公开(公告)号：WO2014070092A1

公开(公告)日：2014-05-08

申请号：PCT/SE2013/051276

申请日：2013-10-31

Applicant: SWETREE TECHNOLOGIES AB

Inventor： CARLMARK MALKOCH, Anna ,  MALMSTRÖM JONSSON, Eva ,  BOUJEMAOUI, Assya

IPC: C08L1/10 ,  C08B3/00 ,  C08B15/02 ,  C08L1/04 ,  C08B3/14 ,  C08B15/08 ,  D21H11/20

CPC classification number: C08B3/00 ,  C08B1/02 ,  C08B3/14 ,  C08B15/02 ,  C08B15/08 ,  C08L1/04 ,  C08L1/10 ,  D21C9/005 ,  D21H11/20

Abstract: The present invention relates to a cellulose nanocrystal functionalized with a group R, a method for preparation of cellulose nanocrystals that are functionalized with one or more groups R and use of functionalized cellulose nanocrystals in composites and for grafting. The aim of the invention is to offer more rapid and simplified methods to generate functional CNC with high degree of reactive groups on the surface. Furthermore, there is a need for functional CNCs with groups on the surface that can be used in composite materials and where the reactive group can work as coupling agents, initiators for polymer grafting or as crosslinkers. This is achieved by a method for preparation of cellulose nanocrystals that are functionalized with one or more groups R, wherein the method comprises the steps of: a) providing cellulose; b) treating the cellulose with an acidic water solution; c) removing the acidic water solution; d) adding a solution comprising an organic acid; e) reacting the mixture obtained in step d).

Abstract translation: 本发明涉及用R族官能化的纤维素纳米晶体，一种用一种或多种R官能化的纤维素纳米晶体的制备方法以及在复合材料和接枝中使用官能化的纤维素纳米晶体。 本发明的目的是提供更快速和简化的方法来产生表面上具有高度反应性基团的功能性CNC。 此外，需要具有表面上的基团的功能性CNCs，其可以用于复合材料中，并且其中反应性基团可以作为偶联剂，聚合物接枝的引发剂或交联剂。 这通过用一种或多种基团R官能化的纤维素纳米晶体的制备方法来实现，其中所述方法包括以下步骤：a）提供纤维素; b）用酸性水溶液处理纤维素; c）除去酸性水溶液; d）加入包含有机酸的溶液; e）使步骤d）中获得的混合物反应。