2026-04-17T01:40:25Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/229862024-06-18T12:07:56Zcom_2072_452955com_2072_2054col_2072_453062

2024-06-18T12:07:56Z urn:hdl:10256/22986 Innovative system based on natural polyelectrolyte complex and cellulose micro/nanofibers to improve drainability and properties of recycled paper Bastida, Gabriela A. Zanuttini, Miguel A. Tarrés Farrés, Joaquim Agustí Fiol Santaló, Núria Delgado Aguilar, Marc Galván, María V. Paper vell -- Reciclatge Waste paper -- Recycling Fibres de cel·lulosa Cellulose fibers Paper -- Fabricació Papermaking Nanofibres Nanofibers In this work, the efficiency of a polyelectrolyte complex (PEC) to retain different cellulose micro/nanofibers (CMNFs) during paper formation and to improve the physical properties of recycled unbleached fiber paper was analyzed. CMNFs were obtained from a commercial bleached eucalyptus pulp (BEP) using a PFI refiner followed by a chemical treatment with oxalic acid at two different concentrations. Finally, the pulp was fibrillated using a high-pressure homogenizer at three different intensities. The PEC was formed by addition of the xylan (Xyl) solution on chitosan (CH) solution with a Xyl/CH mass ratio of 80/20. The required dosages of PEC solution to neutralize the charges of different nanocellulose fractions were determined by ζ-potential measurements, and the CMNF retentions on recycled unbleached fibers were evaluated in a Britt Dynamic Drainage Jar. The results showed that the maximum retention was obtained when the neutral PEC-CMNF system was added to pulp. Besides, a significant decrease on °SR was observed when PEC and PEC-CMNF systems were added to the untreated pulp, limiting the negative effects of nanocellulose addition on pulp drainability. The incorporation of PEC-CMNF systems to the handsheets increased the tensile index (up to 28%), Mullen index (up to 40%) and internal bonding (up to 255%). Finally, the compressive strength of the handsheets, namely SCT and CMT, increased up to 30 and 70%, respectively. These simultaneous improvement on drainability and mechanical properties makes the proposed PEC-CMNF system a promising solution for the production of packaging paper The present work has been funded by: (a) Agencia I + D + i (PICT 2018 Nº 4410 and PICT 2019 N◦ 03246); (b) ASaCTeI Santa Fe IO 2018 Nº 0299; (c) CAI + D 2020 PI, Tipo II-N◦ 50620190100135LI; (d) CONICET; (e) RED CYTED NANOCELIA (Scholarship); (f) Spanish Ministry of Science and Innovation to the project CON-FUTURO-ES (PID2020-113850RB-C22); (g) Spanish Ministry of Science and Innovation to the project NextPack (PID2021-124766OA-I00) Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature 2024-06-18T12:07:56Z 2024-06-18T12:07:56Z 2023-05-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion peer-reviewed http://hdl.handle.net/10256/22986 info:eu-repo/semantics/altIdentifier/doi/10.1007/s10570-023-05223-7 info:eu-repo/semantics/altIdentifier/issn/0969-0239 info:eu-repo/semantics/altIdentifier/eissn/1572-882X PID2020-113850RB-C22 PID2021-124766OA-I00 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113850RB-C22/ES/DESARROLLO DEL CONOCIMIENTO PARA EL FUTURO USO DE NANOCELULOSAS EN UNA INDUSTRIA DE PAPEL SOSTENIBLE Y COMPETITIVA EN ESPAÑA/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021‐124766OA‐I00/ES/MATERIALES ACTIVOS BASADOS EN CELULOSA PARA LA NUEVA GENERACION DE EMBALAJE SOSTENIBLE PARA ALIMENTOS/ Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Springer Cellulose, 2023, vol. 30, p. 5895-5910 Articles publicats (D-EQATA)