A. Darwis, T. Karliati, Sutrisno, E. M. Alamsyah, Alfi Rumidatul, L. Melani, H. Kim, A. H. Iswanto, W. Fatriasari
Abstract Jabon (Anthocephalus cadamba) is a promising plant species with straight, visually pleasing trunks that can be harvested at a young age as a resource for pulp and paper production due to the rapid growth rate possessed. Therefore, this study aims to investigate the chemical composition and fiber biometry of 3, 6, and 9-year-old Jabon wood, determining their suitability as a pulp and paper raw material. Samples were collected from both stem and branch sections and analyzed according to the Tappi standard. Fiber cell maceration was conducted to enable the precise measurement of fiber dimensions and derivatives. The results showed high cellulose, holocellulose, and lignin content in Jabon wood, with low to moderate levels of extractives and ash. Additionally, the crystallinity index (CrI) increased with age, particularly from 3 to 9 years old. The branch of the plant, with Grade II fiber derivative quality, had lower CrI compared to the stem, while the inner stem showed a lesser value than the outer part. In conclusion, 3-year-old Jabon wood is a potential raw material for pulp and paper production.
{"title":"Chemical properties, crystallinity, and fiber biometry of Jabon (Anthocephalus cadamba) wood for pulp raw material: the effect of age and position","authors":"A. Darwis, T. Karliati, Sutrisno, E. M. Alamsyah, Alfi Rumidatul, L. Melani, H. Kim, A. H. Iswanto, W. Fatriasari","doi":"10.1515/npprj-2023-0053","DOIUrl":"https://doi.org/10.1515/npprj-2023-0053","url":null,"abstract":"Abstract Jabon (Anthocephalus cadamba) is a promising plant species with straight, visually pleasing trunks that can be harvested at a young age as a resource for pulp and paper production due to the rapid growth rate possessed. Therefore, this study aims to investigate the chemical composition and fiber biometry of 3, 6, and 9-year-old Jabon wood, determining their suitability as a pulp and paper raw material. Samples were collected from both stem and branch sections and analyzed according to the Tappi standard. Fiber cell maceration was conducted to enable the precise measurement of fiber dimensions and derivatives. The results showed high cellulose, holocellulose, and lignin content in Jabon wood, with low to moderate levels of extractives and ash. Additionally, the crystallinity index (CrI) increased with age, particularly from 3 to 9 years old. The branch of the plant, with Grade II fiber derivative quality, had lower CrI compared to the stem, while the inner stem showed a lesser value than the outer part. In conclusion, 3-year-old Jabon wood is a potential raw material for pulp and paper production.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"16 4","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138589683","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}
Pub Date : 2023-12-07eCollection Date: 2024-01-01DOI: 10.29399/npa.28495
Saltuk Buğra Baltacı, Erkut Tutkun, Mustafa Ayyıldız, Erdal Ağar, Gökhan Arslan, Rasim Moğulkoç, Abdülkerim Kasım Baltacı
Introduction: This study aimed to investigate the effects of chronic swimming exercise and vitamin E administration on elemental levels in the bone tissue of epileptic rats.
Methods: Forty-eight rats were divided into six groups: Control, Swimming, Swimming + vitamin E, Swimming + Epilepsy, Swimming + Epilepsy + vitamin E, and Epilepsy. Vitamin E was administered to the animals chronically by gavage at a dose of 500 mg/kg every other day for 3 months. Epileptiform activity was induced with penicillin in animals 24 hours after the last vitamin E intake. The exercise program consisted of daily 30-minute swimming sessions. At the end of the treatment period, the levels of calcium, chromium, copper, iron, magnesium, manganese, lead, and zinc (µg/gram tissue) in bone tissue samples were measured using an atomic emission device.
Results: The results showed that all epileptic groups had significantly lower bone chromium levels compared to the control groups (p<0.05). The epileptic, and epileptic swimming groups had the lowest levels of bone calcium, magnesium, and zinc (p<0.05). Vitamin E administration resulted in a significant increase in bone calcium, magnesium, and zinc levels in the epileptic swimming group with vitamin E compared to the epileptic and epileptic swimming groups. (p<0.05).
Conclusion: The findings of the study show that the administration of vitamin E improves calcium, magnesium, and zinc metabolism in the deteriorated bone tissue of the epileptic rat model.
引言本研究旨在探讨长期游泳运动和服用维生素 E 对癫痫大鼠骨组织中元素水平的影响：方法：将 48 只大鼠分为 6 组：对照组、游泳组、游泳 + 维生素 E 组、游泳 + 癫痫组、游泳 + 癫痫 + 维生素 E 组和癫痫组。给动物长期灌胃维生素 E，剂量为 500 毫克/千克，每隔一天灌胃一次，连续灌胃 3 个月。在最后一次摄入维生素 E 24 小时后，用青霉素诱导动物出现癫痫样活动。运动项目包括每天30分钟的游泳训练。治疗结束后，使用原子发射装置测量骨组织样本中钙、铬、铜、铁、镁、锰、铅和锌（微克/克组织）的含量：结果：结果显示，与对照组相比，所有癫痫组的骨铬含量都明显较低（p）：研究结果表明，服用维生素 E 可改善癫痫模型大鼠骨组织中钙、镁和锌的代谢。
{"title":"The Effect of Chronic Swimming Exercise and Vitamin E Supplementation on Bone Element Metabolism in Epileptic Rats.","authors":"Saltuk Buğra Baltacı, Erkut Tutkun, Mustafa Ayyıldız, Erdal Ağar, Gökhan Arslan, Rasim Moğulkoç, Abdülkerim Kasım Baltacı","doi":"10.29399/npa.28495","DOIUrl":"10.29399/npa.28495","url":null,"abstract":"<p><strong>Introduction: </strong>This study aimed to investigate the effects of chronic swimming exercise and vitamin E administration on elemental levels in the bone tissue of epileptic rats.</p><p><strong>Methods: </strong>Forty-eight rats were divided into six groups: Control, Swimming, Swimming + vitamin E, Swimming + Epilepsy, Swimming + Epilepsy + vitamin E, and Epilepsy. Vitamin E was administered to the animals chronically by gavage at a dose of 500 mg/kg every other day for 3 months. Epileptiform activity was induced with penicillin in animals 24 hours after the last vitamin E intake. The exercise program consisted of daily 30-minute swimming sessions. At the end of the treatment period, the levels of calcium, chromium, copper, iron, magnesium, manganese, lead, and zinc (µg/gram tissue) in bone tissue samples were measured using an atomic emission device.</p><p><strong>Results: </strong>The results showed that all epileptic groups had significantly lower bone chromium levels compared to the control groups (p<0.05). The epileptic, and epileptic swimming groups had the lowest levels of bone calcium, magnesium, and zinc (p<0.05). Vitamin E administration resulted in a significant increase in bone calcium, magnesium, and zinc levels in the epileptic swimming group with vitamin E compared to the epileptic and epileptic swimming groups. (p<0.05).</p><p><strong>Conclusion: </strong>The findings of the study show that the administration of vitamin E improves calcium, magnesium, and zinc metabolism in the deteriorated bone tissue of the epileptic rat model.</p>","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"37 1","pages":"113-118"},"PeriodicalIF":1.1,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11165602/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73306981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There is an ever-increasing demand for renewable, recyclable and biodegradable packaging solutions, from consumers, producers of goods, and producers of packaging materials. Closing the material loop and increasing recyclability of fiber-based package materials is one of the keys to move forward towards a more sustainable future. While the recyclability rates of fiber-based packaging are high, packaging boards with high wet-strength can pose problems due to problems with repulping. This manuscript investigated the possibilities to reduce the use of polyamide-epichlorohydrin resins (PAE) by supporting the process system with carboxy-methylated cellulose (CMC) through machine trials in mill scale production. The focus of the investigation was on the wet-strength of the board product and the repulpability value. The results given from the full-scale trial were positive, indicating a potential in using CMC while reducing the PAE addition. The results showed that wet tear strength and wet tensile strength of the board were maintained, while higher repulpability rates were given, encouraging better recyclability of the board material. This will be beneficial to the environment both with lower use of non-renewable chemicals and possibilities for higher degrees of recycling of the board products.
{"title":"Increased recyclability of wet strengthened liquid packaging board, through synergetic effects of combining CMC and PAE – A case study in full scale","authors":"Sara Christenson, Björn Sjöstrand","doi":"10.1515/npprj-2023-0034","DOIUrl":"https://doi.org/10.1515/npprj-2023-0034","url":null,"abstract":"There is an ever-increasing demand for renewable, recyclable and biodegradable packaging solutions, from consumers, producers of goods, and producers of packaging materials. Closing the material loop and increasing recyclability of fiber-based package materials is one of the keys to move forward towards a more sustainable future. While the recyclability rates of fiber-based packaging are high, packaging boards with high wet-strength can pose problems due to problems with repulping. This manuscript investigated the possibilities to reduce the use of polyamide-epichlorohydrin resins (PAE) by supporting the process system with carboxy-methylated cellulose (CMC) through machine trials in mill scale production. The focus of the investigation was on the wet-strength of the board product and the repulpability value. The results given from the full-scale trial were positive, indicating a potential in using CMC while reducing the PAE addition. The results showed that wet tear strength and wet tensile strength of the board were maintained, while higher repulpability rates were given, encouraging better recyclability of the board material. This will be beneficial to the environment both with lower use of non-renewable chemicals and possibilities for higher degrees of recycling of the board products.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"101 5","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138527506","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}
Ya Zhang, Yuxin Liu, Jizhen Huang, Kai Li, Liangliang An, Jianquan Hu, Wanruo Lei
Recycled paper has become increasingly used as a raw material in the paper industry. However, hornification limits its application. Herein, the effect of recycling on the mechanical properties and microstructure of khasi pine pulp was systematically studied. The mechanical properties deteriorated and water retention value decreased after recycling. X-ray diffraction and Fourier-transform infrared spectroscopy revealed that cellulose crystallinity increased and partial cocrystallization occurred on cellulose microfibrils. Through the analysis of the morphology of secondary fibers by FQA, the loss of fine fibers caused by each reuse was found. Using the filtration method to prepare the recycled paper reduced the loss of fine fibers and improved the mechanical properties, with the tensile strength of a sample prepared using a sand core filter unit for five cycles (8.37 MPa) being like that of a sample prepared using a paper machine after one cycle. The investigation of the internal structure of the paper showed that the retained fine fibers were bonded between the long fibers, promoting the bonding between the fibers. Fine fibers improve the curling and twisting of fibers to some extent, especially in the first three recycling cycles. The hornification phenomenon of recycled paper was studied from the viewpoint of the fiber components, which is important to promote the development and application prospect of recycled paper.
{"title":"Effect of fine fibers on secondary fibers and recycled paper","authors":"Ya Zhang, Yuxin Liu, Jizhen Huang, Kai Li, Liangliang An, Jianquan Hu, Wanruo Lei","doi":"10.1515/npprj-2023-0062","DOIUrl":"https://doi.org/10.1515/npprj-2023-0062","url":null,"abstract":"Recycled paper has become increasingly used as a raw material in the paper industry. However, hornification limits its application. Herein, the effect of recycling on the mechanical properties and microstructure of khasi pine pulp was systematically studied. The mechanical properties deteriorated and water retention value decreased after recycling. X-ray diffraction and Fourier-transform infrared spectroscopy revealed that cellulose crystallinity increased and partial cocrystallization occurred on cellulose microfibrils. Through the analysis of the morphology of secondary fibers by FQA, the loss of fine fibers caused by each reuse was found. Using the filtration method to prepare the recycled paper reduced the loss of fine fibers and improved the mechanical properties, with the tensile strength of a sample prepared using a sand core filter unit for five cycles (8.37 MPa) being like that of a sample prepared using a paper machine after one cycle. The investigation of the internal structure of the paper showed that the retained fine fibers were bonded between the long fibers, promoting the bonding between the fibers. Fine fibers improve the curling and twisting of fibers to some extent, especially in the first three recycling cycles. The hornification phenomenon of recycled paper was studied from the viewpoint of the fiber components, which is important to promote the development and application prospect of recycled paper.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"37 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138527502","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}
Water plays an important role in the properties of cellulose. In materials design, the water uptake of cellulose has been traditionally seen as a drawback, since water reduces mechanical resistance of paper and cardboard, and at high hydration, cellulose-based products are disintegrated. However, recently, the hydration of cellulose has been considered as an advantage to design water-responsive soft actuators. In Nature, water is the fuel for several plant functions that involve motion, such as the seed release or the plant protection from high temperature and radiation. Inspired by these natural systems, cellulose-based actuators have been designed to display different movements (bending, twisting, curling) in response to water. Biopolymer structuration inducing anisotropy within the system allows the asymmetric expansion of layers, which results in macroscopic movement. This review gives an overview of the soft actuators triggered by the hydration/dehydration processes of cellulose. We present representative examples of water-triggered natural actuators, which have inspired researchers to design anisotropic cellulose-based materials that develop controlled movement in response to water.
{"title":"Water uptake as a fuel for soft actuators from cellulose","authors":"Lisa Lopes da Costa, Ana Villares","doi":"10.1515/npprj-2023-0037","DOIUrl":"https://doi.org/10.1515/npprj-2023-0037","url":null,"abstract":"Water plays an important role in the properties of cellulose. In materials design, the water uptake of cellulose has been traditionally seen as a drawback, since water reduces mechanical resistance of paper and cardboard, and at high hydration, cellulose-based products are disintegrated. However, recently, the hydration of cellulose has been considered as an advantage to design water-responsive soft actuators. In Nature, water is the fuel for several plant functions that involve motion, such as the seed release or the plant protection from high temperature and radiation. Inspired by these natural systems, cellulose-based actuators have been designed to display different movements (bending, twisting, curling) in response to water. Biopolymer structuration inducing anisotropy within the system allows the asymmetric expansion of layers, which results in macroscopic movement. This review gives an overview of the soft actuators triggered by the hydration/dehydration processes of cellulose. We present representative examples of water-triggered natural actuators, which have inspired researchers to design anisotropic cellulose-based materials that develop controlled movement in response to water.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"38 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138527501","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}
Katarzyna Mystek, Bo Andreasson, Michael S. Reid, Hugo Françon, Cecilia Fager, Per A. Larsson, Anna J. Svagan, Lars Wågberg
Abstract This work describes an emulsification-solvent-evaporation method for the preparation of liquid-filled capsules made from cellulose acetate. Two different emulsification techniques were applied: bulk emulsification by high-shear mixing, and droplet generation using microfluidics. The bulk emulsification method resulted in the formation of oil-in-water emulsions composed of an organic mixture of isooctane and cellulose acetate in methyl acetate, and an aqueous phase of high-molecular-weight polyvinyl alcohol (PVA). Upon the solvent evaporation, the emulsion droplets evolved into isooctane-filled cellulose acetate capsules. In contrast, microfluidics led to the formation of monodisperse droplets composed of the aqueous PVA solution dispersed in the organic phase. Upon the solvent evaporation, the emulsion droplets evolved into water-filled cellulose acetate capsules. Owing to the thermoplastic properties of the cellulose acetate, the capsules formed with the bulk mixing demonstrated a significant expansion when exposed to an increased temperature. Such expanded capsules hold great promise as building blocks in lightweight materials.
{"title":"The preparation of cellulose acetate capsules using emulsification techniques: high-shear bulk mixing and microfluidics","authors":"Katarzyna Mystek, Bo Andreasson, Michael S. Reid, Hugo Françon, Cecilia Fager, Per A. Larsson, Anna J. Svagan, Lars Wågberg","doi":"10.1515/npprj-2023-0051","DOIUrl":"https://doi.org/10.1515/npprj-2023-0051","url":null,"abstract":"Abstract This work describes an emulsification-solvent-evaporation method for the preparation of liquid-filled capsules made from cellulose acetate. Two different emulsification techniques were applied: bulk emulsification by high-shear mixing, and droplet generation using microfluidics. The bulk emulsification method resulted in the formation of oil-in-water emulsions composed of an organic mixture of isooctane and cellulose acetate in methyl acetate, and an aqueous phase of high-molecular-weight polyvinyl alcohol (PVA). Upon the solvent evaporation, the emulsion droplets evolved into isooctane-filled cellulose acetate capsules. In contrast, microfluidics led to the formation of monodisperse droplets composed of the aqueous PVA solution dispersed in the organic phase. Upon the solvent evaporation, the emulsion droplets evolved into water-filled cellulose acetate capsules. Owing to the thermoplastic properties of the cellulose acetate, the capsules formed with the bulk mixing demonstrated a significant expansion when exposed to an increased temperature. Such expanded capsules hold great promise as building blocks in lightweight materials.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"7 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136229435","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}
Abstract This article describes the study of the effects of carbon nanoparticles on fibrous cellulosic webs. The handsheets were coated with coating colours containing graphene oxide (GO), carbon nanotube (CNT) and super conductive black carbon (SCBC) nanoparticles at different concentrations. The Raman method was used to assess the quality of the carbon materials and the changes in the band gap of the nanoparticles deposited on the handsheets. The influence of the type and content of the nanoparticles on the structural, mechanical, chemical and electrical properties of the composites was investigated and discussed. It was found that the range of failure modes and fracture surfaces seen in the SEM image is due to the influence of the different carbon materials as the main source of coating colour. The experimental percolation threshold curve and the total surface electrical resistivity of the samples were investigated. The SCBC coated samples exhibited low percolation threshold and comparatively high electrical conductivity at a certain maximum concentration. Each composite exhibited a pronounced stress distribution along the surface layer and the nanoparticle distribution was uniform. The surface resistance of the coated handsheets declined by about 14.103 times with the addition of only 1.0 wt% SCBC compared to the control sample. The composites coated with GO and SCBC nanoparticles at a concentration of 1.0 wt% had the highest tensile strength values.
{"title":"The effect of carbon nanoparticles on cellulosic handsheets","authors":"Merve Engin, Nusret Kaya","doi":"10.1515/npprj-2023-0042","DOIUrl":"https://doi.org/10.1515/npprj-2023-0042","url":null,"abstract":"Abstract This article describes the study of the effects of carbon nanoparticles on fibrous cellulosic webs. The handsheets were coated with coating colours containing graphene oxide (GO), carbon nanotube (CNT) and super conductive black carbon (SCBC) nanoparticles at different concentrations. The Raman method was used to assess the quality of the carbon materials and the changes in the band gap of the nanoparticles deposited on the handsheets. The influence of the type and content of the nanoparticles on the structural, mechanical, chemical and electrical properties of the composites was investigated and discussed. It was found that the range of failure modes and fracture surfaces seen in the SEM image is due to the influence of the different carbon materials as the main source of coating colour. The experimental percolation threshold curve and the total surface electrical resistivity of the samples were investigated. The SCBC coated samples exhibited low percolation threshold and comparatively high electrical conductivity at a certain maximum concentration. Each composite exhibited a pronounced stress distribution along the surface layer and the nanoparticle distribution was uniform. The surface resistance of the coated handsheets declined by about 14.103 times with the addition of only 1.0 wt% SCBC compared to the control sample. The composites coated with GO and SCBC nanoparticles at a concentration of 1.0 wt% had the highest tensile strength values.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":" 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135192005","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}
Abstract This paper prepared the composite aerogel by adding graphene oxide (GO) and polypyrrole (PPy) to the cellulose nanofiber suspension. Then GO was reduced to RGO (reduced graphene oxide) with reducing agent, and CNFs/RGO/PPy composite aerogel with excellent conductivity was prepared. Scanning electron microscope (SEM) was adopted to analyze the structure and morphology of CNFs/RGO/PPy aerogel. Cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) were employed to analyze its electrochemical properties. The results showed that the best structure and electrochemical effect could be obtained when the ratio of CNFs/RGO/PPy was 6:2:3. At the current density of 0.25 mA cm −2 , CNFs/RGO/PPy composite aerogel had higher electrochemical performance, and the specific capacitance was 330 F g −1 . As an energy storage material, the composite has excellent potential in electrode materials.
摘要在纤维素纳米纤维悬浮液中加入氧化石墨烯(GO)和聚吡咯(PPy)制备复合气凝胶。然后用还原剂将氧化石墨烯还原为RGO(还原性氧化石墨烯)，制备出导电性能优异的CNFs/RGO/PPy复合气凝胶。采用扫描电镜(SEM)对CNFs/RGO/PPy气凝胶的结构和形貌进行了分析。采用循环伏安法(CV)、恒流充放电法(GCD)和电化学阻抗谱法(EIS)对其电化学性能进行了分析。结果表明，当CNFs/RGO/PPy的比例为6:2:3时，可获得最佳的结构和电化学效果。在0.25 mA cm−2的电流密度下，CNFs/RGO/PPy复合气凝胶具有较高的电化学性能，比电容为330 F g−1。作为一种储能材料，该复合材料在电极材料中具有优异的潜力。
{"title":"Nanofibers/reduced graphene oxide/polypyrrole for High-performance electrode material","authors":"Yunhao Luan, Lingyun Jia, Wenli Liu, Pengtao Liu","doi":"10.1515/npprj-2023-0029","DOIUrl":"https://doi.org/10.1515/npprj-2023-0029","url":null,"abstract":"Abstract This paper prepared the composite aerogel by adding graphene oxide (GO) and polypyrrole (PPy) to the cellulose nanofiber suspension. Then GO was reduced to RGO (reduced graphene oxide) with reducing agent, and CNFs/RGO/PPy composite aerogel with excellent conductivity was prepared. Scanning electron microscope (SEM) was adopted to analyze the structure and morphology of CNFs/RGO/PPy aerogel. Cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) were employed to analyze its electrochemical properties. The results showed that the best structure and electrochemical effect could be obtained when the ratio of CNFs/RGO/PPy was 6:2:3. At the current density of 0.25 mA cm −2 , CNFs/RGO/PPy composite aerogel had higher electrochemical performance, and the specific capacitance was 330 F g −1 . As an energy storage material, the composite has excellent potential in electrode materials.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":" 56","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340321","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}
Abstract An initial carbon emission calculation formula for the pulp molding industry was first proposed in accordance with the calculation guidelines provided by the Intergovernmental Panel on Climate Change (IPCC). The formula was primarily developed by utilizing the greenhouse gas accounting methods used in the pulp and paper industry and the life cycle assessment (LCA) theory. Carbon dioxide emissions coming into being during the production processes of dry-press and wet-press pulp molding were calculated individually, alongside the carbon emission factors throughout the lifecycle of the products. This study also delivers a comparative analysis of pulp molding products and similar cushion packaging materials. Moreover, the findings reveal that during the production phase, particularly in the formative stages of pulp molding, substantial carbon dioxide emissions would be produced, with dry-press pulp molding products exhibiting markedly higher carbon emission factors than their wet-press counterparts. The primary objective of achieving low-carbon transformation for the pulp molding industry was to reduce the carbon emissions caused by the forming process, primarily by improving the forming process and enhancing energy efficiency or utilizing clean energy.
{"title":"Carbon emissions analysis of the pulp molding industry: a comparison of dry-press and wet-press production processes","authors":"Zhisheng Lv, Shaohong Jiang, Lingjun Wei, Hao Sun, Yuhui Liu, Jieyu Cui, Wanlu Zhang","doi":"10.1515/npprj-2023-0032","DOIUrl":"https://doi.org/10.1515/npprj-2023-0032","url":null,"abstract":"Abstract An initial carbon emission calculation formula for the pulp molding industry was first proposed in accordance with the calculation guidelines provided by the Intergovernmental Panel on Climate Change (IPCC). The formula was primarily developed by utilizing the greenhouse gas accounting methods used in the pulp and paper industry and the life cycle assessment (LCA) theory. Carbon dioxide emissions coming into being during the production processes of dry-press and wet-press pulp molding were calculated individually, alongside the carbon emission factors throughout the lifecycle of the products. This study also delivers a comparative analysis of pulp molding products and similar cushion packaging materials. Moreover, the findings reveal that during the production phase, particularly in the formative stages of pulp molding, substantial carbon dioxide emissions would be produced, with dry-press pulp molding products exhibiting markedly higher carbon emission factors than their wet-press counterparts. The primary objective of achieving low-carbon transformation for the pulp molding industry was to reduce the carbon emissions caused by the forming process, primarily by improving the forming process and enhancing energy efficiency or utilizing clean energy.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135585468","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}
Abstract Sustainable coatings exhibit potential in enhancing oil resistance of packaging paper. Alkyl ketone dimer (AKD) was used to esterify sodium alginate (SA) to prepare water and oil resistant agent SAD. As SAD was coated on paper, it reduced the surface energy and blocked the fiber pores of paper, thus improving the barrier performance of paper. The oil resistance grade can reach grade 6 at coating amount of 2.13 ± 0.26 g/m 2 , which is qualified for food packaging. The coated paper also showed good barrier to hot castor oil. Resistance to organic solvent and water were also enhanced with initial water contact angle (WCA) increased to 69.2°. Compared with base paper, SAD coated paper had better mechanical properties and more importantly, coated paper can be effectively recycled to achieve green recycling.
{"title":"Recyclable oil resistant paper with enhanced water resistance based on alkyl ketene dimer modified sodium alginate","authors":"Liyan Ma, Shuai Liu, Jiahui Shi, Rina Wu, Peng Lu","doi":"10.1515/npprj-2023-0047","DOIUrl":"https://doi.org/10.1515/npprj-2023-0047","url":null,"abstract":"Abstract Sustainable coatings exhibit potential in enhancing oil resistance of packaging paper. Alkyl ketone dimer (AKD) was used to esterify sodium alginate (SA) to prepare water and oil resistant agent SAD. As SAD was coated on paper, it reduced the surface energy and blocked the fiber pores of paper, thus improving the barrier performance of paper. The oil resistance grade can reach grade 6 at coating amount of 2.13 ± 0.26 g/m 2 , which is qualified for food packaging. The coated paper also showed good barrier to hot castor oil. Resistance to organic solvent and water were also enhanced with initial water contact angle (WCA) increased to 69.2°. Compared with base paper, SAD coated paper had better mechanical properties and more importantly, coated paper can be effectively recycled to achieve green recycling.","PeriodicalId":19315,"journal":{"name":"Nordic Pulp & Paper Research Journal","volume":"3 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136381865","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}
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