| dc.description.abstract | Use the Deposition Freezing Manufacturing(DFM) to fabricate the purposive structure of the scaffolds, we know the working temperature, the size of nozzle, the movement speed of nozzle, and the pressure of deposition will affect the quality of scaffold, to cause the scaffold collapsing, changing shape, and hard to control the pore size. So the study will confer and control these factors let the 3D scaffold can be accurately fabricated and solve the problem of the suspended in midair scaffold changing shape.
The study fixes the fabricating parameter to control the quality of material; to design a new cylindrical production platform to promote the low temperature production environment of large range and stable temperature to fabricate a scaffold high then 2.5cm; to observe the clotting speed of the deposition material knows the clotting speed at 6-10 seconds, the scaffolds will not effect warpage and collapse; to analyze the influence of the pressure and speed on fiber size, when the straight and turn speed ratio is 1:1.67, the straight and turn fiber size is the most close. And we try many kinds of water-soluble support materials to cooperate with two-nozzle spurting scaffold and support materials to fabricate the suspended in midair 3D scaffold of an inclined plane.
The improving of the process let the fabricating yield of 300 piece scaffolds be 90%. The structure and appearance of the scaffolds are more close the design model in advance, the fiber size error less than 3μm, the pore size is more close the design, so the scaffold moisture content is increasing.
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