Nordic Pulp & Paper Research Journal最新文献

Development of fibre properties in mill scale: high- and low consistency refining of thermomechanical pulp (part 2) – Importance of fibre curl 磨浆机纤维性能的发展：热机械浆的高浓和低浓磨浆（第 2 部分）--纤维卷曲的重要性

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-09-18 DOI: 10.1515/npprj-2024-0049

Rita Ferritsius, Christer Sandberg, Mats Rundlöf, Olof Ferritsius, Geoffrey Daniel, Birgitta A. Engberg, Fritjof Nilsson

{"title":"Development of fibre properties in mill scale: high- and low consistency refining of thermomechanical pulp (part 2) – Importance of fibre curl","authors":"Rita Ferritsius, Christer Sandberg, Mats Rundlöf, Olof Ferritsius, Geoffrey Daniel, Birgitta A. Engberg, Fritjof Nilsson","doi":"10.1515/npprj-2024-0049","DOIUrl":"https://doi.org/10.1515/npprj-2024-0049","url":null,"abstract":"Increased knowledge on the correlation between pulp processing, fibre-properties and paper properties is required to improve fibre-based products. Part 1 of this investigation deals with the effects of HC and LC refining on fibre properties development. LC refining reduced curl and increased tensile index in a manner similar to hot disintegration whereas HC refining increased curl slightly. In this second part, the correlation between fibre curl and handsheet properties of thermomechanical pulp, subjected to low consistency (LC) refining and hot/cold disintegration is examined. Fibre curl decreased by laboratory disintegration and LC refining and showed a linear correlation with increased tensile index and tensile stiffness. Evaluation of fibre property distributions gave a more detailed description of the development of fibre properties. These revealed that disintegration and LC refining gave different fibre curl versus fibre length distributions, even when their average values were similar. These results confirm that analysing fibre property distributions contributes to a more detailed knowledge of the development of pulp quality. Hot disintegration before laboratory testing exaggerated pulp quality and increase internal fibrillation and can therefore be questioned. When hot disintegration is performed before pulp analyses, the impact of LC refining on paper properties may be misjudged.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"187 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142252645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence mechanism of paper mechanical properties: numerical simulation and experimental verification based on a fiber network 纸张机械特性的影响机制：基于纤维网络的数值模拟和实验验证

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-30 DOI: 10.1515/npprj-2024-0021

Hao Sun, Yaling Wang, Haojin Li, Lingjun Wei, Yunfeng Zhu, Wanlu Zhang, Wei Wang

{"title":"Influence mechanism of paper mechanical properties: numerical simulation and experimental verification based on a fiber network","authors":"Hao Sun, Yaling Wang, Haojin Li, Lingjun Wei, Yunfeng Zhu, Wanlu Zhang, Wei Wang","doi":"10.1515/npprj-2024-0021","DOIUrl":"https://doi.org/10.1515/npprj-2024-0021","url":null,"abstract":"Paper is a kind of renewable material that exists widely and has important application prospects. However, previous studies have mostly focused on the macromechanical properties of paper but lack micro theory based on paper fiber networks. We present a comprehensive experimental and computational study on the mechanical properties of fibers and fiber networks under the influence of microstructure. A beam-spring model was established based on a beam-fiber network to simulate the behavior of fiber networks. Simulations were performed to demonstrate the influence of fiber microstructural parameters such as fiber bond strength, stiffness, failure strength, size, and network density on mechanical features. Mechanical experiments verified that the fiber bond strength had a greater influence on the paper properties than did the fiber strength. This result is highly consistent with that of the model. All the simulations were validated by experimental measurements. Finally, we provided computational insights into the interfiber bond damage pattern with respect to different fiber microlevels and demonstrated that the proposed beam-spring model can be used to predict the response of fiber networks of paper materials. The above research can be used to optimize the formulation, process, and treatment of paper to meet specific application needs.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"2 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biobased nanocomposite coating of paper for packaging 生物基纳米复合包装纸涂层

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-27 DOI: 10.1515/npprj-2024-0034

Md. Nakib Hossen, M. Mostafizur Rahman, Taslima Ferdous, Jannatun Nayeem, M. Sarwar Jahan

{"title":"Biobased nanocomposite coating of paper for packaging","authors":"Md. Nakib Hossen, M. Mostafizur Rahman, Taslima Ferdous, Jannatun Nayeem, M. Sarwar Jahan","doi":"10.1515/npprj-2024-0034","DOIUrl":"https://doi.org/10.1515/npprj-2024-0034","url":null,"abstract":"Biobased coating material is required to replace synthetic polymer-based paper coating material for a safe and clean environment. The study aimed to investigate the use of biobased nanocomposites as a coating material for paper. The biobased nanocomposite was prepared using nanocellulose, sodium alginate (SA), and bio-synthesized silver nanoparticles (AgNPs). Nanocrystalline cellulose (NCC) was produced through acid hydrolysis, followed by fractionation. The average size of the crystals was 15 nm in width and 125 nm in length. AgNPs were prepared by the reduction of AgNO3 with lignin. The synthesis of silver nanoparticles was confirmed by UV–visible and FTIR spectroscopy. SA-NCC composite coating improved the barrier and strength properties of paper. The paper with composite coating demonstrated a 29.11 % increase in tensile index in the cross direction, 20.82 % increase in the machine direction, and 77.89 % improvement in burst index at a coating weight of 1.68 g/m2. The composite-coated paper showed better air barrier and lower water absorption characteristics than sodium alginate-coated paper. The incorporation of AgNPs in the coating mixture introduced the antimicrobial activity of the paper as well.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"9 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of oxygen delignified fibers with high water absorbency, as a greener alternative to fully bleached fibers for tissue paper 评估具有高吸水性的氧气脱木素纤维，作为纸巾用全漂白纤维的绿色替代品

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-26 DOI: 10.1515/npprj-2024-0024

Cláudia V.G. Esteves

{"title":"Evaluation of oxygen delignified fibers with high water absorbency, as a greener alternative to fully bleached fibers for tissue paper","authors":"Cláudia V.G. Esteves","doi":"10.1515/npprj-2024-0024","DOIUrl":"https://doi.org/10.1515/npprj-2024-0024","url":null,"abstract":"The potential of oxygen delignified fibers to replace fully bleached fibers in tissue products was investigated on softwood pulps. The absorption, mechanical properties and softness of laboratory tissue hand sheets from one commercial fully bleached pulp and five unbleached oxygen delignified lab pulps were compared. The pulps with different lignin content and total fiber charge were evaluated with and without PFI refining. The pulps subjected to oxygen delignification resulted in pulps with much higher total fiber charge content that led to higher swelling and higher wet strength when compared to the commercial fully bleached pulp. Some unbleached oxygen delignified pulps showed great potential in the absorption capacity, while others showed a much higher wet tensile strength when compared to the commercial pulp. Compared to the commercial bleached pulp, a similar softness for a higher wet and dry tensile index in the unbleached fibers was observed for the oxygen delignified pulps. Unbleached pulps subjected to an extended oxygen delignification proved to be a suitable alternative to fully bleached pulps in tissue grades, depending on the desired property (absorption or wet strength).","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"1 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of xylan-modified precipitated calcium carbonate filler on the properties of paper 木聚糖改性沉淀碳酸钙填料对纸张性能的影响

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-23 DOI: 10.1515/npprj-2024-0042

Onur Unlu, Ayse Aytac

{"title":"Effects of xylan-modified precipitated calcium carbonate filler on the properties of paper","authors":"Onur Unlu, Ayse Aytac","doi":"10.1515/npprj-2024-0042","DOIUrl":"https://doi.org/10.1515/npprj-2024-0042","url":null,"abstract":"The use of mineral-based fillers tends to reduce the mechanical properties of paper, which can limit their application. The filler surface modification is a significant treatment to overcome this limitation. This research aims to offer a novel modified mineral-based filler to provide its industrial application. The surface of precipitated calcium carbonate (PCC) was modified with xylan (XS), which is a type of hemicellulose, a polysaccharide consisting mainly of xylose residues. It is used as a filler at different filler dosage levels in paper pulp. Modified PCC(MPCC) was characterized with Fourier transform infrared spectroscopy, Thermogravimetric analysis, X-ray photoelectron spectroscopy, X-ray diffraction and Field-emission scanning electron microscopy analyses. The analysis demonstrated that the MPCC filler surface was coated with XS successfully. The effect of PCC and MPCC-filled hand-sheet paper physical, chemical and optical properties were studied. The experimental results showed that the mechanical (tensile, burst, tear strength) and optical (brightness, opacity) of hand-sheet paper filled with MPCC were significantly improved compared with unmodified PCC-filled paper at the same ash content. The filler retention of PCC and MPCC fillers in paper was investigated, and the MPCC filler showed better filler retention properties in paper stock than the PCC filler.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"15 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UV–vis spectroscopy as a rapid method for evaluation of total phenolic hydroxyl structures in lignin 紫外可见光谱法作为一种快速评估木质素中总酚羟基结构的方法

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-15 DOI: 10.1515/npprj-2023-0095

Nataliia Smyk, Jenny Sjöström, Gunnar Henriksson, Olena Sevastyanova

{"title":"UV–vis spectroscopy as a rapid method for evaluation of total phenolic hydroxyl structures in lignin","authors":"Nataliia Smyk, Jenny Sjöström, Gunnar Henriksson, Olena Sevastyanova","doi":"10.1515/npprj-2023-0095","DOIUrl":"https://doi.org/10.1515/npprj-2023-0095","url":null,"abstract":"Phenolic hydroxyl groups in lignin are crucial for understanding its structure, reactivity, and potential applications. Various methods have been developed for the determining phenolic groups in lignin. This study focuses on the comparison of a simple, cost-effective, and time-efficient UV–vis ionization difference technique with the highly accurate 31P NMR spectroscopy for analyzing lignin samples of different origins and isolation methods. The results were carefully evaluated, and the strengths and limitations of each method were discussed. Two eco-friendly UV–vis approaches were proposed for a rapid and comprehensive evaluation of the total phenolic-OH groups: one using a strong alkaline solution for analyzing common types of technical lignins, and another employing multipoint wavelength calculations, effective for analyzing softwood lignins regardless of the extraction method. Additionally, the research highlighted the importance of selecting appropriate model phenolic compounds to accurately assess the phenolic hydroxyl group content in lignins using the UV–vis method. Offering straightforward and rapid analysis, with results closely aligning with 31P NMR data, this method is a promising alternative for routine analysis.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"110 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of surfactants on the wettability of sodium propionate aqueous deacidification agent 表面活性剂对丙酸钠水溶液脱酸剂润湿性的影响

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-15 DOI: 10.1515/npprj-2023-0038

Ge Ge, Jianan Liu, Yunfei Liao, Deli Zeng, Hongyan Mou, Huiming Fan

{"title":"Effects of surfactants on the wettability of sodium propionate aqueous deacidification agent","authors":"Ge Ge, Jianan Liu, Yunfei Liao, Deli Zeng, Hongyan Mou, Huiming Fan","doi":"10.1515/npprj-2023-0038","DOIUrl":"https://doi.org/10.1515/npprj-2023-0038","url":null,"abstract":"To address the challenges of difficulty and low penetration speed of aqueous deacidification agents in paper, we aimed to enhance the wetting performance of these agents by incorporating a surfactant. We selected four surfactants for our study: anionic sodium dodecyl benzene sulfonate (SDBS), cationic cetyltrimethylammonium bromide (CTAB), nonionic polysorbate-80 (TW80), and polyether-modified trisiloxane (TRSE). The wetting properties of these surfactants on sodium propionate aqueous deacidification agent, the alkali stability of the solution, and the effects of moist heat aging on paper durability were explored. The results demonstrated that TRSE exhibited superior performance compared to the other three surfactants, effectively reducing the surface tension of sodium propionate solution to 21.02 mN/m. In alkaline conditions with a pH range of 8.00–10.00, the surface tension of SDBS, CTAB, and TW80 solutions remained stable for 30 days. Similarly, under weakly alkaline conditions with a pH value below 9, the surface tension of TRSE solutions exhibited stability. It should be noted that SDBS accelerated the decline of paper tensile index and whiteness during the heat and humidity aging process; at the same time, CTAB, TW80, and TRSE had no noticeable adverse effects on paper aging resistance.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"172 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid solar drying of sludge from kraft pulp mills 混合太阳能干燥牛皮纸浆厂污泥

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-05 DOI: 10.1515/npprj-2023-0094

Lindomar Matias Gonçalves, Clara Mendoza-Martinez, Jesús Nuncira, Elém Patrícia Alves Rocha, Eduardo Coutinho de Paula, Marcelo Cardoso

{"title":"Hybrid solar drying of sludge from kraft pulp mills","authors":"Lindomar Matias Gonçalves, Clara Mendoza-Martinez, Jesús Nuncira, Elém Patrícia Alves Rocha, Eduardo Coutinho de Paula, Marcelo Cardoso","doi":"10.1515/npprj-2023-0094","DOIUrl":"https://doi.org/10.1515/npprj-2023-0094","url":null,"abstract":"Sludge generated from kraft pulp mill wastewater treatment plants (WWTPs) is typically non-inert solid waste and is commonly disposed of in landfills. In this study, a novel approach for repurposing WWTP sludge from a kraft pulp mill in Brazil for energy generation was assessed. With the global cellulose market projected to reach $ 61 billion by 2033, there is a growing need for sustainable energy solutions and disposal of associated industrial byproducts. This study investigated the performance of a hybrid active solar dryer for reducing the moisture content of sludge to enhance the feasibility of sludge burning in a biomass boiler. Through rigorous experimentation and design of experiments (DOE) planning, optimal parameters for the hybrid dryer were determined, specifically, a volumetric airflow rate of 1.1 m/s and an entrance temperature of approximately 51 °C. This innovative approach not only addresses the environmental concerns associated with sludge disposal, but also contributes to the broader goal of advancing sustainable technologies in the midst of global energy challenges.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"48 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The study of citric acid crosslinked β-cyclodextrin/hydroxypropyl cellulose food preservation film 柠檬酸交联β-环糊精/羟丙基纤维素食品保鲜膜的研究

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-08-05 DOI: 10.1515/npprj-2023-0088

Yefan Wang, Ting Wang, Xinyu Zhang, Qian Wang, Sheng Liu, Zhihua Guo, Haitang Liu

{"title":"The study of citric acid crosslinked β-cyclodextrin/hydroxypropyl cellulose food preservation film","authors":"Yefan Wang, Ting Wang, Xinyu Zhang, Qian Wang, Sheng Liu, Zhihua Guo, Haitang Liu","doi":"10.1515/npprj-2023-0088","DOIUrl":"https://doi.org/10.1515/npprj-2023-0088","url":null,"abstract":"In this study, hydroxypropyl cellulose (HPC) was utilized as the raw material, with the addition of β-cyclodextrin (β-CD), citric acid (CA) as the crosslinking agent, and sodium hypophosphite (SHP) as the catalyst to produce hydroxypropyl cellulose/β-CD composite films. The inclusion of β-CD resulted in an increase in the tensile strength of the film, with the maximum value of 13.5 MPa for the 1 % β-CD composite membrane. Additionally, after degradation in soil for 28 days, the degradation ability was significantly enhanced, with the 1.0 % β-CD composite film exhibiting the highest degradation rate of 27.21 %. Furthermore, the water permeability of the composite membrane was improved with the addition of β-CD. Specifically, when the β-CD content was 1.0 %, the water vapor transmission reached its lowest point at 2,445 g* <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <m:mrow> <m:msup> <m:mrow> <m:mo>(</m:mo> <m:msup> <m:mi>m</m:mi> <m:mn>2</m:mn> </m:msup> <m:mrow> <m:mo>*</m:mo> <m:mn>24</m:mn> <m:mi>d</m:mi> </m:mrow> <m:mo>)</m:mo> </m:mrow> <m:mrow> <m:mo>−</m:mo> <m:mn>1</m:mn> </m:mrow> </m:msup> </m:mrow> </m:math> ${({m}^{2}ast 24d)}^{-1}$ . The findings demonstrated that the 1 % β-cyclodextrin/hydroxypropyl cellulose composite film effectively preserved the freshness of strawberries, reducing the weight loss rate by 1.65 % compared to the control group. In conclusion, this research highlights the potential for preparing composite membranes using HPC and β-CD crosslinking, thereby expanding the application of hydroxypropyl cellulose and β-CD in food preservation.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"74 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141949112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparing the in-plane shear moduli of cardboard measured by flexural vibration, torsional vibration, static torsion, off-axis vibration, and off-axis tension tests 通过挠曲振动、扭转振动、静态扭转、离轴振动和离轴拉伸试验测量的纸板平面内剪切模量比较

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-07-22 DOI: 10.1515/npprj-2023-0087

Hiroshi Yoshihara, Masahiro Yoshinobu, Makoto Maruta

引用次数: 0