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Comprehensive comparison of cellulose nanocrystal (CNC) drying using multi-frequency ultrasonic technology with selected conventional drying technologies

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Journal of Bioresources and Bioproducts 2024年第4期9卷 465-485页

作者： Junli Liu Amir Malvandi Hao Feng Department of Food Science and Human Nutrition University of Illinois Urbana-ChampaignUrbana 61801USA b Department of Agricultural and Biological Engineering Purdue UniversityWest Lafayette 47907USA Laboratory of Renewable Resources Engineering Purdue UniversityWest Lafayette 47907USA Department of Agricultural and Biological Engineering University of Illinois Urbana-ChampaignUrbana 61801USA College of Agriculture and Environmental Science North Carolina Agricultural and Technical State UniversityGreensboro 27411USA

Cellulose nanocrystals(CNCs)have garnered increased attention due to their renewable nature,abundant feedstock availbility,and good mechanical ***,one of the bottlenecks for its commercial production is the drying *** of the low CNC concentrations in suspension after isolation,CNC drying requires the removal of a large amount of water to obtain dry products for the following utilization and saving shipping costs.A novel multi-frequency,multimode,modulated ultrasonic drying technology was developed for CNC drying to improve product quality,reduce energy consumption,and increase production *** dried with dif-ferent drying technologies were characterized by Fourier transform infrared(FT-IR)spectra anal-ysis,X-ray diffraction(XRD)analysis,thermogravimetric analysis(TGA),differential scanning calorimetry(DSC),and redispersibility to measure the quality and property *** the same temperature and airflow rate,ultrasonic drying enhanced drying rates,resulting in at least a 50%reduction in drying time compared to hot air *** mean particle sizes of CNC from ultrasonic drying changed little with settling time,indicating good *** addition,ultrasonic dried CNCs exhibited good stability in aqueous solutions,with the zeta potentials rang-ing from-35 to-65 *** energy consumption and CO_(2) emissions of various CNC drying technologies were *** consumption of ultrasonic drying is significantly reduced compared to other drying ***,the potential CO_(2) emissions of the fully elec-trified ultrasonic drying could be net zero if renewable electricity is used.

关键词： Cellulose nanocrystals Ultrasound drying kinetics drying energy energy-efficient CO_(2) reduction Redispersibility Carbon sequestration

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