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Film mechanical strength characterization method and device based on film passing pressure intensity test

A technology of mechanical strength and thin film, applied in the field of mechanical strength testing of thin films, can solve the problems such as the inability to effectively test the mechanical strength of thin films, and achieve the effect of reliable testing method and strong stability.

Active Publication Date: 2021-08-06
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art that the mechanical strength of films with low mechanical strength cannot be directly and effectively tested, and to provide a method and device for characterization of the mechanical strength of thin films based on the pressure test through the membrane

Method used

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  • Film mechanical strength characterization method and device based on film passing pressure intensity test
  • Film mechanical strength characterization method and device based on film passing pressure intensity test
  • Film mechanical strength characterization method and device based on film passing pressure intensity test

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Embodiment 1

[0034] This embodiment provides a method for detecting the mechanical strength of a thin film placed on a porous membrane through a membrane pressure testing device. The film has the characteristics of low mechanical strength and it is difficult to effectively test and characterize its mechanical strength. refer to figure 1 , with porous material (for example porous film) as carrier 1, described carrier 1 has relative upper surface and lower surface; placed in a closed channel. Specifically, the carrier 1 carrying the film 2 to be tested can be placed between the upper clamp 3 and the lower clamp 4 for sealing, the upper cavity 5 communicates with the film 2 to be tested through the upper clamp 3, and the lower channel 6 communicates with the carrier 1 through the lower clamp 4 The upper cavity 5 and the lower channel 6 are connected by the upper clamp 3 and the lower clamp 4 to form the aforementioned airtight channel whose conduction is determined by the carrier 1 and the ...

Embodiment 2

[0036] refer to figure 2, a thin film mechanical strength characterization device based on the membrane pressure test, comprising a first phase cavity 5, a second phase channel 6, a carrier porous membrane 1 and a syringe pump or a peristaltic pump 8; the first phase cavity 5 and the second phase The phase channel 6 is sealed and connected up and down to form a closed channel, and the porous membrane 1 is arranged at the junction of the first phase cavity 5 and the second phase channel 6 and separates the closed channel. Specifically, the porous membrane 1 can be sealed between the upper clamp 3 and the lower clamp 4, the first phase cavity 5 communicates with the upper surface of the porous membrane 1 through the upper clamp 3, and the second phase channel 6 communicates with the porous membrane 1 through the lower clamp 4. The lower surface of the membrane 1 communicates, and the pressure sensor is connected to the second phase channel 6 . The first phase cavity 5 is used ...

Embodiment 3

[0045] This embodiment utilizes the host-guest interaction between cyclodextrin and alkane, in figure 2 Films were grown in the setup shown and their mechanical strength was examined. The aqueous solution system in this embodiment can be α-cyclodextrin, β-cyclodextrin or γ-cyclodextrin, and the oil phase system can be dodecane, tetradecane or hexadecane, etc. The concentration of cyclodextrin can be 0.001 mol / L to 0.005 mol / L. The alkane is poured into the cavity 5 of the first phase, and the alkane contacts and diffuses with the upper surface of the porous membrane 1 . The aqueous solution of cyclodextrin is injected into the entire second phase channel 6 . In the second phase channel 6 , the cyclodextrin aqueous solution in the second phase channel 6 has a certain flow through the peristaltic pump, and the dextrin aqueous solution contacts and diffuses with the lower surface of the porous membrane 1 . The porous membrane 1 of this embodiment is made of hydrophilic, such ...

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Abstract

The invention discloses a film mechanical strength characterization method based on a film passing pressure intensity test. The method comprises the steps of by taking a porous material as a carrier, bearing a film to be tested on the first surface of the carrier, placing the carrier bearing the film to be tested in a closed channel, introducing fluid into one side, close to a second surface, of the closed channel, and detecting the film passing pressure intensity when the fluid passes through the carrier and destroys the to-be-tested film. The invention further provides an in-situ film mechanical strength characterization method and device. Aiming at the problem that a film with low mechanical strength is difficult to detect in a conventional mode, the film with low mechanical strength can be detected in a confinement space pressure testing mode, the testing method is reliable and high in stability, and obtained numerical values have comparability.

Description

technical field [0001] The invention specifically relates to the mechanical strength detection of thin films, and belongs to the technical field of new system device design and film detection. Background technique [0002] The common methods to characterize the mechanical strength of the film are: scanning electron microscope, which directly observes the thickness of the film; the load-bearing method, which tests the load-bearing capacity of the film by placing a weight on top of the film; modulus etc. However, for films with low mechanical strength, it is very likely that the film will be destroyed during the test operation using the above method, and it is difficult to detect and compare the mechanical strength of the film. [0003] In particular, for some skin-like films that have received widespread attention in recent years, these films are mostly biological films, usually less than 10 μm in thickness, and the main components are proteins, phospholipids, polymers, surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/02
CPCG01N3/12G01N3/02G01N2203/0019G01N2203/0048G01N2203/0298
Inventor 侯旭雷津美樊漪
Owner XIAMEN UNIV
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