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Gripping device for testing pull-power property of low intensity hydrogel

A clamping device, hydrogel technology, applied in the direction of measuring device, strength characteristics, using repeated force/pulsation force to test the strength of materials, etc., can solve the problem of affecting the authenticity of mechanical properties test results, difficult to predict and control penetration depth, Problems such as local stress concentration at the bonding place, to achieve the effect of easy production and promotion, wide application range, and avoidance of stress concentration

Inactive Publication Date: 2017-01-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, due to the thickness of the cyanoacrylate glue coating layer, its penetration depth in the hydrogel sample is difficult to predict and control, and it is easy to cause local stress concentration at the bond and damage from the bond; secondly, use a tool to process the hydrogel When glueing samples, scratches and tiny wounds will be formed on the cutting surface. For low-strength hydrogels, these surface defects will directly affect the authenticity of the mechanical property test results
In addition, before and after each experiment, the fixture needs to be cleaned to remove cyanoacrylate (usually using organic solvents), which is a cumbersome, time-consuming and laborious process

Method used

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  • Gripping device for testing pull-power property of low intensity hydrogel
  • Gripping device for testing pull-power property of low intensity hydrogel
  • Gripping device for testing pull-power property of low intensity hydrogel

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] A clamping device for testing low-strength hydrogel tensile mechanical properties, the clamping device includes a self-made dumbbell-shaped mold, fixture A and accessory parts, or includes a dumbbell-shaped mold, fixture B and accessory parts; considering cost factors , the dumbbell-shaped mold, fixture A and fixture B are all made of aluminum alloy.

[0035] The two halves of the dumbbell-shaped mold are symmetrically snapped together, such as image 3 As shown in the cross-sectional view of the dumbbell-shaped mold, both sides of the upper and lower parts of the two halves of the dumbbell-shaped mold have flat plates with holes in the middle. After the two halves of the mold are symmetrically fastened, insert bolts into the holes to tighten , to fix the mold. The middle part of the dumbbell-shaped mold is a hollow cylinder, and its length is 6 times of the i...

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Abstract

The invention belongs to the technical field of functional macromolecule and experimental mechanics, and provides a gripping device for testing pull-power property of low intensity hydrogel. The device includes a dumbbell shaped mould, a gripping device A applied to a reciprocally moving testing machine and accessories thereof, or includes a dumbbell shaped mould, a gripping device B applied to a reciprocally moving testing machine and accessories thereof; different gripping devices correspond to different accessories. The reciprocally moving testing machine applies static, dynamic load to hydrogel samples, and finishes curve measurement for power and displacement. The present invention has the effects and benefits that the pull provided by the gripping device when pulling to the gripping head of hydrogel samples, replaces in the original method the adhesive force of using glue, whose main component is cyanoacrylate, to stick the hydrogel sample on the gripping device. The present invention enhances the measurement accuracy for the pull-power property of low intensity hydrogel. The device has strong controllability, operates conveniently and fast, and is simple for production and promotion.

Description

[0001] Technical field [0002] The invention belongs to the technical field of functional polymer materials and experimental mechanics, and relates to the mechanical properties of hydrogels, in particular to a clamping device and method for testing the tensile mechanical properties of low-strength hydrogels. Background technique [0003] Hydrogel is a kind of polymer with a three-dimensional network structure, which can absorb a large amount of water and swell in water, and can continue to maintain its original structure without being dissolved after swelling. Through the precise design of the physical and chemical properties and biological properties of the hydrogel, the hydrogel has biocompatibility, bioadhesion, biodegradability, controllable mechanical properties and drug sustained release characteristics, which can be highly simulated in vitro The natural extracellular matrix environment reasonably regulates the life activities of cells and the process of tissue regenera...

Claims

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Application Information

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IPC IPC(8): G01N3/32
CPCG01N3/32G01N2203/0005G01N2203/0017G01N2203/04G01N2203/0676G01N2203/0682
Inventor 随静萍张润润张伟马建立吴承伟
Owner DALIAN UNIV OF TECH
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