基于甲基乙烯基醚—馬來酸交替共聚物智能水凝膠的制備及性能研究
[Abstract]:In order to meet the needs of biomedical research and achieve application, intelligent hydrogels with various functions need to be developed. Intelligent hydrogel has become one of the hot spots in the field of biomedicine because of its wide application prospect. Four kinds of intelligent hydrogels based on P (MVE-MAA-MA) were prepared by different methods, and the physical and chemical properties of these intelligent hydrogels were studied systematically. The main content includes: 1. Preparation and stimulation response of P (MVE-MAA-MA)-g-MAA-CD/ P (MVE-MAA-MA)-g-Azo supermolecular hydrogels. The cyclodextrin derivatives (EDA-6-MAA-CD) were first grafted onto P (MVE-MAA-MA) by a chlorosulfonation reaction to obtain a bulk polymer P (MVE-MAA-MA)-g-AZO-CD; followed by grafting of p (MVE-MAA-MA) to P (MVE-MAA-MA) by a chlorosulfonation reaction to give the guest polymer P (MVE-MAA-MA)-g-Azo. Finally, at room temperature, the main polymer P (MVE-aIt-MA)-g-MAA-CD aqueous solution was mixed with the guest polymer P (MVE-MAA-MA)-g-Azo aqueous solution, and P (MVE-MAA-MA)-g-MAA-CD/ P (MVE-MAA-MA)-g-Azo supermolecular hydrogels were formed by the complexation of p-CD on the main chain and the Azo main-guest. The ultra-molecular hydrogel exhibits a porous structure in communication with each other and a rheological property which is easy to adjust, and has light responsiveness and pH responsiveness. Using CCK-8 to detect the toxicity of hydrogel on SKOV3 cells in human ovarian cancer cells, the results showed that the supermolecular hydrogel had no obvious cytotoxicity. Laser scanning confocal microscopy was used to observe the distribution of SKOV3 cells stained by DiO in different depths inside the hydrogel. SKOV3 cells cultured in the hydrogel for a period of time were successfully desorbed by UV irradiation of the hydrogel to the sol, and SKOV3 cells separated from the hydrogel remained viable. This cell separation study lay an experimental and theoretical foundation for cell-based follow-up study of P (MVE-MAA-MA) intelligent hydrogel. Preparation and stimulation response of P (MVE-MAA-MA)-g-MAA-CD/ P (MVE-MAA-MA)-g-Ad supermolecular hydrogels. At first, LiH is used as the reaction additive to graft the MO-CD to P (MVE-MAA-MA) through esterification reaction to obtain the main polymer P (MVE-MAA-MA)-g-MAA-CD; followed by DCC as the catalyst, and the adamantane ethylamine (Ad) is grafted to P (MVE-MAA-MA) through the esterification reaction to obtain the guest polymer P (MVE-MAA-MA)-g-Ad. Finally, at room temperature, the main polymer P (MVE-MAA-MA)-g-MAA-CD aqueous solution was mixed with the guest polymer P (MVE-MAA-MA)-g-Ad aqueous solution, and P (MVE-MAA-MA)-g-MAA-CD/ P (MVE-MAA-MA)-g-Ad supermolecular hydrogels were assembled by the ligation and complexation of CdSe-CD on the main chain and Ad. The super-molecular hydrogel has a pH value response and a self-healing property. The hydrogel is demonstrated to have good biocompatibility and can be used as a cell three-dimensional culture scaffold. This study provides a new approach and new material for the preparation of functional cell three-dimensional culture scaffold. Preparation and Properties of P (MVE-MAA-MA)/ CS Composite Nanogels The polyelectrolyte complex is first formed by electrostatic interaction with the amino groups in the chitosan (CS) in P (MVE-MAA-MA), and then the nanogel is obtained by the formation of the aldehyde groups in the aldehyde groups in the cross-linking agent glutaraldehyde (GA) and the amino groups in the CS. the nanogel has a ph sensitivity. In vitro drug release behavior of the nano-gel was studied by using adriamycin as a model drug. In vitro drug release experiments showed that the nanogel was expected to be used as a drug carrier. Preparation and properties of P (MVE-MAA-MA)-Crosslinked-Sepharose hydrogel. A P (MVE-MAA-MA)-Crosslinked-Sepharose hydrogel was prepared by chemical crosslinking with EDC/ MAA as catalyst. The hydrogel has the sensitivity of pH value, has no obvious cytotoxicity to the cells under suitable concentration conditions, and the cell can be well proliferated in the hydrogel, and is expected to be used as a cell culture support. The research work provides a foundation for the preparation of natural polymer and synthetic polymer composite hydrogel and its application in three-dimensional culture of cells. In general, this work prepares a series of intelligent hydrogels based on P (MVE-MAA-MA). This intelligent hydrogel can provide a powerful platform for biomedical research applications, especially in three-dimensional cell culture.
【學(xué)位授予單位】:東南大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2016
【分類號】:R943
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