靜電紡絲法制備復(fù)合生物纖維膜及其性能研究
[Abstract]:The application of electrospun fiber to the preparation of composite fiber membranes has become a hot trend in the development of modern medical technology. In this paper, different composite fiber membranes were prepared by electrostatic spinning technology and the biological and drug transport properties were studied. Poly Sanya methyl carbonate (PTMC), gelatin (Gt) and modification were used. Hydroxyapatite nanoparticles (OA-HA) were blended and electrospun composite fiber membranes were used as scaffolds to simulate human cartilage tissue. By using poly (PLLA), modified hydroxyapatite nanoparticles (OA-HA) and fluorescent molecule Luo Danming B (RhB) were electrospun by emulsion. The preparation of nuclear shell structure nanofibers was used to simulate the use of drug controlled release.1.. PTMC/Gt, PTMC/Gt/HA and PTMC/Gt/OA-HA composite fiber engineering scaffold.HA is one of the components of human bone, which has excellent performance in inducing bone growth and bone conduction. However, it is found that the aggregation phenomenon is easy to occur because of the interaction between HA nanoparticles, and it is dispersed when blended with polymer materials. The morphology of the fiber was greatly affected and the physical and chemical properties and biological properties of the composite fiber scaffold were greatly reduced. The surface modification of oleic acid was carried out in this paper to improve the dispersion and uniformity of the HA nanoparticles in the polymer materials. The XRD and FTIR characterization methods were used to prove that the surface of HA was modified by surface modification. While the original crystal structure and chemical composition are still maintained, the surface morphology of the fiber is greatly improved when the OA-HA nanoparticle blend polymer materials are electrospun. The fiber diameter is uniform and the OA-HA nanoparticles are evenly distributed on the surface. No massive aggregate.2. has been tested for the physical and chemical properties of the three kinds of composite fiber membranes, and HA The addition of nano particles and OA-HA nanoparticles can improve the hydrophilic.PTMC/Gt/OA-HA composite fiber membrane of the PTMC/Gt composite fiber membrane with more excellent mechanical properties, and the components in the composite fibers still maintain their original chemical properties, and their excellent physical and chemical properties are played in the composite fibers. The three kinds of composite fibers are used in the composite fibers. The membrane was tested by biological test. The PTMC/Gt composite fiber membrane showed good cell adhesion at the first day (the first day). With the prolongation of cell culture time, the PTMC/Gt/HA and PTMC/Gt/OA-HA composite fibrous membrane showed excellent performance in promoting cell proliferation. From the point of view of long-term tissue repair, the composite fiber membrane of PTMC/Gt/HA and PTMC/Gt/OA-HA The PLLA fiber membrane containing fluorescent molecule RhB was prepared by traditional electrospun and emulsion electrospun with more excellent biological properties.3.. The distribution of RhB in two fibers was observed by laser confocal microscopy. The experiment showed that in the fibers prepared by the traditional electrospun fiber, RhB was distributed inside and on the surface of the fiber, and the emulsion was in the emulsion. RhB in the fibers prepared by electrospun is only distributed inside the fiber and forms the core layer. It shows that the core shell fiber can be prepared by the emulsion electrospun, and the nuclear shell structure is shown by the laser confocal microscope image. The high rate of high rate.4. is electrospun by emulsion and the base of the original RhB-PLLA core shell structure fiber. On the base, OA-HA nanoparticles with different content are added to the shell. Through the mechanical properties and contact angle, the addition of OA-HA nanoparticles helps to improve the mechanical and hydrophilic properties of the RhB-PLLA fiber membrane. More importantly, the degradation rate of the OA-HA nanoparticles is higher than that of the PLLA, and the degradation of the OA-HA nanoparticles in the nuclear layer will lead to the degradation of the nanoparticles. There is vacancy in the shell structure of the shell structure, and the RhB molecules are released through the vacancy, and the release rate of the RhB molecules is accelerated with the increase of the content of the shell OA-HA nanoparticles. This phenomenon indicates that the release rate of the RhB molecules can be controlled by controlling the addition of the shell layer OA-HA nanoparticles, and the controlled release of the drug can be realized.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TQ340.64
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