Hydroxyapatite (HA) coatings loaded with nanosilver particles is an attractive method to impart the HA coating with antibacterial properties. Producing Ag/HA coatings on porous Ti substrates have been an arduous job since commonly used line-of-sight techniques are not able to deposit uniform coatings on the inner pore surfaces of the porous Ti. In this study, porous Ti scaffolds with high porosity and interconnected structures were prepared by polymer impregnating method. A sol-gel process was used to produce uniform Ag/HA composite coatings on the surfaces of porous Ti substrates. Ca(NO(3) )(2) ·4H(2) O and P(2) O(5) in an ethyl alcohol based system was selected to prepare the sol, which ensured the homogeneous distribution of Ag in the sol. The characterization revealed that silver particles uniformly distributed in the coatings without agglomeration. High antibacterial ratio (>95%), against E. coli and S. albus was expressed by the silver-containing coatings (Ag/HA 0.8 and 1.6 wt %). The biocompatibility of the Ag/HA 0.8 surfaces was as good as that of pure HA surface, as revealed by culturing osteoblasts on them. The results indicated that Ag/HA 0.8 had the good balance between the biocompatibility and antibacterial properties of the coatings.

Most of polybenzoxazines suffer from intrinsic processability problems, while application of the conceptual strategy of reactive diluent remains challenge in benzoxazine field. Here, we reported a new methodology employing a mixture of styrene (St) and glycidyl methacrylate (GMA) as a reactive diluent to dissolve benzoxazine. A commercially available benzoxazine, bis(4‐(3,4‐dihydro‐2H‐1,3‐benzoxazine‐3‐yl))phenylmethane (PH‐ddm), was used as a model benzoxazine monomer for a variety of evaluation tests. GMA and St are capable of passing a robust radical polymerization to form linear copolymers, while offer epoxy groups to crosslink the PH‐ddm polymer resulting from the ring opening polymerization. Moreover, the benzoxazine mixture solutions show advantages in preparing composites with glass fibers. By comparing to bulk benzoxazine, the mixture solutions allow significant improvement in terms of tensile strength and elongation of the composites. The main contributor for the enhanced properties is their low‐viscosity nature and the capability to increase crosslinking density of the cured resin. The methodology presented here shows great potential for improving processability of benzoxazines, particularly in large‐scale manufacturing of composite.