Natural fiber reinforced epoxy resin composite material, preparation method thereof and application of natural fiber reinforced epoxy resin composite material in 3D printing

• Main Authors: DENG XIN, ZHOU YISHA
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2022
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; LAUNDERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; WORKING-UP

The invention belongs to the technical field of 3D printing, and particularly relates to a natural fiber reinforced epoxy resin composite material as well as a preparation method and application thereof in 3D printing. The preparation method comprises the following steps: in a vacuum environment, mixing alkali-treated natural fibers, isocyanate, an organic solvent and a silane coupling agent, and carrying out isocyanate-silane coupling agent combined modification reaction to obtain silane-isocyanate modified alkali-treated natural fibers; and mixing the silane-isocyanate modified alkali treated natural fiber, epoxy resin and an imidazole curing agent to obtain the natural fiber reinforced epoxy resin composite material. The natural fiber reinforced epoxy resin composite material prepared by the preparation method provided by the invention has better friction performance. 本发明属于3D打印技术领域，具体涉及一种天然纤维增强环氧树脂复合材料及其制备方法和在3D打印中的应用。本发明在真空环境中，将碱处理天然纤维、异氰酸酯、有机溶剂和硅烷偶联剂混合进行异氰酸酯-硅烷偶联剂联合改性反应，得到硅烷-异氰酸酯改性碱处理天然纤维；将所述硅烷-异氰酸酯改性碱处理