Microfibrillated cellulose and method for preparing same from primary wall plant pulp, particularly sugar beet pulp

Abstract From the Canadian patent

A microfibrillated cellulose containing at least around 80 % of primary walls and loaded with carboxylic acids, and a method for preparing same in , particular from sugar beet pulp, wherein the pulp is hydrolysed at a moderate temperature of 60-100 ~C; at least one extraction of the cellulose material is performed using a base having a concentration of less than 9 wt.%; and the cellulose residue is homogenised by mixing grinding or any high mechanical , shear processing whereafter the cell suspension is fed through a smalldiameter aperture, and the suspension is subjected to a pressure drop of at least 20 MPa and high-speed sheer action followed by a high-speed deceleration impact. …