不同纤维素浆粕溶液的流变特性与溶喷成形对比研究OA

As a renewable and biodegradable natural polymer,cellulose has received extensive attention in the field of eco-friendly nonwovens in recent years.Owing to its advantages of continuous process,fine fibers and uniform web formation,the solution-spraying spinning technology has become an emerging method for preparing cellulose-based functional materials.The properties of pulp raw materials directly affect the dissolution behavior,spinnability and final structural performance of cellulose.In this paper,three different sources of cellulose pulps were selected to systematically investigate the effects of their physical and chemical properties such as degree of polymerization,crystallinity,α-cellulose content,density and ash content on solubility,rheological properties,fiber morphology and adhesion performance.The results showed that a lower degree of polymerization and lower density were beneficial to the dissolution of cellulose pulps in the N-methylmorpholine-N-oxide(NMMO)/water system;the spinning solution of pulp No.1 had appropriate steady-state and dynamic rheological properties with good spinnability,and the obtained web was evenly distributed.The No.1 sample prepared had a higher specific surface area and a more optimized web structure with an average pore size of 12.2 μm and an adhesion strength of 1.64 N/50 mm,which was the highest value.And its adhesion performance was superior to that of commercially available pure cotton mask base fabric.The study provides a theoretical basis and practical reference for the ap-plication of cellulose solution-spraying nonwovens in personal care products such as masks.