Laboratory of Sustainable Nanomaterials, Department of Wood Engineering and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, 49189-43464, Iran.
Department of Pulp and Paper Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, 49189-43464, Iran.
Carbohydr Polym. 2021 Mar 15;256:117425. doi: 10.1016/j.carbpol.2020.117425. Epub 2020 Nov 23.
This study introduces a new combined method of wood impregnation and chemical pulping processes leading to the production of superparamagnetic cellulose fibers with a magnetic nanoparticle-free outer surface. First, magnetic wood chips (MWCs) were prepared by in situ synthesizing of magnetite (FeO) nanoparticles during the wood impregnation process. The MWCs were then converted into magnetic fibers by kraft pulping. The results showed that the resulting magnetic fibers had an outer surface comparable to that of non-magnetic fibers while showing superparamagnetic behavior. The XRD results confirmed that the in situ synthesized magnetic nanoparticles were magnetite. Papers made from the new type of magnetic cellulose fibers had much more desirable tensile properties, appearance, and printability than papers made from conventional magnetic cellulose fibers, comparable to those made from non-magnetic fibers.
本研究介绍了一种新的木材浸渍和化学制浆相结合的方法，可生产具有无磁性纳米颗粒外表面的超顺磁纤维素纤维。首先，通过在木材浸渍过程中原位合成磁铁矿（FeO）纳米颗粒制备磁性木片（MWC）。然后，MWC 通过硫酸盐法制浆转化为磁性纤维。结果表明，所得磁性纤维的外表面与非磁性纤维相当，但表现出超顺磁行为。XRD 结果证实，原位合成的磁性纳米颗粒为磁铁矿。与传统磁性纤维素纤维制成的纸张相比，由新型磁性纤维素纤维制成的纸张在拉伸性能、外观和印刷适性方面要好得多，与非磁性纤维制成的纸张相当。
