Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride)
Polyelectrolytes containing amine functional groups such as PAH (poly(allylamine hydrochloride)) can be useful, under certain conditions, for improving paper strength. In this work, the charge density of PAH was determined at different pH and ionic strengths; PAH adsorption onto the cellulosic fiber...
| Autores: | ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2011 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/74856 |
| Acceso en línea: | http://hdl.handle.net/11336/74856 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | ADSORPTION ISOTHERMS Amine group-containing polymers Charge density Page equation Recycling https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
| _version_ | 1878403674145816576 |
|---|---|
| author | Mocchiutti, Paulina |
| author2 | Galván, María Verónica Inalbon, Maria Cristina Zanuttini, Miguel Angel Mario |
| author2_role | author author author |
| author_browse | Galván, María Verónica Inalbon, Maria Cristina Mocchiutti, Paulina Zanuttini, Miguel Angel Mario |
| author_facet | Mocchiutti, Paulina Galván, María Verónica Inalbon, Maria Cristina Zanuttini, Miguel Angel Mario |
| author_role | author |
| collection | CONICET Digital (CONICET) |
| description | Polyelectrolytes containing amine functional groups such as PAH (poly(allylamine hydrochloride)) can be useful, under certain conditions, for improving paper strength. In this work, the charge density of PAH was determined at different pH and ionic strengths; PAH adsorption onto the cellulosic fibers was characterized, and the effects of low PAH dosage on the papermaking properties were evaluated. It was found that the ionization of PAH is complete in acid media, but it is partial and depends on the ionic strength in neutral media. The adsorption isotherms of PAH on a recycled pulp from kraft liner allowed us to determine the amount needed to saturate the adsorption capacity of the fibers. For the three ionic strengths analyzed, the swelling of the fibers decreased when PAH was added in an amount corresponding to saturation (0.23% PAH on dried pulp). Nevertheless, the swelling was recovered when the amount of PAH was the double the saturation level (0.46% PAH on dried pulp). At these levels of addition, the papermaking properties were clearly improved, especially compressive strengths SCT (short compressive test) and CMT (concora medium test). The Page equation of tensile strength showed that PAH improved the shear bond strength, while the relative bonding area slightly decreased. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | AR_ab505b56c8a0e78ed2dea6727e2f01ec |
| identifier_str_mv | Mocchiutti, Paulina; Galván, María Verónica; Inalbon, Maria Cristina; Zanuttini, Miguel Angel Mario; Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride); North Carolina State University. Department of Forest Biomaterials; Bioresources; 6; 1; 1-2011; 570-583 1930-2126 CONICET Digital CONICET |
| institution | Consejo Nacional de Investigaciones Científicas y Técnicas |
| instname_str | Consejo Nacional de Investigaciones Científicas y Técnicas |
| language | eng |
| network_acronym_str | AR |
| network_name_str | Argentina |
| oai_identifier_str | oai:ri.conicet.gov.ar:11336/74856 |
| publishDate | 2011 |
| publishDateSort | 2011 |
| publisher | North Carolina State University. Department of Forest Biomaterials |
| publisherStr | North Carolina State University. Department of Forest Biomaterials |
| reponame_str | CONICET Digital (CONICET) |
| spelling | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) Mocchiutti, Paulina Galván, María Verónica Inalbon, Maria Cristina Zanuttini, Miguel Angel Mario ADSORPTION ISOTHERMS Amine group-containing polymers Charge density Page equation Recycling https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 Polyelectrolytes containing amine functional groups such as PAH (poly(allylamine hydrochloride)) can be useful, under certain conditions, for improving paper strength. In this work, the charge density of PAH was determined at different pH and ionic strengths; PAH adsorption onto the cellulosic fibers was characterized, and the effects of low PAH dosage on the papermaking properties were evaluated. It was found that the ionization of PAH is complete in acid media, but it is partial and depends on the ionic strength in neutral media. The adsorption isotherms of PAH on a recycled pulp from kraft liner allowed us to determine the amount needed to saturate the adsorption capacity of the fibers. For the three ionic strengths analyzed, the swelling of the fibers decreased when PAH was added in an amount corresponding to saturation (0.23% PAH on dried pulp). Nevertheless, the swelling was recovered when the amount of PAH was the double the saturation level (0.46% PAH on dried pulp). At these levels of addition, the papermaking properties were clearly improved, especially compressive strengths SCT (short compressive test) and CMT (concora medium test). The Page equation of tensile strength showed that PAH improved the shear bond strength, while the relative bonding area slightly decreased. Fil: Mocchiutti, Paulina. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina Fil: Galván, María Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina Fil: Inalbon, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina Fil: Zanuttini, Miguel Angel Mario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Instituto de Tecnología Celulósica; Argentina North Carolina State University. Department of Forest Biomaterials http://hdl.handle.net/11336/74856 Mocchiutti, Paulina; Galván, María Verónica; Inalbon, Maria Cristina; Zanuttini, Miguel Angel Mario; Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride); North Carolina State University. Department of Forest Biomaterials; Bioresources; 6; 1; 1-2011; 570-583 1930-2126 CONICET Digital CONICET |
| spellingShingle | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) Mocchiutti, Paulina ADSORPTION ISOTHERMS Amine group-containing polymers Charge density Page equation Recycling https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
| status_str | publishedVersion |
| title | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) |
| title_full | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) |
| title_fullStr | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) |
| title_full_unstemmed | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) |
| title_short | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) |
| title_sort | Improvement of Paper Properties of Recycled Unbleached Softwood Kraft Pulps by Poly(Allylamine Hydrochloride) |
| topic | ADSORPTION ISOTHERMS Amine group-containing polymers Charge density Page equation Recycling https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
| topic_facet | ADSORPTION ISOTHERMS Amine group-containing polymers Charge density Page equation Recycling https://purl.org/becyt/ford/2.5 https://purl.org/becyt/ford/2 |
| url | http://hdl.handle.net/11336/74856 |