TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Thébault, Marion
A1  - Li, Ya
A1  - Beuc, Christopher
A1  - Frömel-Frybort, Stephan
A1  - Zikulnig-Rusch, Edith
A1  - Kutuzova, Larysa
A1  - Kandelbauer, Andreas
T1  - Impregnated paper-based decorative laminates prepared from lignin-substituted phenolic resins
JF  - Journal of renewable materials : JRM
N2  - High Pressure Laminates (HPL) panels consist of stacks of self-gluing paper sheets soaked with phenol-formaldehyde (PF) resins. An important requirement for such PFs is that they must rapidly penetrate and saturate the paper pores. Partially substituting phenol with bio-based phenolic chemicals like lignin changes the physico-chemical properties of the resin and affects its ability to penetrate the paper. In this study, PF formulations containing different proportions of lignosulfonate and kraft lignin were used to prepare paper-based laminates. The penetration of a Kraft paper sheet was characterized by a recently introduced, new device measuring the conductivity between both sides of the paper sheet after a drop of resin was placed on the surface and allowed to penetrate the sheet. The main target value measured was the time required for a specific resin to completely penetrate the defined paper sample (“penetration time”). This penetration time generally depends on the molecular weight distribution, the flow behavior and the polarity of the resin which in turn are dependent on the manufacturing conditions of the resin. In the present study, the influences of the three process factors: (1) type of lignin material used for substitution, (2) lignin modification by phenolation and (3) degree of phenol substitution on the penetration times of various lignin-phenolic hybrid impregnation resins were studied using a complete twolevel three-factorial experimental design. Thin laminates made with the resins diluted in methanol were mechanically tested in terms of tensile and flexural strains, and their cross-sections were studied by light microscopy.
KW  - lignin
KW  - phenol-formaldehyde resin (PF)
KW  - decorative laminate
KW  - impregnated paper
Y1  - 2020
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:rt2-opus4-29198
SN  - 2164-6325
SS  - 2164-6325
U6  - https://doi.org/10.32604/jrm.2020.09755
DO  - https://doi.org/10.32604/jrm.2020.09755
VL  - 8
IS  - 10
SP  - 1181
EP  - 1198
S1  - 18
PB  - Tech Science Press
CY  - Henderson, Nevada
ER  -