METHOD OF DISSOLVING CELLULOSE
    34.
    发明申请
    METHOD OF DISSOLVING CELLULOSE 审中-公开
    溶解纤维素的方法

    公开(公告)号:US20150135991A1

    公开(公告)日:2015-05-21

    申请号:US14540696

    申请日:2014-11-13

    CPC classification number: C08L1/00 C08B1/003 C08J3/05 C08J2301/02 C08L1/02

    Abstract: A method of dissolving cellulose, comprising: firstly heating and activating the cellulose by using a heating apparatus, and then dissolving by using a solvent. The temperature of the heating and the activating is 130° C.-270° C., the time period of the heating is 0.1-100 hours, and the solvent is an aqueous solution including 6 wt %-12 wt % sodium hydroxide and 0.1 wt %-6 wt % zinc oxide. The method of dissolving comprises: heating and activating the cellulose with a degree of polymerization of DP=300-700, dispersing the cellulose into the solvent, and freezing under a temperature of −10˜-30° C. for 0.1-50 hours; then unfreezing under a condition of no more than 32° C., and standing or stirring by machine during the process of unfreezing so as to dissolve and obtain a cellulose solution with a concentration of 3 wt %-12 wt %. The obtained cellulose solution has a good solubility and stability that maintains a relatively good stability after being stood under a temperature of −8 to 32° C. for a few days. The cellulose solution can be used in the preparation of fibers, films or sponges, and is suitable for industrial production.

    Abstract translation: 一种纤维素的溶解方法,其特征在于,包括:首先使用加热装置加热活化纤维素,然后使用溶剂进行溶解。 加热温度为130℃〜270℃,加热时间为0.1〜100小时,溶剂为含有6重量%-12重量%氢氧化钠和0.1重量%的水溶液 wt%-6wt%氧化锌。 溶解方法包括:以DP = 300-700的聚合度加热和活化纤维素,将纤维素分散到溶剂中,并在-10〜-30℃的温度下冷冻0.1-50小时; 然后在不超过32℃的条件下解冻,并在解冻过程中通过机器静置或搅拌,以溶解并获得浓度为3重量%-12重量%的纤维素溶液。 得到的纤维素溶液具有良好的溶解性和稳定性,在-8〜32℃的温度下放置几天后,保持相对良好的稳定性。 纤维素溶液可用于制备纤维,薄膜或海绵,适用于工业生产。

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