Univ. Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France.
Univ. Grenoble Alpes, CNRS, Grenoble INP, LGP2, F-38000 Grenoble, France.
Carbohydr Polym. 2022 Nov 15;296:119946. doi: 10.1016/j.carbpol.2022.119946. Epub 2022 Aug 3.
Microfibrillated cellulose (MFC) is an emerging cellulosic material that has shown enormous potential in various industrial sectors such as food packaging, cosmetics, pharmaceuticals, filler for cement and paper, and others. Yet, there is still the need to improve its processing in order to reach its full potential. Despite research efforts for the production of MFC, the production volumes remain low because the costs of these products are hardly competitive with synthetic polymers. The present study investigates the conversion of bleached Kraft pulp into MFC using three different oxidative treatments: (1) oxidation with sodium periodate followed by oxidation with hydrogen peroxide to enrich the pulp with carboxyl groups; (2) activation of hydrogen peroxide with copper to produce hydroxyl radicals; and (3) use of hydrogen peroxide alone in alkaline medium. Treatments (1) and (2) allowed producing interesting MFC with reduced energy consumption.
微原纤纤维素（MFC）是一种新兴的纤维素材料，在食品包装、化妆品、制药、水泥和纸张等各种工业领域显示出了巨大的潜力。然而，仍然需要改进其加工工艺，以充分发挥其潜力。尽管已经开展了 MFC 生产的研究工作，但由于这些产品的成本几乎无法与合成聚合物竞争，因此其生产规模仍然较小。本研究使用三种不同的氧化处理方法将漂白硫酸盐浆转化为 MFC：（1）用过氧化氢对高碘酸钠进行氧化处理，然后对浆粕进行氧化处理，以增加羧基含量；（2）用铜激活过氧化氢以产生羟基自由基；（3）在碱性介质中单独使用过氧化氢。处理方法（1）和（2）可以在降低能耗的情况下生产出有趣的 MFC。
