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Donghua University 3D Printing Thermosetting Materials Research Obtained Important Results
Dec 10, 2018

How to make the cutting edge of 3D technology and manage thermosetting material, in which may kinds of 3D printing materials at the same time increased the thermosetting material design and manufacture?The YouZhengWei team proposes a novel strategy, they cleverly combines prepolymer of sand and thermosetting material for 3D printing "composite ink", a grain in the process of 3D printing have the effect of thickening agent, print to ensure smooth;At the same time in the process of heat curing, sand and have the effect of strengthening agent, achieve print three-dimensional structure under high temperature and high vacuum crosslinking process mediator shape;In the printing process of sand after curing, sand water can be easily dissolved out, and again as the pore to obtain the porous structure.

YouZhengWei said that the strategy has good generality and can achieve a variety of thermosetting materials such as crosslinked polyester, polyurethane, epoxy resin of direct extrusion type 3D printing, print out the structure also has a regular porous 3D printing is difficult to obtain.

Paper, according to the first author, donghua university doctoral redon add salt was inspired by material that is commonly used in civil engineering concrete, cement mixed with certain proportion of gravel, sand, such as filling material used to reinforce the support structure, improve the compressive strength.From inspiration to produce to applied in the experiment, redon, says team member didn't spend less effort, to salt particle size, distribution methods and proportion, print temperature, the rate of repeated experiments were carried out a number of parameters, such as, in order to reach optimization to the best effect of the experiment.

It is reported, the researchers in thermosetting elastomers, for example, to carry out the relevant application research.Use print elastomer on large size of the solvent swelling effect and microporous structure and efficient adsorption and desorption effect, build the response of gas sensor can be repeated cycle.Using the advantage of 3D printing custom gradient structure to build the flexible solvent drive, solvent for instant response and deformation of large scale, in areas such as software robots has potential application prospect.

At the same time, the group and ruijin hospital affiliated to Shanghai jiaotong university, professor zhao jiang and ye of doctor of vice director of the team cooperation, confirm the printed by adopting the technique of thermosetting three-dimensional porous scaffolds have good mechanical strength, elasticity and fatigue resistance, and can be used as a cardiac muscle patch and effective treatment of myocardial infarction model in rats.The stent has good biocompatibility and degradability, 3D printing custom according to individual demand, the future can also and drug compound, realize the slow release of drug, for the regeneration of disease treatment and tissue defect repair provide personalized new scheme.