Investigation of the possibility of obtaining powdered cellulose using a non-knife method of grinding fibrous semi-finished products

Abstract

The pulp and paper industry occupies one of the leading places among various sectors of the national economy in terms of versatility and prevalence throughout the world, as well as the need for its products for the economy of any country. In addition, with the advent of printing systems that operate at an increasingly faster speed and perform complex tasks, the requirements for the properties and quality of paper have increased. At present, powdered cellulose is a promising direction in the development of the pulp and paper industry. The article discusses the possibility of obtaining powdered cellulose with preliminary grinding on a knifeless grinding plant of the “jet-barrier” type. The morphological properties of the fiber and the degree of polymerization of powdered cellulose are given depending on the degree of grinding.

Obtaining microcrystalline cellulose based on biodamaged wood as a way to improve the sanitary and forest pathological state of forests

“…Moreover, the increase in the outer surface of the fibers is most affected by the speed of the jet outflow from the nozzle onto the barrier. The authors of [7,8] found that it affects the force of impact of the jet against the barrier and the magnitude of shear stresses that arise when the jet spreads over the IOP Publishing doi:10.1088/1755-1315/1231/1/012031 4 barrier, as well as the wave nature of the jet motion, which in turn determines the effect of ultrasonic cavitation at the point of contact of the jet with a barrier.…”

Bio-damaged wood processing in microcrystalline cellulose production

“…The hydro-mechanical method of processing the obtained pulp included the refining and bleaching of a fibrous suspension with a concentration of 2% on an experimental non-cutter refining jet-barrier-type machine (Lahno et al 1990) (Figs. 2 and 3) from 15 °SR to 75 °SR with parameters selected on the basis of studies previously conducted at the Department (Kaplyov et al 2021;Yurtayeva et al 2021;Alashkevich et al 2023): operating pressure 13 MPa, distance from the nozzle to the barrier 0.2 m, and nozzle taper angle 45°.…”