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公开(公告)号：BRPI0408606A
公开(公告)日：2006-03-07
申请号：BRPI0408606
申请日：2004-03-19
Applicant: UNIV ALABAMA
Inventor： HOLBREY JOHN DAVID , SPEAR SCOTT K , TURNER MEGAN B , SWATLOSKI RICHARD PATRICK , ROGERS ROBIN DON
Abstract: A regenerated cellulose-encapsulated active substance and a method for encapsulating an active substance in a regenerated cellulose matrix are disclosed. The distribution of the active substance is preferably substantially homogeneous within the matrix of regenerated cellulose. The regenerated cellulose (i) has about the same molecular weight as the original cellulose from which it is prepared (ii) is substantially free of added substituent groups relative to the starting cellulose and is also substantially free of entrapped ionic liquid degradation products.
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公开(公告)号：NZ532076A
公开(公告)日：2005-09-30
申请号：NZ53207602
申请日：2002-10-03
Applicant: PG RES FOUNDATION , UNIV ALABAMA
Inventor： SWATLOSKI RICHARD PATRICK , ROGERS ROBIN DON , HOLBREY JOHN DAVID
IPC: C05G5/00 , C08B1/00 , C08J3/09 , C08B16/00 , C08J3/28 , C08L1/06 , C12N11/12 , D01F2/02 , C08L1/02
Abstract: A method for dissolving cellulose is disclosed that comprises: (a) admixing cellulose with a molten ionic liquid in the substantial absence of water or a nitrogen-containing base to form an admixture, wherein the ionic liquid is comprised of cations and anions, wherein said ionic liquid is molten at a temperature of less than about 150 °C; (b) irradiating the admixture with microwave radiation to assist in dissolution; and (c) agitating the admixture until dissolution is complete. Through this method cellulose is dissolved in an ionic liquid without derivatisation, and is regenerated in a range of structural forms without requiring the use of harmful or volatile organic solvents. Cellulose solubility and the solution properties can be controlled by the selection of the ionic liquid constituents, with small cations and halide or pseudo-halide anions favoring solution.
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