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在分散有CoNiFe_2O_4磁性颗粒的壳聚糖溶液中,加入适量的戊二醛交联剂,制得内核为磁性CoNiFe_2O_4颗粒、外层包有壳聚糖的微米级磁性壳聚糖复合微球。用扫描电子显微镜、透射电子显微镜、红外光谱图、X射线衍射等方法对磁性壳聚糖微球的形态和组成特性进行分析。以CoNiFe_2O_4磁性壳聚糖作为驱油剂在油田进行驱油实验,结果表明,该驱油剂具有良好的驱油性能以及抗盐能力。
In the chitosan solution with dispersed CoNiFe 2 O 4 magnetic particles, a suitable amount of glutaraldehyde crosslinking agent was added to prepare micron-sized magnetic chitosan composite microspheres with magnetic CoNiFe 2 O 4 particles as its core and chitosan as its outer layer. The morphology and compositional characteristics of magnetic chitosan microspheres were analyzed by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy and X-ray diffraction. CoNiFe_2O_4 magnetic chitosan oil displacement agent in the oil displacement experiments showed that the oil displacement agent has good oil displacement performance and salt resistance.