High strength chitosan complex fiber and preparing method thereof

Abstract

The invention relates to a high strength chitosan complex fiber which has a mold resistance and is applicable to medical treatment and clothing textile fabric, and a preparing method thereof. The chitosan complex fiber obtained according to the technical scheme has a much higher overall performance than the products obtained through the prior art, has a good spinning property and good stitchability, and can be further prepared into fabrics through a knitting machine or a weaving machine as well as non-woven fabrics through a nonwoven equipment. The adopted oxidized graphene in itself has a good antibiosis effect, and compared with a graphene material, the oxidized graphene has the advantages of being easy to prepare, high in performance, low in cost, good in water dispersibility, good in adsorptive property, capable of easily conducting various kinds of functional modification and the like. Dosage adjustment and chemical modification can maintain superiority of the graphene and at the same time prevent the graphene from inducing biotoxicity so that the research and application of the graphene in the field of biomedical engineering can be broadened. The preparing method of the high strength chitosan complex fiber has the advantages of being simple in producing technology, low in preparing cost; meanwhile, the obtained high strength chitosan complex fiber has a stable performance. Therefore, the preparing method is very suitable for popularization and market expanding of the chitosan fiber and graphene industries.

Description

technical field [0001] The invention relates to the preparation of a high-strength bio-based fiber, in particular to a preparation method of a composite fiber which has antibacterial properties and can be used for medical treatment, clothing textile fabrics and industrial water treatment, and belongs to the technical field of polymer material processing and textiles. Background technique [0002] Chitosan (Chitosan), also known as soluble chitin, is a biopolymer obtained by deacetylation of chitin widely existing in nature, and its chemical name is polyβ-(1→4)-2-amino-2-deoxy -D-glucose. There are active hydroxyl groups and amino groups in chitosan macromolecules, which have strong chemical reaction capabilities and can perform various chemical modifications and modifications on chitosan. Because chitosan molecules have free amino groups, they are soluble in acidic solutions and have cationic properties, which is where their unique properties lie, thus laying the foundation...

AI Technical Summary

Problems solved by technology

The main reasons are as follows: 1) The solubility of chitosan in solvent is small, the concentration of spinning dope is limited, which is not conducive to the entanglement, crosslinking and orientation arrangement of polymer chains; 2) due to the existence of strong intermolecular Due to hydrogen bond force and high viscosity of chitosan solution, the vacuum defoaming process used in the prior art takes a long time (more than 24 hours) and the defoaming is not complete, resulting in partial degradation and fracture of the polymer, and many defects in the fiber microstructure

[0004] The prior art also proposes a method (for example: i) Xu Dezeng et al., "Glutaraldehyde Crosslinked Chitosan-PVA Preparation of Blended Fibers", Journal of Dalian University of Technology, 2013, 32 (3), 206; ii) Sai Fengdong, "Study on Improvement of Chitosan Fiber Strength by Glyoxal Crosslinking", Master Thesis of Donghua University, 2002), but the process is complex, the strength of chitosan fibers is limited, and the cross-linking agents (glutaraldehyde, glyoxal, epichlorohydrin, etc.) or other additives used are highly toxic and biologically Defects such as poor tolerance are not conducive to the application of chitosan fiber in the field of medical health or beauty