Synthesis of Wood Lignin-Urea-Formaldehyde Resin Adhesive
2012 ◽
Vol 560-561
◽
pp. 242-246
◽
Keyword(s):
Lignin-urea-formaldehyde resin adhesive was synthesized with alkali lignin from gramineae waste pulping liquor. Alkali lignin was purified and hydroxymethylated with HCHO and then crosslinked with urea-formaldehyde resin, polyvinyl alcohol and melamine. Results showed that lignin content in purified alkali lignin was 86.91%, both binding strength and free HCHO content of urea-formaldehyde resin synthesized from hydroxymethylated lignin reached the optimum value. The proper lignin amount for preparing resin was 30%, and the binding strength at this condition was 4.56MPa, and free formaldehyde content was 0.049%.
2013 ◽
Vol 774-776
◽
pp. 1232-1236
Keyword(s):
Keyword(s):
2011 ◽
Vol 197-198
◽
pp. 147-150
◽
1968 ◽
Vol 17
(175)
◽
pp. 332-334
2012 ◽
Vol 427
◽
pp. 148-152
◽
2014 ◽
Vol 04
(02)
◽
pp. 29-35
Keyword(s):