公开(公告)号：US20150158955A1

公开(公告)日：2015-06-11

申请号：US14413449

申请日：2013-07-12

Applicant: SAPPI NETHERLANDS SERVICES B.V.

Inventor： Ian Graveson ,  Robert English

IPC: C08B15/02 ,  D21H21/22 ,  D21H17/64 ,  D21H17/07 ,  D21H17/66

CPC classification number: C08B15/02 ,  D21C9/004 ,  D21C9/005 ,  D21C9/007 ,  D21H11/18 ,  D21H17/07 ,  D21H17/64 ,  D21H17/66 ,  D21H21/22

Abstract: A low energy method for the preparation of nanocellulose using selected organic or inorganic swelling agents. The use of these swelling agents allows opening up the intercrystalline structure and partially the intracrystalline structure of cellulosic materials thereby achieving a reduction 5 in the energy required to subsequently process the resultant swollen cellulose material into nanocellulose.

Abstract translation: 使用选择的有机或无机溶胀剂制备纳米纤维的低能量方法。 使用这些溶胀剂允许打开晶间结构，部分地打开纤维素材料的晶体内结构，从而实现将所得溶胀的纤维素材料加工成纳米纤维所需的能量的减少5。

公开(公告)号：US09371401B2

公开(公告)日：2016-06-21

申请号：US14413449

申请日：2013-07-12

Applicant: SAPPI NETHERLANDS SERVICES B.V.

Inventor： Ian Graveson ,  Robert English

IPC: D21H17/07 ,  C08B15/02 ,  D21C9/00 ,  D21H11/18 ,  D21H17/64 ,  D21H17/66 ,  D21H21/22

CPC classification number: C08B15/02 ,  D21C9/004 ,  D21C9/005 ,  D21C9/007 ,  D21H11/18 ,  D21H17/07 ,  D21H17/64 ,  D21H17/66 ,  D21H21/22

Abstract: A low energy method for the preparation of nanocellulose using selected organic or inorganic swelling agents. The use of these swelling agents allows opening up the intercrystalline structure and partially the intracrystalline structure of cellulosic materials thereby achieving a reduction 5 in the energy required to subsequently process the resultant swollen cellulose material into nanocellulose.

Abstract translation: 使用选择的有机或无机溶胀剂制备纳米纤维的低能量方法。 使用这些溶胀剂允许打开晶间结构，部分地打开纤维素材料的晶体内结构，从而实现将所得溶胀的纤维素材料加工成纳米纤维所需的能量的减少5。

公开(公告)号：US10669384B2

公开(公告)日：2020-06-02

申请号：US15762901

申请日：2016-09-26

Applicant: SAPPI Netherlands Services B.V.

Inventor： Reyes Menendez Gonzalez ,  Daniela Oana Trambitas ,  Seda Cantekin ,  Ian Graveson ,  Math Jennekens ,  Saschi Momin

IPC: C08J3/12 ,  B01D1/18 ,  D21C9/00 ,  F26B3/12 ,  D21H11/18 ,  B01D11/02 ,  C08J3/03 ,  C08J3/09 ,  B82Y40/00

Abstract: The present invention provides for a process for producing dry, water-dispersible, non-surface modified nanocellulose particles or a powderous composition r comprising said particles comprising the steps of: i. providing a first suspension of non-surface modified cellulose particles in an first aqueous liquid, which aqueous liquid is non-solubilizing for the non-surface modified nanocellulose particles, ii. exchanging substantially all of the first aqueous liquid of the first suspension for a second solvent, which is miscible with the first aqueous liquid and non-solubilizing for the non-surface modified nanocellulose particles, to form a second suspension of non-surface modified nanocellulose particles in said second solvent, iii. contacting a flow of the second suspension of non-surface modified nanocellulose particles with a flow of a fluid in a supercritical or critical state, which fluid in a supercritical or critical state is miscible with the second solvent and non-solvating for the non-surface modified nanocellulose particles under conditions suitable for the transfer of substantially all of the second solvent into the supercritical fluid, iv. removing the second solvent and the fluid in a supercritical or critical state, preferably by controlling pressure and/or temperature, to form the dry, water-dispersible nanocellulose particles, v. collecting the dry, water-dispersible, non-surface modified nanocellulose particles and/or forming the powderous composition comprising said particles.