Structure and Properties of Novel Fibers Spun from Cellulose in NaOH/Thiourea Aqueous Solution

Ruan, Dong; Zhang, Lina; Zhou, Jinping; Jin, Huiming; Chen, Hui

doi:10.1002/mabi.200400120

Cited by 99 publications

(58 citation statements)

References 44 publications

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“…The diffraction peaks of pure cellulose fiber appears at 2y 12.3 , 20.3 , and 21.6 , which is in accordance with Ref. 19. The diffraction peak of cellulose at 2y 20.3 decreases with increasing chitin content, and the diffraction peak at 2y 19.8 increases with increasing chitin content, which shows that the addition of chitin destroys the crystal structure of cellulose.…”

Section: X-ray Diffraction and Degree Of Crystallinitysupporting

confidence: 87%

The preparation and properties of cellulose/chitin blend filaments

Sun

2009

J of Applied Polymer Sci

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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.

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Section: X-ray Diffraction and Degree Of Crystallinitysupporting

confidence: 87%

The preparation and properties of cellulose/chitin blend filaments

Sun

2009

J of Applied Polymer Sci

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“…Cellulose can be irreversibly converted into cellulose I β by heat treatment [17]. Cellulose II is produced via mercerization with a strong alkaline solution or precipitation from a dissolved state [18,19]. Cellulose I and II can be converted to cellulose III 1 and III 2 , respectively, by treatment with dry liquid ammonia [2].…”

Section: Introductionmentioning

confidence: 99%

Correlations of Apparent Cellulose Crystallinity Determined by XRD, NMR, IR, Raman, and SFG Methods

Lee

Dazen

Kafle

et al. 2015

Advances in Polymer Science

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Although the cellulose crystallinity index (CI) is used widely, its limitations have not been adequately described. In this study, the CI values of a set of reference samples were determined from X-ray diffraction (XRD), nuclear magnetic resonance (NMR), and infrared (IR), Raman, and vibrational sum frequency generation (SFG) spectroscopies. The intensities of certain crystalline peaks in IR, Raman, and SFG spectra positively correlated with the amount of crystalline cellulose in the sample, but the correlation with XRD was nonlinear as a result of fundamental differences in detection sensitivity to crystalline cellulose and improper baseline corrections for amorphous contributions. It is demonstrated that the intensity and shape of the XRD signal is affected by both the amount of crystalline cellulose and crystal size, which makes XRD analysis complicated. It is clear that the methods investigated show the same qualitative trends for samples, but the absolute CI values differ depending on the determination method. This clearly indicates that the CI, as estimated by different methods, is not an absolute value and that for a given set of samples the CI values can be compared only as a qualitative measure.

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“…Fibers produced from this solvent reached similar values for the mechanical properties as commercial fibers. However, the fibers were only rolled up on one roller, and so the effect of draw ratio could not be investigated [77]. The addition of ZnO into the NaOH solution has also been demonstrated to result in improved mechanical properties of regenerated fibers.…”

Section: Aqueous Alkalimentioning

confidence: 99%

Cellulose modification and shaping – a review

Jedvert

Heinze

2017

Journal of Polymer Engineering

141

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Abstract This review aims to present cellulose as a versatile resource for the production of a variety of materials, other than pulp and paper. These products include fibers, nonwovens, films, composites, and novel derivatized materials. This article will briefly introduce the structure of cellulose and some common cellulose derivatives, as well as the formation of cellulosic materials in the micro- and nanoscale range. The challenge with dissolution of cellulose will be discussed and both derivatizing and nonderivatizing solvents for cellulose will be described. The focus of the article is the critical discussion of different shaping processes to obtain a variety of cellulose products, from commercially available viscose fibers to advanced and functionalized materials still at the research level.

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Structure and Properties of Novel Fibers Spun from Cellulose in NaOH/Thiourea Aqueous Solution

Cited by 99 publications

References 44 publications

The preparation and properties of cellulose/chitin blend filaments

The preparation and properties of cellulose/chitin blend filaments

Correlations of Apparent Cellulose Crystallinity Determined by XRD, NMR, IR, Raman, and SFG Methods

Cellulose modification and shaping – a review

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