Enhancing environmental performance of formaldehyde-based adhesives in lignocellulosic composites

被引:10
作者
Basta, AH [1 ]
El-Saied, H [1 ]
Gobran, RH [1 ]
Sultan, MZ [1 ]
机构
[1] Drexel Univ, Philadelphia, PA 19104 USA
关键词
urea-formaldehyde; low free-formaldehyde adhesive; lignocellulosic composite; low-toxicity lignocellulosic composite;
D O I
10.1081/PPT-120038066
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The aim of this work is to produce less toxic lignocellulosic composites from agricultural wastes such as sugar-cane bagasse by using conventional urea-formaldehyde adhesives. Two approaches were studied: the first focused on using certain inorganic ammonium salts as accelerators for cross-linking of the formaldehyde-based adhesive, while the second focused on using organic additives capable of scavenging free formaldehyde. The effect of these additives on the percentage of free formaldehyde in adhesive system and the adhesion properties (physical and mechanical properties) of the composites produced were examined. The concentration and type of additives used to achieve high board properties were optimized. The behavior of the additives as fire retardants also was examined by using thermogravimetric analysis. The thermal degradation behavior of some of the composites has been studied by means of nonisothermal thermogravimetric analysis, and the kinetic parameters were estimated.
引用
收藏
页码:821 / 845
页数:25
相关论文
共 18 条
[1]   KINETIC-STUDIES ON THE PYROLYTIC DEGRADATION OF PHENOLIC RESIN PAPER SHEETS USING DTA TECHNIQUE .2. PHENOLIC RESINS AS BEATER ADDITIVES [J].
BASTA, AH ;
SEFAIN, MZ ;
ELWAKIL, NA .
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, 1994, 33 (02) :135-147
[2]  
BLAIR A, 1986, J NATL CANCER I, V76, P1071
[3]   KINETIC PARAMETERS FROM THERMOGRAVIMETRIC DATA [J].
COATS, AW ;
REDFERN, JP .
NATURE, 1964, 201 (491) :68-&
[4]   FORMALDEHYDE EXPOSURE AND NASOPHARYNGEAL CANCER - RE-EXAMINATION OF THE NATIONAL-CANCER-INSTITUTE STUDY AND AN UPDATE OF ONE PLANT [J].
COLLINS, JJ ;
CAPOROSSI, JC ;
UTIDJIAN, HMD .
JOURNAL OF THE NATIONAL CANCER INSTITUTE, 1988, 80 (05) :376-377
[5]  
ELBERT AA, 1985, CHIMICESKAJA TECHNOL, V224
[6]   C-13 NMR ANALYSIS METHOD FOR UREA-FORMALDEHYDE RESIN STRENGTH AND FORMALDEHYDE EMISSION [J].
FERG, EE ;
PIZZI, A ;
LEVENDIS, DC .
JOURNAL OF APPLIED POLYMER SCIENCE, 1993, 50 (05) :907-915
[7]  
Gosselin R.E., 1984, CLIN TOXICOLOGY COMM, pII
[8]   QUANTITATIVE C-13 NMR-STUDY OF UREA FORMALDEHYDE RESINS IN RELATION TO THE FORMALDEHYDE EMISSION LEVELS [J].
KIM, MG ;
AMOS, LW .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1990, 29 (02) :208-212
[9]  
*MIN IND PUBL SECT, 1985, RAW LIGN PAP IND YEA
[10]  
NUNN AJ, 1990, BRIT J IND MED, V47, P747