Clamp facilitating PDMS (Polydimethylsiloxane) die releasing and method for preparing PDMS layer thereby

Abstract

The invention discloses a clamp facilitating PDMS (Polydimethylsiloxane) die releasing and a method for preparing a PDMS layer thereby, and belongs to the technical field of polymer films. The clamp facilitating the PDMS die releasing comprises a bottom plate, an intermediate plate and a permanent magnet, wherein the bottom plate is manufactured through a paramagnetic metal; a groove is formed inthe upper surface of the bottom plate, and the depth of the groove is more than the thickness of the intermediate plate; a plurality of die releasing holes which are uniformly distributed around the groove extend from the groove to the inner wall of the bottom plate; the shape of the intermediate plate fits that of the groove in the bottom plate; the intermediate plate is positioned into the groove in the bottom plate, and the intermediate plate can cover the bottom surface of the groove and can also be moved out from the groove; the intermediate plate is manufactured through a ferromagnetic substance; and the permanent magnet is positioned at the rear part of the bottom plate and is used for attracting the intermediate plate to cling to the bottom surface of the groove in the bottom platethrough the surface. The invention also provides a method for preparing the PDMS layer through the clamp. The clamp is good in forming effect, and hard to break during die releasing; and the clamp isapplicable to PDMS layer manufacturing.

Description

technical field [0001] The invention relates to a jig that facilitates demoulding of PDMS and a method for preparing a PDMS layer by using the jig, belonging to the technical field of polymer films. Background technique [0002] Triboelectric nanogenerator (TENG) is a new type of self-powered device. Its principle is based on triboelectric effect and electrostatic induction effect. It can directly obtain various energy that can cause friction from the environment. The triboelectric effect is a kind of contact electrification effect, which means that after two materials are in contact and friction occurs, due to the different ability of the two materials to gain and lose electrons, the same amount of different charges will be generated on the contact surface, and the material with strong electron ability The surface will have a negative charge, and the surface of the material that has lost electrons will have a positive charge. Polydimethylsiloxane (PDMS) is usually selected...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that liquid PDMS easily infiltrates between the spacer mold and the bottom plate in the structure of the existing PDMS mold, resulting in poor molding effect, and it is difficult to take out the filled PDMS layer from the mold, and the problem that it is easy to break during the demoulding process, the present invention Provided is a fixture that is beneficial to PDMS demoulding and a method for preparing a PDMS layer using the fixture, and the adopted technical scheme is as follows:

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