A kind of plant fiber composite wire material with shape memory function and preparation method thereof for 3D printing

Abstract

The invention belongs to the technical field of 3D printing and in particular relates to a 3D printing plant fiber composite wire with a shape memory function and a preparation method of the 3D printing plant fiber composite wire. The plant fiber composite wire comprises raw materials: plant fiber powder, TPU, a modifier and a lubricant. The preparation method comprises the preparation steps as follows: carrying out melt extrusion on a material obtained by sufficiently mixing the plant fiber powder, TPU, the modifier and the lubricant by using a parallel double-screw extruder, then, smashing the material to form aggregates; placing the aggregates into a single-screw extruder, melting the aggregates at a certain temperature, and dragging the molten aggregates at a certain speed to obtain the melted deposition type 3D printing plant fiber composite wire. By using the 3D printing plant fiber composite wire, the problem of relatively high cost caused by adopting a thermoplastic polyurethane elastomer as a 3D printing material is solved, not only is the material cost reduced, but also the interfacial compatibility between TPU and the plant fiber powder is improved by modifying TPU and the plant fiber powder, so that the prepared composite wire has relatively strong toughness and shape memory restorability.

Description

technical field

[0001] The invention belongs to the technical field of 3D printing, and in particular relates to a plant fiber composite wire for 3D printing with a shape memory function and a preparation method thereof. Background technique

[0002] At present, the importance of 3D printing technology has been verified and widely used in industry. Among many 3D printing technologies, Fused Deposition Modeling (FDM) technology is the most common. Its equipment has simple structure, low price, and convenient operation process. The printing process is to melt thermoplastic filamentary materials from the heating nozzle and extrude them according to the designed trajectory. to construct 3D solids.

[0003] Based on the characteristics of FDM technology, this technology can print a variety of thermoplastic materials and their composite materials, but it is rarely able to manufacture soft structural products with arbitrary complex shapes. Obviously, proposing more new composite ...

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