The development of advanced cellulosic fibres

Woodings, Calvin

doi:10.1016/0141-8130(96)81836-8

Cited by 86 publications

(52 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,2 It has a high modulus, leading to low laundering shrinkage, and shows higher strength in both wet and dry states than viscose rayon. 3 However, it exhibits a distinct tendency to fibrillate when subjected to abrasion in the wet conditions.…”

Section: Introductionmentioning

confidence: 98%

Structural changes in Tencel by enzymatic hydrolysis

Shin

Son

Yoo

2000

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

ABSTRACT:The NaOH-, fibrillation-, and cellulase-treated Tencel fabrics were characterized by weight loss, tensile strength, scanning electron microscopy (SEM) analysis, X-ray diffraction analysis, measurements of moisture regain and dye adsorption (K/S value), degree of polymerization (DP), and copper number. Weight loss increased and tensile strength decreased with increase in cellulase concentration and treatment time. At a similar weight loss, tensile strength retentions of the NaOH-pretreated samples were better than those of the NaOH-nontreated samples because of more uniform enzymatic hydrolysis. SEM photographs showed more surface peeling and interfibrillar splitting as enzymatic hydrolysis progressed. Crystalline structure and degree of crystallinity were not much changed by cellulase treatment. As enzymatic hydrolysis progressed, moisture regain and K/S value increased slightly due to increase of specific surface area by fibrils. DP initially decreased as enzymatic hydrolysis progressed and then leveled off. Copper number increased largely at an initial stage of degradation and then decreased gradually. The NaOH-pretreated samples showed higher degree of crystallinity, DP, moisture regain, and K/S value, but lower copper number than the NaOH-nontreated ones. These results were attributed to extraction of short chain molecules in the amorphous region during NaOH pretreatment and change of amorphous region into the open-up structure.

show abstract

Section: Introductionmentioning

confidence: 98%

Structural changes in Tencel by enzymatic hydrolysis

Shin

Son

Yoo

2000

J. Appl. Polym. Sci.

View full text Add to dashboard Cite

show abstract

“…The viscose process is characterised by high consumption of water and generation of by-products, which clearly have a significant environmental impact. The lyocell process involves the physical dissolution of the cellulose in N-methylmorpholine N-oxide (NMMO) solution, extrusion of the mixture and then regeneration of the fibres by a regenerating agent such as water or alcohols (Chanzy 1982;Kim et al 1999;Chanzy et al 1990;Fink et al 2001;Woodings 1995), which removes the solvent without affecting the regenerated fibres. Unlike the viscose process, the lyocell process does not consume large quantities of water, generates no harmful by-products and allows recovery of over 99 % of the solvent for reuse.…”

Section: Introductionmentioning

confidence: 99%

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

2014

View full text Add to dashboard Cite

Dimethylol dihydroxyethylene urea (DMDHEU)-treated cotton fabrics were treated with alkali or alternatively acid followed by alkali for increasing time periods, and their effectiveness in removing the crosslinking agent was investigated by surface (X-ray photoelectron spectroscopy) analysis, bulk analysis, crease recovery angle performance and solubility in specific solvents. The cellulose yield after the chemical stripping processes was established and the effect of the acid and alkali treatments on the degree of polymerisation of the resultant cellulose determined. Surface and bulk analyses and solubility tests suggested that alkali alone could not remove the DMDHEU from the crease-resist-treated cotton fabric. However, a sequential acid/alkali treatment effectively removed the easy-care finish from the cotton fabric and produced a commercially viable yield of cellulose.

show abstract

“…25 The angle of preferred orientation with respect to the fiber axis was determined from the most intense reflection peak of equatorial diffraction (with an overlapping 110/200 plane at 2y ¼ 22. 6 ). 26,27 Curves derived from the azimuthal scans were fitted to the profiles of the mathematical model using Gauss functions, 28 as shown in eq.…”

Section: Structural Characterizationmentioning

confidence: 93%

Dry jet‐wet spinning of bagasse/N‐methylmorpholine‐N‐oxide hydrate solution and physical properties of lyocell fibres

Yamamoto

Uddin

Gotoh

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

Sugarcane bagasse, a cheap cellulosic waste material, was investigated as a raw material for producing lyocell fibers at a reduced cost. In this study, bagasse was dissolved in N-methylmorpholine-N-oxide (NMMO) 0.9 hydrate, and fibers were prepared by the dry jet-wet spinning method with coagulation in an aqueous NMMO solution. The effects of NMMO in 0 to 50% concentrations on the physical properties of fibers were investigated. The coagulating bath contained water/NMMO (10%) solution produced fiber with the highest drawability and highest physical properties. The cross-section morphology of these fibers reveals fibrillation due to the high degree of crystallinity and high molecular orientation. In the higher NMMO concentrated baths (30 to 50%), the prepared fibers were hollow inside, which could be useful to make highly absorbent materials. The lyocell fibers prepared from bagasse have a tensile strength of 510 MPa, initial modulus of 30 GPa, and dynamic modulus of approximately 41 GPa. These properties are very comparable with those of commercial lyocell fibers.

show abstract

The development of advanced cellulosic fibres

Cited by 86 publications

References 7 publications

Structural changes in Tencel by enzymatic hydrolysis

Structural changes in Tencel by enzymatic hydrolysis

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

Dry jet‐wet spinning of bagasse/N‐methylmorpholine‐N‐oxide hydrate solution and physical properties of lyocell fibres

Contact Info

Product

Resources

About