Nordic Pulp & Paper Research Journal最新文献_第3页

A review on chemical mechanisms of kraft pulping 牛皮纸制浆化学机制综述

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-05-13 DOI: 10.1515/npprj-2023-0015

Gunnar Henriksson, Ulf Germgård, Mikael E. Lindström

引用次数: 0

Alkaline treatment and fractionation of OCC for strength improvement 碱性处理和分馏 OCC 以提高强度

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-30 DOI: 10.1515/npprj-2024-0008

M. Nakib Hossen, M. Mostafizur Rahman, Sharmin Islam, M. Sarwar Jahan

{"title":"Alkaline treatment and fractionation of OCC for strength improvement","authors":"M. Nakib Hossen, M. Mostafizur Rahman, Sharmin Islam, M. Sarwar Jahan","doi":"10.1515/npprj-2024-0008","DOIUrl":"https://doi.org/10.1515/npprj-2024-0008","url":null,"abstract":"The main drawback of recycled fibers is the deterioration of fiber bonding dependent papermaking properties (like tensile, tear and burst indexes) due to the hornification effect, as a results of drying during papermaking. In order to improve the papermaking properties through increasing fiber bonding, an alkaline treatment of Old Corrugated Cardboard (OCC) followed by fractionation were carried out in this investigation. Alkaline treatment dissolved 6.6 % organics (carbohydrates and lignin) and fibers became wider as a results of fiber swelling. The alkali treatment decreased fines from 39.9 % to 28.5 %, consequently, decreased drainage resistance from 26 °SR to 21 °SR. The papermaking properties of OCC pulp increased on alkaline treatment. Fiber fractionation of alkaline treated OCC further increased papermaking properties. At 40 °SR value, the tensile index, burst index and tear index of alkaline treated longer fiber fraction was 49 N m/g, 3.2 kPa m2/g, 7.2 mN m2/g, respectively while it was 40.4 N m/g, 2.1 kPa m2/g and 6.1 kPa m2/g, for non-treated longer fiber fraction, respectively.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"68 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140826662","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

Rate-dependent tensile properties of paperboard and its plies 纸板及其层压材料随速率变化的拉伸特性

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-27 DOI: 10.1515/npprj-2024-0012

Satyasarathi Poddar, Eskil Andreasson, Mikael Nygårds

{"title":"Rate-dependent tensile properties of paperboard and its plies","authors":"Satyasarathi Poddar, Eskil Andreasson, Mikael Nygårds","doi":"10.1515/npprj-2024-0012","DOIUrl":"https://doi.org/10.1515/npprj-2024-0012","url":null,"abstract":"Tensile properties of paperboard have been characterized, and it has been shown that paper tensile properties are dependent on the strain rate. Tensile testing was done using strain rates in the range 10−4–3 s−1, which corresponds to crosshead movements ranging from 1 up to 24,000 mm/min, using an electro-mechanical testing machine. Two paperboards, and its free-laid top, middle and bottom plies were characterized in MD and CD. The testing was limited by the maximum crosshead speed of the testing machine. Initially 50 mm (grip to grip) long samples were tested, but to test even higher strain rates also short samples with length of 5 mm were tested. The results showed that ultimate strength increased by 9 % per decade increasing of testing rate, and Young’s modulus increased by 7 %. This shows that the previously reported rule of thumb of 10 % increase of in-plane strength per decade increase of strain rate holds. The testing here shows that this is valid also at strain rates as high as 3 s−1. Moreover, the strain at break in CD for long tensile specimens was observed to decrease when the strain rate exceeded 0.1 s−1, which resulted in straighter crack paths.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"6 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140810660","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

Analysis of polydisperse polymer adsorption on porous cellulose fibers 多孔纤维素纤维上的多分散聚合物吸附分析

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-26 DOI: 10.1515/npprj-2023-0058

Robert H. Pelton, Abdollah Karami, Jose Moran-Mirabal

{"title":"Analysis of polydisperse polymer adsorption on porous cellulose fibers","authors":"Robert H. Pelton, Abdollah Karami, Jose Moran-Mirabal","doi":"10.1515/npprj-2023-0058","DOIUrl":"https://doi.org/10.1515/npprj-2023-0058","url":null,"abstract":"The adsorption of cationic water-soluble polymers onto negatively charged porous wood pulp fibers is an essential aspect of papermaking. Adsorption data can be displayed as a direct plot of the amount adsorbed, Γ, versus the amount of polymer added or as an isotherm plot showing the amount adsorbed versus the residual unadsorbed polymer. In either data presentation, the analysis is more transparent if the units of each axis are the same (e.g., mg/g or meq/g), giving dimensionless slopes. Values for Γmax, ΓI, f I , and Γme can be extracted from many isotherms where: Γmax is the maximum capacity of the fibers to adsorb polymer; ΓI is the y-axis isotherm intercept and gives the maximum dose that can be fully adsorbed; f I is the slope of the direct plot at ΓI, and f I is the mass fraction of the added polymer that can access interior (pore) surfaces; and, Γme is the saturated amount of polymer adsorbed on exterior surfaces. Additionally, the molecular weight distribution of the adsorbing polymer in conjunction with the adsorption isotherm can be used to estimate the molecular weight distributions of adsorbed polymer on interior and exterior fiber surfaces as functions of the polymer dose.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"27 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140801161","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 of spent liquor obtained from SO2–ethanol–water (SEW) fractionation of Eucalyptus on drifting sands stabilization 桉树二氧化硫-乙醇-水（SEW）分馏产生的废液对流沙稳定的影响

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-16 DOI: 10.1515/npprj-2023-0082

Mohammadreza Dehghani Firouzabadi, Aliasghar Tatari

{"title":"Influence of spent liquor obtained from SO2–ethanol–water (SEW) fractionation of Eucalyptus on drifting sands stabilization","authors":"Mohammadreza Dehghani Firouzabadi, Aliasghar Tatari","doi":"10.1515/npprj-2023-0082","DOIUrl":"https://doi.org/10.1515/npprj-2023-0082","url":null,"abstract":"The utilization of mulch stands as a paramount approach in the management of wind erosion and the stabilization of soil and drifting sands. This study aimed to explore the impact of various concentrations of spent liquor (20 %, 30 %, and 50 % v/v) derived from SO2–ethanol–water (SEW) fractionation of Eucalyptus wood on the physical and mechanical properties of sand. These properties encompassed moisture content, thickness, temperature, electrical conductivity (EC), wind erodibility, penetration resistance, and seed germination. The findings revealed that the highest compressive strength (0.76 MPa) was attained with mulch consisting of 50 % SEW spent liquor, resulting in a 3.3-fold increase in penetration resistance compared to the control treatment. Furthermore, the 20 % concentration of spent liquor did not adversely affect the germination of black saxaul (Haloxylon ammodendron), whereas the lowest seed germination rate was associated with the 50 % concentration. Based on the measured parameters, the optimal mulch treatment for stabilizing drifting sands was identified as mulch with a 50 % (v/v) concentration. This study underscores the efficacy of SEW spent liquor in dust control and mitigating its environmental impacts, thus highlighting its potential in sustainable soil management practices.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"24 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140609771","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

Strength and thermal insulation properties of foam-formed ceramic fiber paper with different reinforcement methods 采用不同加固方法的泡沫成型陶瓷纤维纸的强度和隔热性能

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-15 DOI: 10.1515/npprj-2023-0086

Fuqing Hou, Nengxin Ding, Huikang Yang, Mengle Huang, Chunhui Zhang

{"title":"Strength and thermal insulation properties of foam-formed ceramic fiber paper with different reinforcement methods","authors":"Fuqing Hou, Nengxin Ding, Huikang Yang, Mengle Huang, Chunhui Zhang","doi":"10.1515/npprj-2023-0086","DOIUrl":"https://doi.org/10.1515/npprj-2023-0086","url":null,"abstract":"Foam-forming technique imparts ceramic fiber paper with excellent uniformity, low density, and high porosity, but its strength loss must be compensated. Herein, a flexible and rigid foam-formed ceramic fiber network was manufactured by using different strength improvement methods and simultaneously investigated their strength and thermal insulation properties. Sufficient strength (1136 kPa) was achieved by combining Polyvinyl alcohol (PVA) 2 % and Polyester (PET) 3 %. However, the tensile strength of fiber networks would decrease under the contribution of inter-fiber bonding area reduced when the fiber length was longer than 24 mm. Benefiting from the developed flocculation system (aluminum sol-anionic polyacrylamide-carboxymethylcellulose), the strength of the foam-formed ceramic fiber network was 20 kPa, the retention rate increased from 75 % to 88 %, and the average aggregation factor of fillers in the Z direction was 0.67. By adjusting the ratio and Z-directional distribution of functional fillers, the sintered foam-formed paper with a tensile strength of 1300 kPa and compressive strength of 1000 kPa could be obtained. The thermal insulation performance (thermal conductivity 0.03252 W/(m·K)) was similar to the quartz fiber paper reinforced silica airgel, and the flame resistance was better than the commercialized aluminum silicate wool board.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"75 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576173","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

Production of recycled paper using harmless municipal sludge as a new biomass filler 利用无害市政污泥作为新的生物质填料生产再生纸

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-15 DOI: 10.1515/npprj-2024-0007

Hao Sun, Xiyu Chen, Lingjun Wei, Jieyu Cui, Wanlu Zhang, Longfei Liu

{"title":"Production of recycled paper using harmless municipal sludge as a new biomass filler","authors":"Hao Sun, Xiyu Chen, Lingjun Wei, Jieyu Cui, Wanlu Zhang, Longfei Liu","doi":"10.1515/npprj-2024-0007","DOIUrl":"https://doi.org/10.1515/npprj-2024-0007","url":null,"abstract":"Due to a shortage of resources, exploring new biomass fillers has become critical for paper making. In this study, we reported an eco-friendly strategy for fabricating low-cost and efficient recycled paper with high mechanical properties using corrugated cardboard waste paper and harmless municipal sludge (HMS). First, the characteristics of HMS, including the particle size, pH, specific surface area, organic functional groups and organic component content, were analyzed. Then, the influence of the amount of HMS on the properties of the recycled paper was studied. Finally, the strengthening mechanism of biomass filling recycled paper was discussed. The results showed that HMS, a biomass filler for recycled paper preparation, exhibited excellent physical and chemical properties, with a median particle size of 6.395 μm, a surface area of 39.974 m2 g−1 and organic functional groups. The tensile index of the recycled paper with 30 % HMS was 13.10 Nm/g, which was 16.4 % greater than that of the unfilled paper and showed better thermal stability. This excellent performance could be attributed to the uniform distribution of HMS on the fiber surface, which improved the accessibility of hydrogen bond formation between fibers. Thus, this study proved that HMS was an excellent biomass filler for producing recycled paper.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"13 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576172","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

Monitoring solids content development in pilot-scale through air drying of tissue paper 通过空气干燥纸巾，监测中试规模的固体含量发展情况

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-15 DOI: 10.1515/npprj-2023-0092

Björn Sjöstrand, Viktor Bergström

{"title":"Monitoring solids content development in pilot-scale through air drying of tissue paper","authors":"Björn Sjöstrand, Viktor Bergström","doi":"10.1515/npprj-2023-0092","DOIUrl":"https://doi.org/10.1515/npprj-2023-0092","url":null,"abstract":"This study delves into the dynamic evolution of solids content in a pilot-scale through air drying tissue machine, aiming to enhance comprehension and refine optimization strategies for tissue manufacturing. It focuses on development of solids content throughout the process. Analyzing the interaction between process parameters and solids content provides deeper insights into water removal dynamics. The research employs solid contents monitoring techniques in pilot scale, offering a detailed view of solids content evolution from the wet web’s inception to the final tissue product. It significantly highlights the impact of key parameters, particularly pulp refining, on solids content across all positions of the pilot machine. Additionally, the study emphasizes the influence of vacuum system configurations, identifying the relationship between energy expended in the vacuum system and evaporation energy. Furthermore, the results indicate that compression and air displacement dewatering in vacuum boxes are less speed-sensitive compared to heat-driven evaporation in the TAD- and Yankee cylinders. Solid contents at all positions in the tissue machine correlates between various dewatering elements. Optimizing site-specific dewatering and evaporation strategies can potentially save drying energy in the Yankee drying phase which hold promise for enhanced energy and resource utilization, aligning with demands for sustainable manufacturing practices.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"251 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576187","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

Heterogeneity characterization of commercial structural papers 商业结构论文的异质性特征描述

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-08 DOI: 10.1515/npprj-2023-0080

John Considine, D. Steven Keller, Matthew A. Arvanitis, Xiaoyan Tang

引用次数: 0

Fabrication of modified lignin-based liquid mulching film and its potential application 改性木质素基液体地膜的制作及其潜在应用

IF 1.2 4区农林科学

Nordic Pulp & Paper Research Journal Pub Date : 2024-04-02 DOI: 10.1515/npprj-2023-0071

Zhonghua Sun, Jie Liang, Menghua Qin, Ruxia Ning, Xin Liu, Wei Sun, Xiang Li

引用次数: 0