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199 条记录 (耗时 0.041 秒)

    Composite building products bound with cellulose nanofibers
    132.
    发明授权
    Composite building products bound with cellulose nanofibers 有权

    公开(公告)号：US10695947B2

    公开(公告)日：2020-06-30

    申请号：US14446712

    申请日：2014-07-30

    申请人： University of Maine System Board of Trustees

    发明人： Michael A. Bilodeau ,  Douglas W. Bousfield

    IPC分类号： B27N3/04 ,  B27N3/00

    摘要： Building materials are generated by the simple mixing of cellulose nanofiber (CNF) slurry with typical wood-derived material such as wood meal, optionally with mineral particulate materials, and dried. Particle boards are made with wood meal particulates; wallboards are made with wood particulates and mineral particulates; paints are made with pigment particulates; and cement is made with aggregate particulates. The particle board samples were tested for fracture toughness. The fracture toughness was found to be from 20% higher up to ten times higher than the typical value for similar board, depending on the formulation. For cases of 20% by weight cellulose nanofibers and 80% wood, the fracture toughness was more than double that of typical particle board. The process sequesters carbon and oxygen into the building product for its lifespan—typically decades—and avoid releasing CO2 into the atmosphere.

    Energy efficient process for preparing nanocellulose fibers
    134.
    发明授权
    Energy efficient process for preparing nanocellulose fibers 有权

    公开(公告)号：US10563352B2

    公开(公告)日：2020-02-18

    申请号：US14407751

    申请日：2013-06-13

    申请人： University of Maine System Board of Trustees

    发明人： Michael A. Bilodeau ,  Mark A. Paradis

    IPC分类号： D21C9/00 ,  D21H11/18 ,  D21H17/00 ,  D21H17/63

    摘要： A scalable, energy efficient process for preparing cellulose nanofibers is disclosed. The process employs a depolymerizing treatment with one or both of: (a) a relatively high charge of ozone under conditions that promote the formation of free radicals to chemically depolymerize the cellulose fiber cell wall and interfiber bonds; or (b) a cellulase enzyme. Depolymerization may be estimated by pulp viscosity changes. The depolymerizing treatment is followed by or concurrent with mechanical comminution of the treated fibers, the comminution being done in any of several mechanical comminuting devices, the amount of energy savings varying depending on the type of comminuting system and the treatment conditions. Comminution may be carried out to any of several endpoint measures such as fiber length, % fines or slurry viscosity.

    Method of assembling a floating wind turbine platform
    135.
    发明授权
    Method of assembling a floating wind turbine platform 有权

    公开(公告)号：US10336404B2

    公开(公告)日：2019-07-02

    申请号：US15116623

    申请日：2015-02-06

    申请人： University of Maine System Board of Trustees

    发明人： Habib J. Dagher ,  Anthony M. Viselli

    IPC分类号： B63B9/06 ,  B63B5/18 ,  F03D13/25 ,  F03D1/06 ,  F03D3/00 ,  B63B1/10 ,  F03D13/10 ,  B63B21/20 ,  B63B21/50 ,  B21D47/00 ,  B63B35/44

    摘要： A method of assembling a floating wind turbine platform includes assembling a keystone having a hollow central cavity from pre-formed concrete sections, and assembling a plurality of buoyant bottom beams from pre-formed concrete sections. Each bottom beam is attached to, and extends radially outward of the keystone to define a base assembly. Each buoyant bottom beam includes a ballast chamber therein. The keystone is post-tensioned to each bottom beam along a longitudinal axis thereof. A center column is assembled upwardly and perpendicularly on the base assembly from pre-formed sections of the center column, the outer columns are assembled on a distal end of each bottom beam from pre-formed sections of the outer columns, and the center column and the outer columns are longitudinally post-tensioned to the base assembly. A tower is assembled on the center column from pre-formed sections, and a wind turbine is assembled on the tower.

    Method of construction, assembly, and launch of a floating wind turbine platform
    136.
    发明授权
    Method of construction, assembly, and launch of a floating wind turbine platform 有权

    公开(公告)号：US10215161B2

    公开(公告)日：2019-02-26

    申请号：US15550390

    申请日：2016-02-24

    申请人： University of Maine System Board of Trustees

    发明人： Anthony M. Viselli ,  Habib J. Dagher

    IPC分类号： F03D9/00 ,  H02P9/04 ,  F03D13/25 ,  B63B1/10 ,  B63B5/20 ,  B63B21/50 ,  B63B35/44 ,  B63B35/00 ,  F03D13/40 ,  F03D13/10 ,  B63B39/03 ,  B63B1/12

    摘要： A method of constructing and assembling a floating wind turbine platform includes constructing pre-stressed concrete sections of a floating wind turbine platform base, assembling the floating wind turbine platform base sections to form the base at a first location in a floating wind turbine platform assembly area, and moving the base to a second location in the floating wind turbine platform assembly area. Pre-stressed concrete sections of floating wind turbine platform columns are constructed, and the column sections are assembled to form a center column and a plurality of outer columns on the base to define a hull at the second location in the floating wind turbine platform assembly area. The hull is then moved to a third location in the floating wind turbine platform assembly area. Secondary structures are mounted on and within the hull, and the hull is moved to a fourth location in the floating wind turbine platform assembly area. A wind turbine tower is constructed on the center column, and a wind turbine is mounted on the wind turbine tower, thus defining the floating wind turbine platform. The floating wind turbine platform is then moved to a launch platform in a fifth location and launched into a body of water.

    High efficiency production of nanofibrillated cellulose
    139.
    发明授权
    High efficiency production of nanofibrillated cellulose 有权

    公开(公告)号：US09988762B2

    公开(公告)日：2018-06-05

    申请号：US15309117

    申请日：2015-05-06

    申请人： University of Maine System Board of Trustees

    发明人： Michael A. Bilodeau ,  Mark A. Paradis

    IPC分类号： D21H11/18 ,  D21C9/00 ,  D21D1/30

    CPC分类号： D21D1/30 ,  D21C9/007 ,  D21D1/303 ,  D21D1/306 ,  D21H11/18

    摘要： A scalable, energy efficient process for preparing cellulose nanofibers employs treating the cellulosic material with a first mechanical refiner with plates having a configuration of blades separated by grooves, and subsequently treating the material with a second mechanical refiner with plates having a configuration of blades separated by grooves different than the first refiner. The plate configurations and treatment operations are selected such that the first refiner produces a first specific edge loading (SEL) that is greater than the SEL of the second refiner, by as much as 2-50 fold. An exemplary high first SEL may be in the range of 1.5 to 8 J/m. Paper products made with about 2% to about 30% cellulose nanofibers having a length from about 0.2 mm to about 0.5 mm, preferably from 0.2 mm to about 0.4 mm have improved properties.