Process for the manufacture of cellulose-based fibres and the fibres thus obtained

摘要

A method for the spinning of a fiber comprising cellulose nano-fibrils aligned along the main axis of the fiber from a lyotropic suspension of cellulose nano-fibrils, the nano-fibril alignment being achieved through extension of the extrude fiber from a die, spinneret or needle, wherein the fiber is dried under extension and the aligned nano-fibrils aggregate to form a continuous structure and wherein the suspension of nano-fibrils, which has a concentration of solids of at least 7% wt, is homogenized using at least a mechanical, distributive mixing process prior to its extrusion. The fibrils used in this method can be extracted from a cellulose-rich material such as wood. The invention also related to a cellulose-based fiber obtained according to this method and to a cellulose fiber which contains at least 90% wt of crystallized cellulose.

主权项

1. A method for the spinning of a continuous fibre comprising of cellulose nano-fibrils having a length in a range of 70 to 1000 nm, and being aligned along a main axis of the fibre from a lyotropic suspension of cellulose nano-fibrils, said nano-fibril alignment being achieved through extension of an extruded fibre from a die, spinneret or needle,
wherein said fibre is dried under extension and the aligned nano-fibrils are aggregated to form a continuous fibre, wherein the suspension of nano-fibrils, which has a concentration of solids of at least 7% wt, is homogenised using at least one mechanical distributive and dispersive mixing process prior to its extrusion, and wherein said lyotropic suspension contains cellulose nano-fibrils which are subjected to surface charging to obtain an average zeta potential ranging from −60 mV to −20 mV.