Effect of sodium hydroxide pre-treatment on the optical and structural properties of lyocell

被引：50

作者：

Goswami, Parikshit ^{[1
]}

Blackburn, Richard S. ^{[1
]}

El-Dessouky, Hassan M. ^{[2
,3
]}

Taylor, Jim ^{[4
]}

White, Patrick ^{[4
]}

机构：

[1] Univ Leeds, Green Chem Grp, Ctr Tech Text, Leeds LS2 9JT, W Yorkshire, England

[2] Univ Leeds, Fibres Res Grp, Ctr Tech Text, Leeds LS2 9JT, W Yorkshire, England

[3] Mansoura Univ, Fac Sci, Dept Phys, Mansoura, Egypt

[4] Lenzing Fibers, Lenzing, Austria

来源：

EUROPEAN POLYMER JOURNAL | 2009年 / 45卷 / 02期

关键词：

Swelling; Optics; Polysaccharides; Density; TEM; Fibres; VISCOSE-TYPE FIBERS; X-RAY-DIFFRACTION; CELLULOSIC FIBERS; FIBRILLATION TENDENCY; ALKALI TREATMENT; PART; MERCERIZATION; BEHAVIOR;

D O I：

10.1016/j.eurpolymj.2008.10.030

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Lyocell is a type of regenerated cellulose. Fibres spun from cellulose solution in N-methyl-morpholine-N-oxide hydrate consist of crystalline cellulose II and amorphous cellulose. Lyocell fabrics were treated with aqueous sodium hydroxide solution (NaOH) to study the influence of alkali on optical and structural properties. It was observed that sodium hydroxide treatment Causes the density, orientation and crystallinity of lyocell fibre to decrease with increasing sodium hydroxide concentration, a corresponding decrease in tensile strength is also observed. The greatest change in fibre properties occurs between 3.0 and 5.0 mol dm(-3) NaOH. This is attributed to the onset of formation of Na-cellulose 11 at 3.0 mol dm(-3) NaOH; a fully formed Na-cellulose II structure is expected above 6.8 mol dm(-3) NaOH. Formation of Na-cellulose II causes plasticization of the lyocell fibres as both inter- and intra-molecular hydrogen bonds are broken by these higher sodium hydroxide concentrations. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：455 / 465

页数：11

共 43 条

[21] Prediction of the change in density in systematic series of fibre-forming polymers [J].

Kynin, AT ;

Grebennikov, SF ;

Perepelkin, KE ;

Andreeva, LP .

FIBRE CHEMISTRY, 1996, 28 (02) :73-75

[22] A revised structure and hydrogen-bonding system in cellulose II from a neutron fiber diffraction analysis [J].

Langan, P ;

Nishiyama, Y ;

Chanzy, H .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (43) :9940-9946

[23]

LENNOXKERR P, 1994, TECH TEXT INT, V3, P18

[24] PROPERTIES AND STRUCTURE OF SOLVENT-SPUN AND VISCOSE-TYPE FIBERS IN THE SWOLLEN STATE [J].

LENZ, J ;

SCHURZ, J ;

WRENTSCHUR, E .

COLLOID AND POLYMER SCIENCE, 1993, 271 (05) :460-468

[25] AN EXPERIMENTAL APPROACH TO SPINNING NEW CELLULOSE FIBERS WITH N-METHYLMORPHOLINE-OXIDE AS A SOLVENT [J].

LOUBINOUX, D ;

CHAUNIS, S .

TEXTILE RESEARCH JOURNAL, 1987, 57 (02) :61-65

[26]

Mortimer SA, 1996, CELL CHEM TECHNOL, V30, P117

[27]

Nemec H., 1994, LENZINGER BERICHTE, V9, P69

[28]

Öztürk HB, 2007, FIBRES TEXT EAST EUR, V15, P114

[29] Splitting tendency of cellulosic fibers -: Part 1.: The effect of shear force on mechanical stability of swollen lyocell fibers [J].

Oeztuerk, Hale Bahar ;

Okubayashi, Satoko ;

Bechtold, Thomas .

CELLULOSE, 2006, 13 (04) :393-402

[30] Crystalline structure analysis of cellulose treated with sodium hydroxide and carbon dioxide by means of X-ray diffraction and FTIR spectroscopy [J].

Oh, SY ;

Yoo, DI ;

Shin, Y ;

Kim, HC ;

Kim, HY ;

Chung, YS ;

Park, WH ;

Youk, JH .

CARBOHYDRATE RESEARCH, 2005, 340 (15) :2376-2391

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