Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps
Extraction of hemicelluloses prior to pulping and conversion of the extracted hemicelluloses to other bioproducts could provide additional revenue to traditional pulp and paper industries. The effect of hemicelluloses pre-extraction with a hydrothermal (HT) process on Pinus radiata chemimechanical p...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
North Carolina State University
2015-09-01
|
| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_7442_Reyes_Partial_Hemicelluloses_Pinus |
| _version_ | 1818511868026683392 |
|---|---|
| author | Pablo Reyes Miguel Pereira Regis Teixeira Mendonça |
| author_facet | Pablo Reyes Miguel Pereira Regis Teixeira Mendonça |
| author_sort | Pablo Reyes |
| collection | DOAJ |
| description | Extraction of hemicelluloses prior to pulping and conversion of the extracted hemicelluloses to other bioproducts could provide additional revenue to traditional pulp and paper industries. The effect of hemicelluloses pre-extraction with a hydrothermal (HT) process on Pinus radiata chemimechanical pulp (CMP) properties was investigated in this study. The HT extraction resulted in a release of 7% to 58% of the initial amount of hemicelluloses from the wood. The extraction yield increased with temperature and extraction time. This hemicellulosic fraction was in the form of low molar mass oligomers with molecular weights varying from 1.5 to 100 kDa. Compared with the control (unextracted) CMP pulp, the HT pre-extraction significantly reduced the refining energy to obtain a given fibrillation degree (freeness). The pulp yield with the HT/CMP process was in the range of 56% to 75%. Fiber properties of the pulps from pre-extracted wood, such as fiber length, were reduced, while increases in fiber width, fines content, fiber coarseness, and kink index were observed in comparison with the control pulps. The strength properties of CMP pulps decreased with increasing amounts of hemicellulose removal during the stage prior to pulping. |
| first_indexed | 2024-12-10T23:38:54Z |
| format | Article |
| id | doaj.art-002c166185af40a99f35e3c57824cc70 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-10T23:38:54Z |
| publishDate | 2015-09-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-002c166185af40a99f35e3c57824cc702022-12-22T01:29:06ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-09-011047442745410.15376/biores.10.4.7442-7454Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical PulpsPablo Reyes0Miguel Pereira1Regis Teixeira Mendonça2Laboratorio Recursos Renovables Centro de Biotecnología Universidad de Concepción; ChileLaboratorio de Productos Forestales, Facultad de Ingeniería, Universidad de Concepción; ChileLaboratorio Recursos Renovables, Centro de Biotecnología, Universidad de Concepción - Facultad de Ciencias Forestales, Universidad de Concepción; ChileExtraction of hemicelluloses prior to pulping and conversion of the extracted hemicelluloses to other bioproducts could provide additional revenue to traditional pulp and paper industries. The effect of hemicelluloses pre-extraction with a hydrothermal (HT) process on Pinus radiata chemimechanical pulp (CMP) properties was investigated in this study. The HT extraction resulted in a release of 7% to 58% of the initial amount of hemicelluloses from the wood. The extraction yield increased with temperature and extraction time. This hemicellulosic fraction was in the form of low molar mass oligomers with molecular weights varying from 1.5 to 100 kDa. Compared with the control (unextracted) CMP pulp, the HT pre-extraction significantly reduced the refining energy to obtain a given fibrillation degree (freeness). The pulp yield with the HT/CMP process was in the range of 56% to 75%. Fiber properties of the pulps from pre-extracted wood, such as fiber length, were reduced, while increases in fiber width, fines content, fiber coarseness, and kink index were observed in comparison with the control pulps. The strength properties of CMP pulps decreased with increasing amounts of hemicellulose removal during the stage prior to pulping.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_7442_Reyes_Partial_Hemicelluloses_PinusChemical pulpingFiber biometryHemicelluloses extractionPulp strength properties |
| spellingShingle | Pablo Reyes Miguel Pereira Regis Teixeira Mendonça Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps BioResources Chemical pulping Fiber biometry Hemicelluloses extraction Pulp strength properties |
| title | Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps |
| title_full | Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps |
| title_fullStr | Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps |
| title_full_unstemmed | Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps |
| title_short | Effect of Partial Pre-Extraction of Hemicelluloses on the Properties of Pinus radiata Chemimechanical Pulps |
| title_sort | effect of partial pre extraction of hemicelluloses on the properties of pinus radiata chemimechanical pulps |
| topic | Chemical pulping Fiber biometry Hemicelluloses extraction Pulp strength properties |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_7442_Reyes_Partial_Hemicelluloses_Pinus |
| work_keys_str_mv | AT pabloreyes effectofpartialpreextractionofhemicellulosesonthepropertiesofpinusradiatachemimechanicalpulps AT miguelpereira effectofpartialpreextractionofhemicellulosesonthepropertiesofpinusradiatachemimechanicalpulps AT registeixeiramendonca effectofpartialpreextractionofhemicellulosesonthepropertiesofpinusradiatachemimechanicalpulps |