3D printing system and method for ordered gradient porous material

A 3D printing, gradient porous technology, applied in the field of additive manufacturing, can solve problems such as the inability to meet preparation requirements, achieve rich adjustability, achieve gradient distribution, and adapt to a wide range of effects

Active Publication Date: 2021-07-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current traditional techniques for preparing porous materials (direct template method, emulsion template method, foaming method, etc.) can only achieve uniform and random distribution of void structures, which cannot meet our needs for the preparation of biomimetic ordered porous structures, such as bone tissue. The distribution of cancellous bone and compact bone from the inside to the outside is actually a gradient distribution pattern in which the pore diameter and porosity gradually decrease from the inside to the outside. Compact bone with small pore size, low porosity and high mechanical properties

Method used

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  • 3D printing system and method for ordered gradient porous material
  • 3D printing system and method for ordered gradient porous material
  • 3D printing system and method for ordered gradient porous material

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no. 1 example 1

[0114] A more preferred first embodiment related to the method of the present application is as follows:

[0115] Matrix material preparation: mix 65vol% powdered calcium phosphate bone cement with 35vol% NaH 2 PO 4 the solution

[0116] (0.3ml / g) mixed evenly; reinforcement phase particles: mix the same amount of three specifications of polymethyl methacrylate microspheres (PMMA, 15μm / 100μm) evenly; add the sacrificial template particles into the matrix material three times and mix After uniformity, set aside;

[0117] Based on the predefined geometric model of the gradient ordered reinforcement material and the ordered gradient distribution mode of the internal reinforcement particles, the relevant three-dimensional model is established, and then the three-dimensional model is discretized;

[0118] Based on the gradient ordered distribution pattern of reinforced particles in the predefined material model, determine the motion code of the three-dimensional motion component...

no. 2 example 1

[0122] A more preferred second embodiment of the method related to the present application is as follows:

[0123] Matrix material preparation: mix 50vol% powdered calcium phosphate bone cement with 50vol% NaH 2 PO 4 The solution (0.5ml / g) is mixed evenly; Reinforcement phase particles: select rod-shaped sodium glutamate crystal particles of two specifications as pore-forming agents (the aspect ratio is 25, and the diameter is 5 μm / 10 μm); the rod-shaped glutamate The sodium crystal particles are added into the matrix material three times and mixed evenly, then set aside;

[0124] Based on the predefined geometric model of the gradient ordered reinforcement material and the ordered gradient distribution mode of the internal reinforcement particles, the relevant three-dimensional model is established, and then the three-dimensional model is discretized;

[0125] Based on the gradient ordered distribution pattern of reinforced particles in the predefined material model, determ...

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Abstract

The invention relates to the technical field of additive manufacturing, in particular to a 3D printing system and method for an ordered gradient porous material, and aims to solve the printing problem that a anisotropic gradient porous material in a single channel cannot be extruded through traditional 3D printing. The system specifically comprises a three-dimensional forming motion module, a digital ultrasonic auxiliary manufacturing system, a controllable pneumatic conveying module and a computer control system. The method comprises the steps of preparation of a printing material containing sacrificial template particles, ultrasonic-assisted additive manufacturing and aftertreatment. The gradient distribution of a directional pore structure in a single extruded filament from inside to outside during 3D printing can be realized, and the unique mechanical properties and physical properties of the filament have great application potential in the fields of tissue engineering and machinery.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a 3D printing system and method for ordered gradient porous materials. Background technique [0002] By building a porous structure, natural organisms can greatly reduce their own density while maintaining excellent mechanical properties (ie light weight, high strength, shock absorption, etc.), efficient heat insulation, and long-distance liquid transmission. For example, the hollow and porous hair structure of polar bears has extremely strong thermal insulation properties; the porous structure of plant rods provides capillary force for the directional transmission of water from bottom to top; the gradient porous structure of bone tissue from the inside to the outside has light weight and high strength. specialty. By imitating the ordered porous structure of biological materials, it is expected to provide important inspiration and help for the development of artif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/188B29C64/379B33Y30/00B33Y70/10B33Y40/20B29C64/40B33Y80/00
CPCB29C64/188B29C64/379B33Y30/00B33Y70/10B33Y40/20B29C64/40B33Y80/00
Inventor 周雪莉刘庆萍任雷任露泉韩志武李冰倩宋正义李桂伟吴千王振国何禹霖刘昊杨新宇
Owner JILIN UNIV
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