公开(公告)号：US20230115147A1

公开(公告)日：2023-04-13

申请号：US17908845

申请日：2021-03-01

申请人： Purdue Research Foundation ,  United State, as represented by the Secretartary of Agriculture

发明人： Jeffrey Paul Youngblood ,  Sami Miguel El Awad Azrak ,  Gregory T. Schueneman ,  Robert John Moon

IPC分类号： C08L1/02 ,  C08J5/18 ,  D21J3/00 ,  D21H11/18 ,  D21H17/26

摘要： The present disclosure provides to a novel continuous processing method to prepare sheets comprising cellulose nanofibril (CNF) and carboxymethyl cellulose (CMC). Single screw extrusion was utilized to continuously process mechanically fibrillated cellulose nanofibrils (CNF) into sheets. Water-retention ability and stability of CNF suspensions containing different processing aids was assessed through centrifugation and zeta potential analysis. Subsequently, highly loaded pastes (up to ˜25 wt. % total solids content) containing the best performing processing aids (carboxymethyl cellulose (CMC), xanthan gum (XG), and anionic polyacrylamide (aPAM)) and CNF were prepared using a Brabender with Banbury mixer-head at a dry weight ratio of either 0.1 to 1 or 0.15 to 1, respectively. Validation of the mixing procedure proved that highly loaded CNF pastes can be processed in under 40 minutes, saving up to 40 days in preparation and drying time.