Homogenerous Preparation Of Bagasee Nanocellulose By Dynamic High Pressure Microfluidization

Bagasse is one of the most abundant, renewable and biodegradable natural source. However, the utilization of bagasse was inadequately because of the compact structure formed by cellulose, hemicellulose and lignin. Extraction and nanotechnology of cellulose from bagasse was considered as an efficient way for its utilization.In the study, bagasse was pretreated by acid and alkali treatments to remove hemicellulose and lignin. Extracted cellulose was dissolved in the ionic liquid to form the clear homogeneous solution. Subsequently, a dynamic high pressure microfluidization (DHPM) was used to produce cellulose nanoparticles in the homogeneous solution. The optimal conditions of this process were confirmed, and the effect of certain factors on the particle size and structure was also investigated.The results are as follows:Bagasse was pretreated by3wt%HNO3and1.5wt%NaOH solutions with high purity of93.53%. In the case of dissolution step, the optimal condition was confirmed to be2wt%cellulose dissolved in ionic liquid at130℃with microwave power of500W, and the high regeneration ratio of cellulose was94.31%. Cellulose nanoparticle was prepared by DHPM, with smaller size of5-12nm and uniform distribution. According to the results of characterizations, the whole procedure was a physical treatment. However, the crystal structure of cellulose turned to be type II after regeneration accompanied with decreased crystallinity, and the thermal stability. At last, distilled water was used as regeneration solution for cellulose due to its low cost and high efficiency.DHPM was testified to be an effective technology for preparation of bagasse cellulose nanoparticles in the homogeneous media. It was benefit for industrialization of cellulose nanoparticle. Furthermore, it provides a new way for high-value application of bagasse as agriculture waste.