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A 3D printed protective material with high negative Poisson's ratio interwoven structure

A technology of protective material and negative Poisson's ratio, which is applied in the field of new 3D printing protective materials of interwoven structures with high negative Poisson's ratio, to achieve good buckling strength, good attenuation characteristics, and good vibration isolation and sound insulation performance.

Active Publication Date: 2021-08-03
伊诺维(无锡)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct 3D printing of negative Poisson's ratio materials has not yet been achieved.

Method used

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  • A 3D printed protective material with high negative Poisson's ratio interwoven structure
  • A 3D printed protective material with high negative Poisson's ratio interwoven structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] refer to figure 1 , use 3D-printable common material (silica gel) with good tensile properties on the straight line, use bisphenol F epoxy acrylate resin (containing thinner TPGDA, photoinitiator BDK) for triangular nodes, and use CAD to precisely design Produce the structure (the design parameter is that the center distance of the circumscribed circle of the triangle is 10mm, and the side lengths of the triangle are respectively 1mm, 2.5mm, and 4mm), and use 3D printing technology to form a complete composite structure with a high negative Poisson's ratio structure; finally By using ABAQUS software to test its mechanical properties, it is concluded that the Poisson's ratio of the high negative Poisson's ratio structure combined with shape memory materials can reach -0.6, and it has high specific strength, large specific modulus, and good fatigue resistance. The tensile strength is high, but at the same time the elongation at break has a certain decrease. At the same ti...

Embodiment 2

[0027] refer to figure 1 , use 3D-printable ordinary materials (rubber) with good tensile properties in the straight line, pentaerythritol triacrylate resin is used in the triangle nodes, and the structure is precisely designed by using CAD (the diameter of the inscribed circle of the triangle is 10mm, 15mm, 20mm ,), use 3D printing technology (object's connex series) to form a complete composite structure with a high negative Poisson's ratio structure at the same time; finally, by using ABAQUS software to test its mechanical properties, it is concluded that the shape memory The Poisson's ratio of the high negative Poisson's ratio structure combined with materials can reach -0.6.

[0028] The pentaerythritol triacrylate resin uses toluenesulfonic acid as a catalyst, adopts a polymerization inhibitor PMT, a decolorizing agent TSJ-1, and the amount of the catalyst is 4% of the quality of pentaerythritol, and the addition of the polymerization inhibitor is 4% of the quality of ac...

Embodiment 3

[0031] In the same way as in Example 2, the present embodiment adopts the modified octadecyl acrylate at the triangular node, which is the monomer octadecyl acrylate, crosslinking agent propoxylated neopentyl glycol diacrylate and diluted The photoinitiator is prepared by reacting under the action of a photoinitiator; the photoinitiator is a benzoin ether-sulfur salt initiator (6wt%); the mass ratio of the monomer to the crosslinking agent is 1:0.18.

[0032] By using ABAQUS software to test its mechanical properties, it is concluded that the Poisson's ratio of the high negative Poisson's ratio structure combined with the shape memory material can reach -0.53.

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Abstract

The invention discloses a novel 3D printing protective material with a high negative Poisson's ratio interweaving structure. The protective material is made of shape memory material and ordinary rubber, which is printed and formed by the micro-droplet injection additive manufacturing technology; the structure of the protective material Triangular structures (1) are evenly distributed, and the triangular structures (1) connect the nodes of the triangles through straight line structures (3); adjacent straight line structures (3) form non-closed hexagonal structures. The invention utilizes 3D printing technology to 3D print objects with excellent characteristics such as memory, response, recovery, shock resistance and adaptability through temperature stimulation of the improved photosensitive material.

Description

technical field [0001] The invention relates to the technical field of protective materials, in particular to a novel 3D printed protective material with a high negative Poisson's ratio interwoven structure. Background technique [0002] At present, negative Poisson's ratio materials have been used in safety protection. Chinese utility model patent specifications CN206336247U and CN206782464U respectively disclose a car energy-absorbing box filled with a negative Poisson's ratio structure and an energy-absorbing anti-fall packing box based on a negative Poisson's ratio material. These two patents are protective materials made of energy-absorbing properties of negative Poisson's ratio materials. But the problem is that it is difficult to achieve a high negative Poisson's ratio (NP<-0.5), the reason is not only the structure, but also the material for making a high negative Poisson's ratio structure; [0003] At present, it is difficult to 3D print a soft material with a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08F291/02C08F222/14C08F220/18B33Y70/00B33Y80/00
Inventor 肖学良胡雨洁方镁淇贺燕贺录祥王鸿鹏
Owner 伊诺维(无锡)新材料科技有限公司
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