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The election of bone tissue engineering scaffolds material is mainly based on the bionics of natural bones. Although the content of trace elements in bone is low, the lack of them affects the growth and metabolism of bones, thus increasing the risk of orthopedic diseases caused by the deterioration of bone quality. Therefore, inspired by trace elements in natural bone, biodegradable polymer composite scaffolds doped with bioactive metals such as Mg, Zn, Sr, Fe, Cu, Mn, Co, Li, Ag, Nb, and V have attracted more attention. Herein, the role of bioactive metals doping in biodegradable polymer matrix is mainly reviewed, including improving hydrophilicity, preventing aseptic inflammation caused by acidic degradation products, imparting antibacterial activity, improving mechanical properties, and promoting vascularization of polymer scaffolds. Then, the reasons and solutions for interfacial bonding and cytotoxicity caused by doping bioactive metals are focused on.

We used hexadecyl trimethyl ammonium bromide as a phase transfer catalyst (PTC) to enhance the effectiveness of a heterogeneous reaction system composed of collagen fiber (CF) and organosilicone modifying agents including epoxy-polydimethylsiloxane (ES) and/or g-glycidoxypropylthrimethoxysilane (GS), in order to improve oil sorption behaviors of the modified products as sorbents. The effects of PTC dosage, organosilicone species or its dosage on the degree of modification of CFs were studied, and the optimum conditions were determined. Subsequently, the surface chemistry and porous structure of the prepared sorbents were thoroughly characterized, and their oil sorption behaviors were also investigated. It was confirmed that both their hydrophobicity-oleophilicity character and pore structures could be significantly improved by introducing PTC agent and modulating the species or amount of organosilicone, resulting in improved oil sorption behaviors. In addition, the organosilicone modified CF matrix possessed acceptable reusability and biodegradability, and can be implemented as an eco-friendly sorbent for oil spill cleanup. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46264.

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