交联牛皮纸浆组合物和方法

文档序号:825386 发布日期:2021-03-30 浏览:22次 >En<

阅读说明:本技术 交联牛皮纸浆组合物和方法 (Crosslinked kraft pulp compositions and methods ) 是由 M·罗 于 2017-02-24 设计创作,主要内容包括:根据某些实施方案的纸浆包含交联纤维素纤维并且具有高的亮度、反应性和特性粘度,且因此可非常适合用作低色度、高粘度纤维素衍生物的制备中的前体。根据本技术的方法包括由纤维素原料形成纸浆,漂白纸浆,在纸浆具有高稠度时交联纸浆中的纤维素纤维,并干燥纸浆。交联纤维素纤维可以包括将纤维暴露于具有两个或更多个缩水甘油基并且每环氧化物的分子量在140至175的范围内的缩水甘油醚交联剂。根据本技术的另一种方法包括提供纸浆的水性悬浮液,其包含之前漂白和干燥的化学木浆纤维,用这种缩水甘油醚交联剂交联纤维,并干燥纸浆。(Pulp according to certain embodiments comprises crosslinked cellulosic fibers and has high brightness, reactivity, and intrinsic viscosity, and thus may be well suited for use as precursors in the preparation of low-color, high-viscosity cellulose derivatives. The method according to the present technique comprises forming a pulp from a cellulosic raw material, bleaching the pulp, cross-linking cellulosic fibers in the pulp while the pulp has a high consistency, and drying the pulp. Crosslinking the cellulosic fibers can include exposing the fibers to a glycidyl ether crosslinking agent having two or more glycidyl groups and a molecular weight per epoxide in the range of 140 to 175. Another method in accordance with the present technique includes providing an aqueous suspension of pulp comprising previously bleached and dried chemical wood pulp fibers, crosslinking the fibers with such a glycidyl ether crosslinking agent, and drying the pulp.)

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