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利用天然的细菌纤维素纳米纤维为模板,在温和条件下通过一步法合成得到了Au-BC复合纳米纤维,该复合纤维具有较好的机械强度、化学和热稳定性、优良的生物相容性。系统研究了溶液的pH值对Au-BC复合纤维形成的影响,并提出了影响机理。另外卤素离子对Au-BC的合成有较大影响,Cl-、Br-能使BC纤维上的Au纳米粒子包覆量有明显的增加,I-则不利于Au-BC的形成。通过测定Au纳米粒子的zeta电势,研究并提出了合理的卤素离子影响机理。
Using natural bacterial cellulose nanofibers as a template, the Au-BC nanofibers were synthesized by one-step method under mild conditions. The nanofibers have good mechanical strength, chemical and thermal stability, excellent biocompatibility . The effect of solution pH value on the formation of Au-BC composite fibers was systematically investigated and the mechanism of influence was proposed. In addition, halogen ions have a great effect on the synthesis of Au-BC. Cl- and Br- can significantly increase the coating amount of Au nanoparticles on BC fibers, while I- is not conducive to the formation of Au-BC. By measuring the zeta potential of Au nanoparticles, a reasonable mechanism of the influence of halogen ions was proposed.