分馏和纤维素酶处理提高牛皮纸浆溶解性能。
Fractionation and cellulase treatment for enhancing the properties of kraft-based dissolving pulp.
机构信息
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
出版信息
Bioresour Technol. 2017 Jan;224:439-444. doi: 10.1016/j.biortech.2016.10.077. Epub 2016 Oct 27.
The aim of this study was to investigate a combined process involving pulp fractionation and cellulase treatment of each fraction for improving the molecular weight distribution (MWD) and reactivity of a kraft-based dissolving pulp. Three pulp fractions, namely long-fiber, mid-fiber and short-fiber fractions (LF, MF and SF, respectively), were used as the substrates. The results showed that the SF had the highest accessibility, lowest viscosity, and highest cellulase adsorption capacity, while the opposite was true for the LF. At a given viscosity, the combined process led to a lower polydispersity index (3.71 vs 4.98) and a higher Fock reactivity (85.6% vs 76.3%), in comparison to the conventional single-stage cellulase treatment.
本研究旨在探索一种联合工艺，即对各部分进行纤维分级和纤维素酶处理，以改善硫酸盐浆的分子量分布（MWD）和反应性。该工艺使用了三种浆粕纤维分级，即长纤维、中纤维和短纤维分级（LF、MF 和 SF）作为底物。结果表明，SF 具有最高的可及性、最低的粘度和最高的纤维素酶吸附能力，而 LF 则相反。在给定的粘度下，与传统的单阶段纤维素酶处理相比，联合工艺导致更低的多分散指数（3.71 对 4.98）和更高的 Fock 反应性（85.6% 对 76.3%）。
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