Department of Materials Science and Engineering, Yonsei Universivty, 134 Shinchon-dong, Seoul, Korea.
Nanotechnology. 2009 Nov 4;20(44):445702. doi: 10.1088/0957-4484/20/44/445702. Epub 2009 Oct 5.
Macroporous carbon nanofibers with mesoscale surface openings were produced by electrospinning. During the electrospinning of polyacrylonitrile (PAN) solution including crosslinked polymer colloids, the polymer colloids were concentrated in the center of PAN fibers. Carbonization left interconnected spherical pores inside the carbon fibers and mesoscale openings in the fiber surfaces. The existence of surface openings facilitated inward diffusion of various solvent molecules, nanoparticles, and large molecules such as proteins. The porous fibers could be dispersed in both hydrophilic and hydrophobic solvents and materials, which enabled production of polymer composites in which the fibers and polymers were interpenetrating through the pores. Silica coating on the macroporous carbon fibers enriched the surface chemistry to effectively immobilize proteins helped by easy diffusion through surface openings.
通过静电纺丝制备了具有中尺度表面开口的大孔碳纳米纤维。在包含交联聚合物胶体的聚丙烯腈 (PAN) 溶液的静电纺丝过程中，聚合物胶体在 PAN 纤维的中心聚集。碳化在碳纤维内部留下相互连接的球形孔和纤维表面的中尺度开口。表面开口的存在促进了各种溶剂分子、纳米颗粒和大分子（如蛋白质）的向内扩散。多孔纤维可以分散在亲水性和疏水性溶剂和材料中，从而可以制备纤维和聚合物通过孔相互贯穿的聚合物复合材料。大孔碳纤维上的二氧化硅涂层通过表面开口的易于扩散来丰富表面化学，从而有效地固定蛋白质。
