvascular

Method used

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  • Precise molding method of biomimetic micro-channel system based on plant veins
  • Precise molding method of biomimetic micro-channel system based on plant veins
  • Precise molding method of biomimetic micro-channel system based on plant veins

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Effect test

Embodiment 1

[0022] A method for precisely forming a bionic microfluidic channel system based on plant leaf veins, comprising the following steps:

[0023] 1) Prepare 7% sodium hydroxide aqueous solution and 5% sodium bicarbonate aqueous solution respectively, mix the two solutions evenly according to the volume ratio of 1:1, and pick fresh laurel leaves with hard leaves and clear veins , put the leaves of osmanthus osmanthus into the mixed solution and heat it to boiling, take it out after 15 minutes and wash it in water, and use a brush to completely peel off the mesophyll part, flatten and dry in an oven at 50°C to obtain a complete leaf vein structure, and then remove the leaf veins sputtering a layer of the first metal chromium film with a thickness of 400 nanometers on the surface of the structure to obtain a vein mask;

[0024] 2) Add the hexamethyldisilazane tackifier dropwise on the surface of the silicon wafer, spin coat it at a speed of 1000 rpm for 10 seconds, let it stand at 9...

Embodiment 2

[0032] A method for precisely forming a bionic microfluidic channel system based on plant leaf veins, comprising the following steps:

[0033] 1) Prepare 7% sodium hydroxide aqueous solution and 5% sodium bicarbonate aqueous solution respectively, mix the two solutions evenly according to the volume ratio of 1:1, and pick fresh mulberry leaves with hard leaves and clear veins, Put the mulberry leaves into the mixed solution and heat it to boiling. After 10 minutes, take it out and wash it in water, and use a brush to completely peel off the mesophyll. After flattening and drying at room temperature, a complete leaf vein structure is obtained, and then sputter on the surface of the leaf vein structure A first metal chromium thin film with a thickness of 300 nanometers to obtain a vein mask;

[0034] 2) Add the hexamethyldisilazane tackifier dropwise on the surface of the transparent glass sheet, spin coat it at a speed of 1000 rpm for 10 seconds, let it stand at 95°C for 15 min...

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Abstract

The invention relates to a precise molding method of a biomimetic micro-channel system based on plant veins. According to the invention, leaf mesophyll parts are removed, such that a leaf vein structure is obtained; a metal film is sputtered on the surface of the leaf vein structure, such that a vein mask is obtained; with a mask light curing technology, the vein mask is transferred onto a photoresist adhered to the surface of a glass plate or a silicon wafer; development is carried out, and a photoresist vein structure is obtained; a metal film is sputtered on the surface of the photoresist vein structure; the material is placed in an organic solvent, such that a metal film mask layer is formed on non-vein areas; a vein channel silicon mold or resin mold is manufactured; and a silicone rubber mold with a vein channel structure negative shape is cloned; and the silicone rubber mold is adopted as a template, such that complicated biomimetic vein micro-channel structures can be precisely duplicated on various materials. With the method provided by the invention, defects such as easy deformation, easy damage, and unsuitability for situations with high temperatures of a method for directly utilizing natural plant veins as a mold are overcome, and a possibility is provided for manual modification of natural vein structural performance.

Description

technical field [0001] The invention relates to the technical field of bionic manufacturing of complex microfluidic channel systems, in particular to a precise forming method of a bionic microfluidic channel system based on plant leaf veins. Background technique [0002] Many living organisms in nature are rich in complex microvascular networks such as plant leaf veins and animal vascular networks, which structurally ensure the effective transmission of nutrients, water, oxygen and other substances in the living body, which is crucial to maintaining the activity and function of living organisms important. At present, research on the construction of artificial functional components such as self-healing materials, complex microfluidic devices, and biological tissue and organ scaffolds by simulating the microvascular network inside natural living bodies has become a frontier and hot spot in the field of bionic manufacturing in the world. The existing manufacturing methods of m...

Claims

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Application Information

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IPC IPC(8): B81C1/00
Inventor 贺健康李涤尘刘亚雄邵金友毛矛连芩靳忠民
Owner XI AN JIAOTONG UNIV
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