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公开(公告)号：US10563352B2
公开(公告)日：2020-02-18
申请号：US14407751
申请日：2013-06-13
Applicant: University of Maine System Board of Trustees
Inventor： Michael A. Bilodeau , Mark A. Paradis
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US09988762B2
公开(公告)日：2018-06-05
申请号：US15309117
申请日：2015-05-06
Applicant: University of Maine System Board of Trustees
Inventor： Michael A. Bilodeau , Mark A. Paradis
Abstract: 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.
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公开(公告)号：US11634863B2
公开(公告)日：2023-04-25
申请号：US16754556
申请日：2018-10-11
Applicant: University of Maine System Board of Trustees
Inventor： Michael A. Bilodeau , Mark A. Paradis
Abstract: An improved market pulp and process for making the same by adding a composite material are described. The composite material includes cellulose nanocrystals, cellulose nanofibers, or another high aspect ratio, high surface area cellulose material (or a starch, or both) and a crosslinking compound that crosslinks a portion of the surface hydroxyl groups to form a 3-D matrix. Adding the composite material to market pulp has been shown to improve the strength of twice-dried paper products, made from such an enhanced market pulp. By crosslinking a portion of the surface hydroxyl groups in the market pulp to form a 3-D matrix, a first drying step may be accomplished without loss of benefits afforded when the market pulp is later re-pulped to make a paper product.
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公开(公告)号：US20200347549A1
公开(公告)日：2020-11-05
申请号：US16754556
申请日：2018-10-11
Applicant: University of Maine System Board of Trustees
Inventor： Michael A. Bilodeau , Mark A. Paradis
Abstract: An improved market pulp and process for making the same by adding a composite material are described. The composite material includes cellulose nanocrystals, cellulose nanofibers, or another high aspect ratio, high surface area cellulose material (or a starch, or both) and a crosslinking compound that crosslinks a portion of the surface hydroxyl groups to form a 3-D matrix. Adding the composite material to market pulp has been shown to improve the strength of twice-dried paper products, made from such an enhanced market pulp. By crosslinking a portion of the surface hydroxyl groups in the market pulp to form a 3-D matrix, a first drying step may be accomplished without loss of benefits afforded when the market pulp is later re-pulped to make a paper product.
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公开(公告)号：US20150167243A1
公开(公告)日：2015-06-18
申请号：US14407751
申请日：2013-06-13
Applicant: University of Maine System Board of Trustees
Inventor： Michael A. Bilodeau , Mark A. Paradis
Abstract: 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.
Abstract translation: 公开了一种用于制备纤维素纳米纤维的可伸缩的节能方法。 该方法采用以下一种或两种的解聚处理：（a）在促进形成自由基以化学解聚纤维素纤维细胞壁和纤维间键的条件下相对较高的臭氧量; 或（b）纤维素酶。 解聚可以通过纸浆粘度变化来估计。 解聚处理之后是或同时进行处理的纤维的机械粉碎，粉碎在几种机械粉碎装置中的任何一种中进行，能量节省量根据粉碎系统的类型和处理条件而变化。 可以进行任何终点测量，例如纤维长度，细粉％或浆液粘度。
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公开(公告)号：US20170073893A1
公开(公告)日：2017-03-16
申请号：US15309117
申请日：2015-05-06
Applicant: University of Maine System Board of Trustees
Inventor： Michael A. Bilodeau , Mark A. Paradis
Abstract: A scalable, energy efficient process for preparing cellulose nanofibers is disclosed. The process 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 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.
Abstract translation: 公开了一种用于制备纤维素纳米纤维的可伸缩的节能方法。 该方法采用用第一机械磨浆机处理纤维素材料，其中板材具有由槽分隔的叶片构型，随后用具有不同于第一精磨机的槽分隔的叶片构型的第二机械磨浆机处理该材料。 板配置和处理操作被选择为使得第一精磨机产生大于第二精磨机的SEL的第一SEL高达2-50倍。 示例性的高第一SEL可以在1.5至8J / m的范围内。 用大约2％至大约30％的长度为约0.2mm至约0.5mm，优选为0.2mm至约0.4mm的纤维素纳米纤维制成的纸制品具有改进的性能。
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