检索结果-内蒙古大学图书馆

Effects of production variables of fines-PCC composite fillers on paper properties (II): Added amounts and type of fines

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2019年第6期51卷 167-174页

作者： Kang, Hyun Won, Jong Myoung Cho, Byoung-Uk Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chunchon24341 Korea Republic of

A composite filler was developed by pre-flocculation of hardwood bleached kraft pulp (HwBKP) fines and precipitated calcium carbonate (PCC) with flocculants such as cationic polyacrylamide (C-PAM) and bentonite. Effects of addition ratios and type of fines during production of the composite fillers on the mechanical and the optical properties of handsheets were investigated. Increasing fines addition ratios improved strength properties of handsheets both in the composite fillers and in the conventional loading. The composite filler with softwood bleached kraft pulp (SwBKP) fines resulted in superior strength properties than that with HwBKP fines and with the mixture of HwBKP fines and SwBKP fines. The composite filler and the conventional loading showed similar levels of brightness and opacity at a given addition ratio of fines. In addition, distinct effects of type of fines on brightness and opacity of handsheets with the composite fillers were not found. © 2019 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Flocculation

来源：评论

学校读者我要写书评

暂无评论

Binary data transmission performance of sub-20 nm indium antimonide nanowires

Binary data transmission performance of sub-20 nm indium ant...

引用

2011 MRS Spring Meeting

作者： Guvenc, Ali Bilge Penchev, Miroslav Zhong, Jiebin Ozkan, Cengiz Ozkan, Mihrimah Department of Electrical Engineering University of California-Riverside Riverside CA 92521 United States Department of Mechanical Engineering University of California-Riverside Riverside CA 92521 United States Material Science and Engineering Program University of California-Riverside Riverside CA 92521 United States

ISBN: (纸本)9781618395535

We investigated the data transmission performance of indium antimonide (InSb) nanowires (NWs) synthesized on InSb (100) substrate using chemical vapor deposition (CVD) having diameters of 20 nm and below. The results indicate that the data transmission performance of NWs suffer from low mobility values on the order of 10-to-15 cm2V-1s-1 because of the scattering due to their small diameters, crystal defects and oxidation occurs during growth and cooling. The 20 nm NWs can sustain data rates up to 5 mega bits per second (Mbps) without any impedance matching and de-embedding of the parasitic parameters coming from the measurement system with a bit error rate (BER) level of 10-8. The data rate is directly proportional to the diameter of the NWs. © 2011 materials Research Society.

关键词： Nanowires

来源：评论

学校读者我要写书评

暂无评论

Data transmission performance of few-layer graphene ribbons

Data transmission performance of few-layer graphene ribbons

引用

2011 MRS Spring Meeting

作者： Guvenc, Ali Bilge Lin, Jian Penchev, Miroslav Ozkan, Cengiz Ozkan, Mihrimah Department of Electrical Engineering University of California-Riverside Riverside CA 92521 United States Department of Mechanical Engineering University of California-Riverside Riverside CA 92521 United States Material Science and Engineering Program University of California-Riverside Riverside CA 92521 United States

ISBN: (纸本)9781605113210

We investigated the electrical characteristics and digital data transmission performance few-layer graphene ribbons grown by chemical vapor deposition. Graphene ribbons having a mobility of 2,180 cm2V -1s-1 can sustain data rates up to 50 megabits per second at 1.5 μm length, thus the bandwidth is inversely proportional to resistance caused by defects in the graphene layers. Improving the graphene mobility to highest measured values (∼200,000 cm2V-1s -1) and using structures with multiple coplanar transmission lines in parallel could carry the bandwidth beyond the gigabits per second level. © 2011 materials Research Society.

关键词： Bandwidth

来源：评论

学校读者我要写书评

暂无评论

Fibrillation characteristics of KOCC and its effect on the physical properties of linerboard

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第5期50卷 93-99页

作者： Han, Jun Kyu Hwang, Im Jeong Kim, Jin Mo Choi, Jae Jun Lee, Yong Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

Fibrillation was attempted to determine the suitability of KOCC for the production of nanocellulose in order to utilize it as a high value added material, and the possibility of using fibrillated KOCC obtained therefrom as a papermaking additive was evaluated. A grinder was used for the fibrillation of KOCC. In order to investigate the fibrillation characteristics of KOCC, the changes of SEM images, Brookfield viscosity and degree of polymerization were measured. Also, the handsheets were prepared and the changes of major physical properties were investigated in order to evaluate the performance and applicability of fibrillated KOCC as an additive for linerboard manufacture. The fibrillation of KOCC was significantly delayed compared to the bleached chemical pulp, and the complete fibrillation was not achieved, probably due to the residual lignin content (kappa no. 19.36). It is difficult to produce nanocellulose without proper pretreatment. The average fiber length decreased to the level of fines at 20 times of grinding because KOCC was severely aged. As the fibrillation of KOCC proceeded, the degree of Brookfield viscosity continued to increase and the degree of polymerization showed a gradual decrease. Bulk, tear index, and burst index of paper were not significantly affected by the addition of fibrillated KOCC. However, it was found that the tensile index and stiffness could be improved by the combination of retention aid and fibrillated KOCC. © 2018 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Additives

来源：评论

学校读者我要写书评

暂无评论

Influence of KOCC swelling by soaking after beating on pulp and paper properties

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 110-115页

作者： Kim, Jin Mo Hwang, Im Jeong Han, Jun Kyu Lee, Yong Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

KOCC is used as a very important raw material in industrial paper manufacturing in Korea. However, as KOCC is repeatedly used as a raw material, the aging and hornification of the pulp becomes more severe, making it difficult to produce industrial paper of excellent strength. In order to solve these problems, various methods such as addition of virgin pulp, enzyme treatment, mechanical treatment and polymer additive have been applied. This study was carried out to evaluate the applicability of swelling treatment by soaking after beating in order to improve the quality of KOCC by environmentally friendly method. As a result of this study, the WRV of KOCC and UKP increased with increasing soaking time, while the freeness tended to decrease. The air permeability of KOCC handsheet showed a tendency to decrease by swelling due to soaking, but the opacity and bulk did not show any significant changes. The tensile index was slightly improved by soaking, but no significant changes were observed in the tear index and Taber stiffness. Considering the above results, although swelling due to soaking helps somewhat to improve some physical properties, it is difficult to expect the significant improvement of physical properties of paper only by a single swelling treatment. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Air permeability

来源：评论

学校读者我要写书评

暂无评论

Energy-saving potential of GCC addition in linerboard manufacturing

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2019年第2期51卷 68-75页

作者： Han, Jun Kyou Lee, Yong-Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

The feasibility of energy consumption reduction in the linerboard manufacturing process while maintaining the major properties of the product by increasing its ash content was investigated. For this purpose, ground calcium carbonate (GCC 75F) and GCC composite with microfibrillated cellulose (MFC) were chosen as inorganic fillers. The solid content was measured after wet pressing and drying to evaluate the effect of their addition and the change in the physical properties of linerboard with the ash content was also studied. As the ash content increased, the solid content also increased after wet pressing, with no significant difference between using GCC and GCC composite;however, after drying, the solid content was significantly increased at the initial drying stage by the ash content increase, and a solid content obtained was somewhat higher when the GCC composite was added. The bulk of linerboard was slightly reduced as the ash content increased, but there was no significant difference between GCC and GCC composite. The air resistance decreased slightly when the ash content was increased by the addition of GCC. However, when using GCC composites as fillers, the air resistance was increased slightly. The strain change was not significant even though the ash content was increased by 10% and there was no significant difference between GCC and GCC composite. However, the tensile index, the tensile energy absorption, the tear index, the burst index, and the Taber stiffness decreased with increasing the ash content and the strength obtained by using the GCC composite was higher than that by GCC. © 2019 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Physical properties

来源：评论

学校读者我要写书评

暂无评论

DC/AC performance analysis of indium antimonide nanowires

DC/AC performance analysis of indium antimonide nanowires

引用

2011 MRS Spring Meeting

ISBN: (纸本)9781618395320

We investigated the electrical properties and transmission line performance of indium antimonide nanowires. The results indicate that the of nanowires suffer from low mobility values on the order of 10-to-15 cm2V -1s-1 because of the contact resistances, scattering due to their small diameters, crystal defects and oxidation occurs during growth and cooling. nanowires show extremely inductive behavior during the AC measurements and due to these parasitic parameters, they can sustain transmission for the signals having frequencies up to 10 MHz. The bandwidth of the nanowires is directly proportional to the diameter of the nanowires. Improving the mobility to higher values and introducing de-embedding and impedance matching to the measurements and analysis could easily carry the bandwidth beyond GHz levels. © 2011 materials Research Society.

关键词： Nanowires

来源：评论

学校读者我要写书评

暂无评论

Effect of alkaline pre-treatment on the production characteristics of nanofibrillated cellulose from white ledger

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2017年第5期49卷 86-96页

作者： Hwang, Lm Jeong Kim, Jin Mo Lee, Yong Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

To evaluate the feasibility of NFC production using white ledger as a raw material, deinking and ash removal were carried out and fibrillation was performed with a grinder. In order to compare the fibrillation characteristics of white ledger, the fibrillation of HwBKP and SwBKP was performed in the same manner. Especially, white ledger is expected to be difficult to fibrillate by hornification phenomenon, so it is pretreated with 0.5, 1, 3 and 5% alkali solutions and then fibrillated. White ledger was found to be harder to fibrillate than HwBKP and SwBKP, and when pretreated with a low concentration alkali solution of up to 5%, fibrillation was remarkably improved. FTIR analysis showed no change in absorption band due to fibrillation and alkali pretreatment, and no apparent change in crystallinity and hydrogen bond index was observed. The CED polymerization degree of NFCs decreased with the progress of fibrillation, but the effect of alkali pretreatment was not clear. The average fiber length of NFC was decreased by fibrillation. In the case of HwBKP and SwBKP, the alkaline pretreatment effect on the average fiber length change was not clear. However, in the case of white ledger, the average fiber length was significantly decreased in the early stage of fibrillation and the difference from the untreated case was decreased as the fibrillation progressed. The relative specific energy consumptions in producing NFC at The relative specific energy consumptions in producing NFC at the same fibrillation level were 17.8 Wh/g for HwBKP, 25.1 Wh/g for SwBKP, and 37.4 Wh/g for white ledger, respectively. The specific energy consumption of the white ledger was reduced to 18.1 Wh/g when it is pretreated with 3-5% alkali solution.

关键词： Cellulose

来源：评论

学校读者我要写书评

暂无评论

Effect of light intensity on Schottky barrier widths and I-V characteristics of polymer heterojunction photodiodes

引用

2011 MRS Spring Meeting

作者： Guvenc, Ali Bilge Ozkan, Cengiz Ozkan, Mihrimah Department of Electrical Engineering University of California Riverside Riverside CA 92521 United States Department of Mechanical Engineering University of California Riverside Riverside CA 92521 United States Material Science and Engineering Program University of California Riverside Riverside CA 92521 United States

ISBN: (纸本)9781605113364

The Schottky barriers that forms on the interface between aluminum and organic semiconductor of polymer heterojunction photodiodes based on poly(3-hexylthiophene): [6,6]-phenyl-C16-butyric acid methylester blend, has been investigated according to Mott-Schottky curves. We focused on the effect of light intensity on the Schottky barrier widths and I-V characteristics of the devices. Comparison of the mathematical models and experimental data measured under different light intensities indicate a dependency of Schottky barrier to the light intensity. © 2011 materials Research Society.

关键词： Butyric acid

来源：评论

学校读者我要写书评

暂无评论

Improvement of paper properties using white ledger CNF

引用

Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2018年第4期50卷 71-76页

作者： Hwang, Im-Jeong Kim, Jin-Mo Lee, Yong-Kyu Won, Jong Myoung Program of Paper Science and Engineering Division of Forest Material Science and Engineering College of Forest and Environmental Sciences Kangwon National University Chuncheon24341 Korea Republic of

The effects of white ledger CNF addition on the drainage characteristics and paper properties were investigated in order to evaluate the possibility of white ledger CNF as a papermaking additive for improving paper properties. The white ledger CNF addition showed a tendency to delay the dewatering on the paper machine wire and did not show any difference from the HwBKP CNF. As a result of FAP (Final Air Permeability) measurement to predict the dewatering characteristic at the press part, the FAP value tended to be slightly increased by the addition of CNF, but the difference was not so large enough that the dewatering at press part would not be significantly deteriorated. The bulk was slightly decreased as white ledger CNF was added, but there was no difference according to the kind of raw materials used for CNF production. The air resistance was increased with the increase of white ledger CNF addition. The opacity of handsheet did not show a significant change even though white ledger CNF was added up to 2%. Tensile index, tear index and Taber stiffness of handsheet were all improved by white ledger CNF addition. Especially, tensile index was improved significantly by the addition of white ledger CNF addition. It was also confirmed that alkaline pretreatment of white ledger before grinding is not necessary when it is used as a papermaking additive. © 2015 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Additives

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：