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In this study, a circular porous 5-fluorouracil/ultrahigh-molecular-weight-polyethylene (5-FU/UHMWPE) scaffold with different 5-FU concentration was fabricated using fused deposition molding (FDM) 3D printing technology. In vitro cytotoxicity experiments indicated that 5-FU/UNMWPE scaffold has a high inhibitory effect on 4T1 breast cancer cells together with less toxic damage to normal cells. In vivo Animal experiments revealed that 5-FU/UHMWPE scaffold can effectively treat mice with breast cancer cells 4T1. The tumor inhibition rate of 0.5% 5-FU/UHMWPE scaffold, 3.0% 5-FU/UHMWPE scaffold and injecting groups were 54%, 71% and 92%, respectively. Although the tumor inhibition rate of the scaffold group was smaller than the 5-fu-injection group, anatomical analysis showed that there was no obvious drug toxicity in the heart, liver, spleen, lung and kidney of the scaffold groups. These implantable scaffolds ensure a long-term therapeutic drug level near the tumor site while minimizing the drug's exposure to normal tissues. These results suggested that 3D printed porous 5-FU/UHMWPE scaffolds could be a potential drug delivery system in cancer treatment.

Low-cost catalysts synthesized by the green chemistry approach have increasing potential applications for removing toxic organic dyes in wastewaters due to the expense consideration and the preference for environmentally compatible materials. In this study, copper nanoparticles (Cu NPs) were successfully prepared through a facile and green method, using the solution of green coffee bean extract as a reducing and stabilizing agent and the green synthesis takes only one step. Experimental results show that the synthesized Cu NPs exhibited excellent stability. The average particle sizes of as-synthesized Cu NPs were 5–8 nm. In the process of reducing amido black 10B (AB-10B), methylene blue (MB), and xylenol orange (XO), we found Cu NPs are effectively catalysts when sodium borohydride (NaBH4) was used as the reducing agent. Then, Cu/green coffee bean powder composites (Cu/GP C) were synthesized in one step to overcome the difficulty to recover Cu NPs in aqueous solution and we used Cu/GP C as a simple simulated catalytic bed for rapidly and efficiently reducing the methylene blue for multiple times. Cu/green coffee bean powder composite (Cu/GP C) could be used as an efficient and easily recyclable catalyst for reduction of organic dyes in industrial wastewaters due to its excellent catalytic activity, low-cost, and reusability.