Key role of anionic trash catching system on the efficiency of lignocellulose nanofibers in industrial recycled slurries

TARRÉS, QUIM; EHMAN, NANCI VANESA; TARRÉS, QUIM; EHMAN, NANCI VANESA; VALLEJOS, MARÍA EVANGELINA; MUTJÉ, PERE; VALLEJOS, MARÍA EVANGELINA; MUTJÉ, PERE; AREA, MARÍA CRISTINA; DELGADO-AGUILAR, MARC; AREA, MARÍA CRISTINA; DELGADO-AGUILAR, MARC

CELLULOSE (LONDON)

Springer

Año: 2017 vol. 25 p. 357 - 366

0969-0239

The processing of recycled paper into packaging materials is becomingone of the most important activities of paper mills. However, the use ofrecycled paper as a raw material causes an important increase of dissolvedcolloidal substances in industrial waters, known as anionic trash, whichgreatly increases water conductivity and cationic demand disturbing thefunction of commonly used retention agents (cationic starch, cationic polyacrylamides).On the other hand, several investigators showed that lignocellulosic nanofibers(LCNF) can be used as reinforcement in papermaking, but their retention can beaffected by anionic trash. This work aims to study the technical viability ofthe application of triticale straw lignocellulose nanofibers in recycled fibersuspensions at industrial scale. For this purpose, a complex retention systemof LCNF was proposed to improve the reinforcement efficiency of LCNF. Resultsshow that, with the addition of only 1.5% (w/w) of LCNF, it is possible tofulfill the physical?mechanical requirements of the commercial test liner, andthe addition of 4.5% of LCNF would allow the reduction of basis weight andadditives or the development of applications with higher mechanicalrequirements.