The preparation and properties of cellulose/chitin blend filaments

Abstract

The focus of this article is the preparation and characterization of cellulose/chitin blend filaments obtained from cellulose/chitin xanthate blend solution over the experimental blend ratio, i.e., 2.89% and 6.46% (w/w) chitin content. The addition of chitin xanthate into cellulose xanthate leads to an increase of intermittence rate and the blend solution has good filtering property. Scanning electronic microscope photos shows that there exist grooves on the filaments surface, which are becoming coarse with increasing chitin content. The mechanical properties of the spun blend filaments is much higher than that of CrabyonV R fiber, which proves that the viscose method we adopt here is an efficient way to prepare cellulose/chitin blend filaments with satisfactory mechanical properties and processing property. Based on the data from X-ray, sonic velocity, equilibrium regain rate, and accessibility, it is concluded that the degree of crystallinity, modulus, degree of orientation, density, equilibrium regain rate, and accessibility of blend filaments decreases with increasing chitin content in the blend filaments in the experiment scope.

Synthesis, characterization, and drug‐release behavior of amphiphilic quaternary ammonium chitosan derivatives

“…Chitosan is a natural polyaminosaccharide, and it has a repeating structural unit of 2‐acetamido‐2‐deoxy‐β‐ d ‐glucopyranose . Because of its nontoxicity, biodegradability, and biocompatibility, a range of biological applications have been reported for chitosan, including antibacterial fibrous membranes, tissue engineering for cell cultures, sorbents, and drug delivery . However, chitosan has shown some limitations because of its poor water solubility.…”

Structure and properties of chitin/alginate blend membranes from NaOH/urea aqueous solution

“…The formation of hydrogen bonds in the blends is an important aspect of miscibility. Blending chitin with other polymers is an interesting way of preparing functional polymeric composites, such as hybrid scaffolds composed of chitin and collagen, or silk fibroin [19][20][21], blend fibers (filaments), beads, gels and membranes of cellulose and chitin [22][23][24][25][26], which indicated that good miscibility existed between chitin and some biopolymers. Alginate is a marine biopolymer, which is a binary linear hetero polysaccharide containing one, four-linked ˛-l-guluronic acid and ˇ-d-mannuronic acid.…”

Manufacture and properties of cellulose/O-hydroxyethyl chitosan blend fibers

“…Chitosan was in the form of microparticles in the above fibers and the difficulties during the manufacture are concerned with aggregation of microcrystalline chitosan particles or solid particles, blocking of filtration fabrics or spinnerets and inhomogenity distribution in the fiber structure, which all affect the fiber properties and behaviors. To make the distribution more homogeneous, chitosan, microcrystalline chitosan or chitin was xanthated by the reaction with carbon disulfide and blend with viscose dope (He, Ma, & Sun, 2009;Pang, He, & Wang, 2003;Yoshikawa et al, 1998). In this method, the spinning dope is easily homogenized.…”