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公开(公告)号：US20190093288A1
公开(公告)日：2019-03-28
申请号：US16086988
申请日：2017-03-21
Applicant: University of Maine System Board of Trustees
Inventor： Michael Darin Mason , David Gregg Holomakoff , Muhammad Radowan Hossen
Abstract: The present invention provides, inter alia, biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF), CNC, or bacterial cellulose, as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded, depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments, provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary, hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process, locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume), and pore size distribution.
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公开(公告)号：US11708667B2
公开(公告)日：2023-07-25
申请号：US17095469
申请日：2020-11-11
Applicant: University of Maine System Board of Trustees
Inventor： Michael Darin Mason , David Gregg Holomakoff , Muhammad Radowan Hossen
CPC classification number: D21H11/18 , C08L1/02 , D21C9/007 , D21C9/18 , D21H17/25 , D21H17/67 , D21H21/22
Abstract: The present invention provides, inter alia, biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF), CNC, or bacterial cellulose, as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded, depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments, provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary, hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process, locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume), and pore size distribution.
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公开(公告)号：US20240342665A1
公开(公告)日：2024-10-17
申请号：US18294825
申请日：2022-08-05
Applicant: University of Maine System Board of Trustees
Inventor： Michael Darin Mason , Muhammad Radowan Hossen
CPC classification number: B01D71/10 , B01D67/003 , B01D69/02 , B01D69/14111 , B01D71/74 , B01D2311/14 , B01D2311/2688 , B01D2323/18 , B01D2323/20 , B01D2323/216 , B01D2323/21817 , B01D2323/21826 , B01D2325/40
Abstract: The present invention includes membranes comprising one or more cellulosic materials and wetting agent(s), and methods of making such membranes.
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公开(公告)号：US20210071366A1
公开(公告)日：2021-03-11
申请号：US17095469
申请日：2020-11-11
Applicant: University of Maine System Board of Trustees
Inventor： Michael Darin Mason , David Gregg Holomakoff , Muhammad Radowan Hossen
Abstract: The present invention provides, inter alia, biocompatible porous structural materials made exclusively or almost exclusively from nanocellulose fibers (CNF), CNC, or bacterial cellulose, as well as processes for making and using provided compositions. Provided compositions may possess specifically tailored mechanical strength properties and have a design-controlled porosity that is homogeneous or graded, depending on the application. Provided compositions may be manufactured by the controlled dewatering of suspensions of CNF. In some embodiments, provided compositions may include a solids concentration of about 10% to about 95% by weight. Controlled water removal and pore homo- or heterogeneity may be accomplished by controlling capillary, hydrostatic and evaporative processes in the environment of a porous mold around the CNF slurry. A freeze drying or vacuum drying step may be used to complete the drying process, locking in the porous network structure resulting in a predetermined porosity (pore volume/total volume), and pore size distribution.
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