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公开(公告)号:US10450435B2
公开(公告)日:2019-10-22
申请号:US15526422
申请日:2015-11-17
发明人: Álvaro Tejado Etayo , Alejandro Salvador Polo , Jokin Hidalgo Betanzos , Maider Azpeitia Lakuntza , Ingemar Svensson
摘要: A process for preparing a cellulosic sponge includes the steps of treating an aqueous suspension of cellulose fibers with periodate; adjusting the pH of the resulting dialdehyde cellulose fibers suspension to a value between 2.5 to 5.5; freezing the suspension obtained and thawing the three dimensional structure to render the cellulosic sponge. The process may further include a step of drying to render a cellulosic foam. Both the new sponge and the new foam may also be further chemically modified obtaining a broad variety of derivatives with tailored properties which are useful in many different applications.