As more applications for nano-sized natural particles are discovered, simple, environmentally friendly ways to produce these particles become more important. This work prepares and characterizes nano-size bacterial cellulose particles using ultrasonication. Pellicle from nata de coco containing nanofibers was broken up in an electrical blender, then sonicated using an ultrasonic probe at 20 kHz and 3 watt/mL for 30, 60 and 90 min. Transmission electron microscope observations indicate the particles become nano-sized after 60 min ultrasound. The maximum decomposition temperature before sonication was 373 °C, decreased to 357 °C after 60 min ultrasonication. Moisture absorption of the 90 min sonicated particles film is 60% slower compared to non-sonicated particles. After ultrasonication, the crystallinity index of the cellulose decreases. The functional groups of non-sonicated and sonicated cellulose remain the same. This study promotes a potential method of fabrication of nano-sized particles from pure bacterial cellulose.

随着发现纳米级天然颗粒的更多应用，生产这些颗粒的简单，环境友好的方法变得越来越重要。这项工作使用超声波制备并表征了纳米级细菌纤维素颗粒。薄皮从椰果将含有纳米纤维的纳米纤维在电动搅拌器中破碎，然后使用超声探头以20 kHz和3 watt / mL的频率超声处理30、60和90分钟。透射电子显微镜观察表明，在60分钟的超声作用下，颗粒变为纳米级。超声处理前的最高分解温度为373°C，超声处理60分钟后降至357°C。与未超声处理的颗粒相比，超声处理90分钟的颗粒膜的吸湿速度要慢60％。超声处理后，纤维素的结晶度指数降低。未超声处理和超声处理的纤维素的官能团保持相同。这项研究促进了一种由纯细菌纤维素制造纳米级颗粒的潜在方法。