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    • 7. 发明授权
    • Polymeric film or coating comprising hemicellulose
    • 聚合物膜或包含半纤维素的涂层
    • US08557033B2
    • 2013-10-15
    • US12527070
    • 2008-02-19
    • Maria GröndahlLisa BindgardPaul GatenholmThomas Hjertberg
    • Maria GröndahlLisa BindgardPaul GatenholmThomas Hjertberg
    • C08L1/00C08L3/00C08L5/00C09D101/00C09D103/00C09D105/00C09J101/00C09J103/00C09J105/00C08K3/34C08K9/04D21H19/58C09C1/42
    • C08L5/14B05D3/0254C08J5/18C08J2305/14C08K3/346C08K3/36C08K5/053C08L1/02C08L29/04C08L2201/06C09D101/02C09D105/14D21H21/16Y10T428/251Y10T428/277C08L2666/26C08L2666/04
    • A film forming composition and a polymeric film or coating comprising hemicellulose and at least one component selected from the group consisting of plasticizers, cellulose, and an oligomer or polymer, is disclosed, said polymeric film or coating further comprising at least one additive/reactant increasing the liquid/moisture resistance and mixed with and/or reacting with the hemicellulose and said at least one component before or in conjunction with the forming of the film or coating. The use of said film or coating is also disclosed. Further, a method for the manufacture of said polymeric film or coating is disclosed, as well as a method for improving the liquid/moisture resistance of hemicellulose. Said at least one additive/reactant increasing the liquid/moisture resistance is either a cross-linking agent or a hydrophobizing agent. In another preferred embodiment the additive is a 2:1 layered phyllosilicate. The additive forms a nanocomposite with the hemicellulose as a matrix. The hemicellulose/phyllosilicate nanocomposite reinforced material provides excellent liquid/moisture resistance. Heat treatment of all of the films increases their liquid/moisture resistance and reduces their oxygen permeability.
    • 公开了一种成膜组合物和包含半纤维素和至少一种选自增塑剂,纤维素和低聚物或聚合物的组分的聚合物膜或涂层,所述聚合物膜或涂层还包含至少一种添加剂/反应物增加 液体/耐湿性,并与半纤维素和所述至少一种组分在形成薄膜或涂层之前或结合之后混合和/或与半纤维素和所述至少一种组分反应。 还公开了所述膜或涂层的使用。 此外,公开了制造所述聚合物膜或涂层的方法,以及用于改善半纤维素的液体/耐湿性的方法。 所述至少一种增加液体/耐湿性的添加剂/反应物是交联剂或疏水剂。 在另一个优选的实施方案中,添加剂是2:1层状页硅酸盐。 添加剂形成与半纤维素作为基质的纳米复合材料。 半纤维素/页硅酸盐纳米复合材料增强材料提供优异的液体/防潮性。 所有这些膜的热处理增加了它们的液体/耐湿性并降低了它们的透氧性。
    • 9. 发明申请
    • MODIFICATION OF XYLAN
    • XYLAN的修改
    • US20130233501A1
    • 2013-09-12
    • US13703223
    • 2011-06-07
    • Willem Heber Van ZylAnnie Fabian Abel ChimphangoJohann Ferdinand Gorgens
    • Willem Heber Van ZylAnnie Fabian Abel ChimphangoJohann Ferdinand Gorgens
    • D21H17/24
    • D21H17/24C09D105/14C12P19/04C12P2203/00C12Y302/01055C12Y302/01139D21C9/005D21H11/20
    • The invention provides a method of modifying soluble xylan which contains glucuronic acid and/or arabinose side chains so that it can be adsorbed onto other substrates. The method includes the steps of enzymatically modifying the xylan by selectively removing glucuronic acid and/or arabinose side chains from the xylan with α-D-glucuronidase and/or α-L-arabinofuranosidase, and allowing the modified xylan to adsorb onto the substrate. The substrate may be a cellulosic substrate like pulp or paper or a non-cellulosic substrate. The enzymes are able to remove a sufficient number of the xylan side chains so as to decrease water solubility of the xylan, induce xylan precipitation and allow adsorption of the xylan onto other substrates. A pulping process which incorporates modification of xylan and adsorption onto cellulosic material is also provided, as are products which contain the modified xylan.
    • 本发明提供了一种修饰含有葡糖醛酸和/或阿拉伯糖侧链的可溶性木聚糖的方法,使其可以吸附到其它底物上。 该方法包括以下步骤:通过用α-D-葡糖醛酸糖苷酶和/或α-L-阿拉伯呋喃糖苷酶选择性地除去来自木聚糖的葡糖醛酸和/或阿拉伯糖侧链,并且使改性的木聚糖吸附在基材上,酶促改性木聚糖。 基材可以是纤维素基质如纸浆或纸或非纤维素基质。 酶能够除去足够数量的木聚糖侧链,以降低木聚糖的水溶性,诱导木聚糖沉淀并允许木聚糖吸附到其它底物上。 还提供了将木聚糖修饰和吸附到纤维素材料上的制浆方法,以及含有改性木聚糖的产品。