Effect of alkali and silane surface treatments on regenerated cellulose fibre type (Lyocell) intended for composites

被引:52
作者
Ramamoorthy, Sunil Kumar [1 ]
Skrifvars, Mikael [1 ]
Rissanen, Marja [2 ]
机构
[1] Univ Boras, Swedish Ctr Resource Recovery, S-50190 Boras, Sweden
[2] Tampere Univ Technol, Dept Mat Sci, FIN-33101 Tampere, Finland
关键词
Surface modification; Fibre; Alkali; Silane; Lyocell; Cellulose; MECHANICAL-PROPERTIES; NATURAL FIBER; CHEMICAL-MODIFICATION; REINFORCED COMPOSITES; THERMAL-PROPERTIES; WATER-ABSORPTION; JUTE; HEMP; BEHAVIOR; SISAL;
D O I
10.1007/s10570-014-0526-6
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
Cellulose fibres have significant importance and potential for polymer reinforcement. It is essential to modify the surface of the fibre to obtain good fibre-matrix interface. Surface treatments can increase surface roughness of the fibre, change its chemical composition and introduce new moieties that can effectively interlock with the matrix, resulting in good mechanical properties in the composites. This is mainly due to improved fibre-matrix adhesion. The treatments may also reduce the water absorption rate by converting part of the hydroxyl groups on the fibre surface into other functional groups. Chemical modification of the surface of a regenerated cellulose fibre of the Lyocell type was carried out by alkali and silane treatments, which significantly changed the properties of the Lyocell fibres. Three parameters were considered when the fibre surface treatment was done: concentration (2-15 wt%), temperature (25 and 50 degrees C) and time (30 min-72 h). Fourier transform infrared spectroscopy and Raman spectroscopy were used for chemical analysis and qualitative analysis of the cellulose crystallinity due to the surface treatments; subsequently, mechanical strength of the fibres was tested by tensile testing. Weight loss, moisture regain and swelling measurements were taken before and after treatments, which showed the obvious changes in fibre properties on treatment. Heat capacity of the fibres was measured for untreated and treated fibres, and thermal degradation of fibres was examined to see the stability of fibres at elevated temperatures. Wettability and surface energies were measured using dynamic contact angle method in three wetting mediums. Scanning electron microscopy was used to study the morphological properties of the fibres.
引用
收藏
页码:637 / 654
页数:18
相关论文
共 55 条
[1]   A new method to visualize and characterize the pore structure of TENCEL® (Lyocell) and other man-made cellulosic fibres using a fluorescent dye molecular probe [J].
Abu-Rous, Mohammad ;
Varga, Ksenija ;
Bechtold, Thomas ;
Schuster, Kurt Christian .
JOURNAL OF APPLIED POLYMER SCIENCE, 2007, 106 (03) :2083-2091
[2]  
Agarwal R, 2006, INDIAN J PURE AP PHY, V44, P746
[3]   Activation energy and crystallization kinetics of untreated and treated oil palm fibre reinforced phenol formaldehyde composites [J].
Agrawal, R ;
Saxena, NS ;
Sharma, KB ;
Thomas, S ;
Sreekala, MS .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 277 (1-2) :77-82
[4]   Mechanical properties and water absorption behavior of composites made from a biodegradable matrix and alkaline-treated sisal fibers [J].
Alvarez, VA ;
Ruscekaite, RA ;
Vázquez, A .
JOURNAL OF COMPOSITE MATERIALS, 2003, 37 (17) :1575-1588
[5]   Morphology and properties of isotropic and oriented samples of cellulose fibre-polypropylene composites [J].
Amash, A ;
Zugenmaier, P .
POLYMER, 2000, 41 (04) :1589-1596
[6]  
[Anonymous], 1998, Comprehensive Cellulose Chemistry: Fundamentals and Analytical Methods, DOI 10.1002/3527601929.ch2c
[7]   Measurement and prediction of thermal conductivity for hemp fiber reinforced composites [J].
Behzad, T. ;
Sain, M. .
POLYMER ENGINEERING AND SCIENCE, 2007, 47 (07) :977-983
[8]  
Biganska O., 2002, Etude physico-chimique des solutions de cellulose dans la NMethylmorpholine- N-Oxyde
[9]   Effect of cellulose pulp type on the mercerizing behavior and physical properties of lyocell fibers [J].
Chae, DW ;
Choi, KR ;
Kim, BC ;
Oh, YS .
TEXTILE RESEARCH JOURNAL, 2003, 73 (06) :541-545
[10]   Crystallinity changes in lyocell and viscose-type fibres by caustic treatment [J].
Colom, X ;
Carrillo, F .
EUROPEAN POLYMER JOURNAL, 2002, 38 (11) :2225-2230