earticle

영어

Over a decade, cellulose based nanomaterials were hot research topics even cellulose is most useful biomass component for many applications. Last a few years, we have started to explore lignin based nano particles. However, the utilization of hemicellulose (typically 5-carbon sugars) is still the bottleneck of the current biorefinery industry. In this presentation after introducing our research in cellulose nanofibers, I will give an overview of our recent efforts: 1). Introducing hot-water extraction at relatively low temperature (120–180ºC) as an efficient pre-treatment strategy for the extraction of hemicellulose sugars from biomass as part of biorefinery process; 2) To utilize hemicellulose sugar stream, an effective hot-water pre-extraction and carbonization strategy of lignocellulosic biomass was introduced to synthesized fluorescent carbon dots (CDs) with tunable photoluminescence (PL) intensity and quantum yields (QYs) without carbonization of the entire biomass. No additional doping agent was used according to an innovative bio-refinery concept. The yields of de-branched sugars in hot-water extractions can be adjusted with increasing temperature between 120–180 ºC, thereby leading to distinct N-doping CDs after high temperature carbonization (220 ºC for 5 h); 3) Processing cellulose and lignin solid into lignin contained cellulose nanofibers and demonstrating a few unique applications such as superhydrophobic coating, nanodiamonds.