血红蛋白基纳米微囊表面物质传递行为的研究

表面三维结构是影响血红蛋白基纳米微囊表面物质传递行为的重要因素.本研究采用改性复乳法工艺制备血红蛋白基纳米微囊血代品,以具有不同分子量大小的PEG分子为探针,考察制备过程中不同工艺条件对微囊表面三维结构影响的规律.结果表明,在二氯甲烷中引入乙酸乙酯、丙酮等亲水性溶剂可有效调控微囊表面孔的大小.随着亲水性溶剂比例的增加,微囊表面的孔径先增大再减小;外水相体积的增加、溶剂挥发时间的延长以及随着搅拌速率的加快均会增加微囊的孔径,而油相体积的增加和聚合物的PEG改性均会减小微囊表面的孔径.

Study on Mass Transfer Behavior of Hemoglobin-based Nanocapsule Surface

Three dimensional structure of the surface is an important factor that influences the mass transfer behavior of hemoglobin-based nanocapsule surface. In this paper, the modified double emulsion method was used to fabricate the blood substitute of hemoglobin-based nanocapsules, and with the use of different molecular weight of PEG as probes, the effects of different technical conditions (such as primary emulsion, double emulsion, polymer, solvent, et al) in the processing on the three dimensional structure of the nanocapsule surface were investigated in details. Researches indicated that the water-soluable solvent, such as ethyl acetate and acetone could effectively modulate the pore size of the nanocapsule surface. With the increasing of the ratio of water-soluble solvent, the pore size of the nanocapsules firstly increased and then decreased. The increasing of the extra-water volume, the prolongation of the solvent evaporation time, and the improvement of the stirring speed resulted in a bigger pore size, but the increasing of the solvent volume and PEG polymer could reduce the pore size of nanocapsule surface.