检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Youn, Seonyoung Mathur, Kavita Mills, Amanda C. Fiber and Polymer Science Ph.D. candidate North Carolina State University RaleighNC27606 United States Department of Textile and Apparel Technology and Management North Carolina State University RaleighNC27606 United States Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC27606 United States

The integration of wearable biosignal monitoring systems into daily healthcare has marked a significant advancement in medical care. Yet, the design of these devices often neglects the anatomical specificity of individual bodies, compromising both functionality and comfort. This oversight is particularly pronounced in research on the effective placement of 3-lead electrodes, selecting suitable materials, and customizing fit for women's diverse body shapes. To address this gap, this research introduces a novel design methodology for the development of advanced wearable health-monitoring garments, focusing on smart sports bras as a case study. This approach emphasizes contact pressure (CP) optimization for electrode placement, material selection, and sizing to enhance biosignal acquisition and comfort for the wearer. The study identifies optimal horizontal 3-lead electrode placements and configurations, the most effective across three female participants with diverse body mass indices (BMIs). Furthermore, the research employs a simulation-based contact pressure model (CP model) to precisely engineer desired pressure levels through strategic material selection and sizing adjustments. Guided by the CP model, screen-printed silver/silver chloride electrodes are incorporated into single jersey knit fabric, adjusted by a 20% pattern size reduction for a tailored electrocardiogram (ECG) chest band in the optimized configuration. This achieves a signal-to-noise ratio of 40.9, closely comparable to the 41.9 ratio obtained with traditional wet electrodes, while also exhibiting a higher QRS amplitude above 0.84mV, benchmarked against 12-lead electrodes for reliability. The study further identifies an optimal contact pressure range of 0.56-1.24 kPa for ECG chest bands and a subjective pressure tolerance range of 0.93 to 1.8 kPa in the chest area across female subjects. Finally, the smart sports bra integration demonstrates clear QRS complexes and high biopotential amplitude, whi

关键词： Electrocardiograms

来源：评论

学校读者我要写书评

暂无评论

Development of Epoxy/BN Composites with High Thermal Conductivity for Metal-Core Printed Circuit Board(MCPCB)

Development of Epoxy/BN Composites with High Thermal Conduct...

引用

2015 International Conference on Intelligent Materials and Manufacturing engineering (IMME 2015)

作者： Jae Hyun Choi Bong Goo Choi Min A Lee Jae-Sik Na Laboratory of Fiber Application and Manufacturing Department of Fiber and Composite MaterialsFeng Chia University School of Chinese Medicine “China Medical University” Department of Fashion Design Asia University Department of Ph.D Program in Civil and Hydraulic Engineering Feng Chia University Department of Land Management Feng Chia University The Department of Textile Engineering “Chinese Culture University” Institute of Biomedical Engineering and Materials Science “Central Taiwan University of Science and Technology”

The epoxy composites with high thermal conductivity for metal-core printed circuit board(MCPCB) can be prepared by varnish coating and a hot press method. Alumina filler of plate-like shape was used as primary micro-filler, while plate-like alumina filler, h-BN, a-BN and s-BN filler were used for blending into the plate-like alumina filler as the secondary filler. Results showed that the secondary fillers a-BN and s-BN loaded epoxy composites have higher thermal conductivity than alumina filler single-loaded composites. Also, BN filler has high thermal conductivity, but h-BN filled epoxy composite has lower thermal conductivity than alumina filled epoxy composite. The decrease of voids in epoxy composite are very important, and the filler shape and surface modification is also necessary to achieve high thermal conductivity in epoxy composite for MCPCB

关键词： MCPCB Epoxy composite Boron nitride Thermal conductivity Thermal diffusivity

来源：评论

学校读者我要写书评

暂无评论

Physical Properties of Geotextiles Reinforced by Recycled Kevlar Selvages

Physical Properties of Geotextiles Reinforced by Recycled Ke...

引用

2015 International Conference on Intelligent Materials and Manufacturing engineering (IMME 2015)

作者： Hee Jung Moon Bong Soo Lee Seung Hyun Cho Laboratory of Fiber Application and Manufacturing Department of Fiber and Composite MaterialsFeng Chia University School of Chinese Medicine "China Medical University" Department of Fashion Design Asia University Department of Ph.D Program in Civil and Hydraulic Engineering Feng Chia University Department of Land Management Feng Chia University The Department of Textile Engineering "Chinese Culture University" Institute of Biomedical Engineering and Materials Science "Central Taiwan University of Science and Technology"

Kevlar fiber are artifical fibers that have been globally commonly used due to their attributes of a high modulus, a low elongation, an impact resistance, a chemical resistance, and thermostability. Therefore, this study proposes nonwoven geotextiles by corporating with recycled Kevlar unidirectoinal selvage with a low production cost, crimped polyester(PET) fibers, and low-melting-point PET(LPET) fibers. The content of LPET fiber is specified as 20 wt%, while the content of Kevlar fiber varies as 0 wt%, 5 wt%, 10 wt%, 15 wt%, and 20 wt%. The optimal tear strength of 195 N occurs with a content of Kevlar fiber being 20 wt%.

关键词： Recycled Kevlar fiber Low-melting-point polyester(PET) fiber Nonwoven Geotextile

来源：评论

学校读者我要写书评

暂无评论

Effect of comonomers on the melt intercalation of styrenics/organosilicate hybrids

American Chemical Society, Polymer Preprints, Division of Po...

引用

American Chemical Society, polymer Preprints, Division of polymer Chemistry 2000年第1期41卷 598-599页

作者： Jo, Won Ho Yoon, Jong Tae Lee, Moo Sung Ko, Moon Bae Hyperstructured Organ. Mat. Res. C. Dept. of Fiber and Polymer Science Seoul National University Seoul 151-742 Korea Republic of Department of Textile Engineering Adv. Materials Research Institute Chonnam National University Kwangju 500-757 Korea Republic of Polymer Hybrid Research Center Korea Inst. of Sci. and Technology Seoul 130-650 Korea Republic of

The effect of comonomers on the intercalation behavior of the styrenics/organosilicate hybrids was investigated because they can change the degree of intermolecular interaction and the stress-transfer during mixing. Two different polar comonomers, acrylonitrile (AN) and methylvinyloxazoline (OZ), were incorporated into non-polar polystyrene (PS) chains. The degree of intercalation was estimated using an X-ray diffraction technique and the interaction between polymer and montmorillonite was investigated using a Fourier transform infrared spectroscopy.

关键词： Reinforced plastics

来源：评论

学校读者我要写书评

暂无评论

The elastic fracture of polycondensates

引用

Journal of polymer science Part C: polymer Letters 1980年第2期18卷

作者： Edwin Boudreaux Jr. John A. Cuculo Fiber and Polymer Science Program Department of Textile Chemistry North Carolina State University Raleigh North Carolina 27650

来源：评论

学校读者我要写书评

暂无评论

Bistable polymer Actuators: Bioinspired Electrically Activated Soft Bistable Actuators (Adv. Funct. Mater. 35/2018)

引用

Advanced Functional Materials 2018年第35期28卷

作者： Huiqi Shao Shuzhen Wei Xin Jiang Douglas P. Holmes Tushar K. Ghosh Department of Textile Engineering Chemistry and Science Fiber & Polymer Science Program North Carolina State University Raleigh NC 27695 USA Department of Mechanical Engineering Boston University Boston MA 02215 USA

来源：评论

学校读者我要写书评

暂无评论

Photo-Induced Self-Reduction Enabling Ultralow Threshold Voltage Energy-Conservation Electrochromism

SSRN

引用

SSRN 2022年

作者： Bai, Zhiyuan Li, Ran Ping, Lu Fan, Qingchao Lu, Ziqiu Hou, Chengyi Zhang, Qinghong Li, Yaogang Li, Kerui Ling, Xi Wang, Hongzhi State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Department of Chemistry Boston University 590 Commonwealth Avenue BostonMA02215 United States Key Laboratory of Smart Fiber Technology and Products China Textile Industry Association Shanghai201620 China

Electrochromic (EC) devices are highly desired for fields like smart windows, sensing, and display because of their great light modulation ability. However, the high driving voltage of the EC device usually leads to the decomposition of internal electrolyte, degradation of cyclability and higher energy consumption. In this work, based on the finding of the photo-induced self-reduction and coloration of light illuminated viologen/TiO 2 gels (VTGs), we develop VTG-based devices which show remarkable EC performance under an ultralow voltage (~0.1 V). The working energy consumption of a VTG device is at least one order of magnitude lower than those of reported EC devices and other display technologies, giving rise to the larger area/scale optical modulation. Furthermore, through the construction of RGB array displays, large-area EC devices, and flexible EC devices, the universal applicability and multifield potential applications of VTGs were demonstrated. © 2022, The Authors. All rights reserved.

关键词： Electrochromism

来源：评论

学校读者我要写书评

暂无评论

Pore structure analysis of swollen dextran-methacrylate hydrogels by SEM and mercury intrusion porosimetry

引用

Journal of Biomedical Materials Research Part B: Applied Biomaterials 2002年第3期53卷

作者： Sin–hee Kim Chih–Chang Chu Fiber and Polymer Science Program Department of Textiles & Apparel and Biomedical Engineering Program Cornell University Ithaca NY 14853

The objectives of this study were to visually examine the surface and interior morphology of a new class of biodegradable hydrogels based on dextran-methacrylate and to quantify the porous structure of these hydrogels in swollen state. Two techniques (scanning electron microscopy and mercury intrusion porosimetry) were used to analyze pore structure of dextran-methacrylate hydrogels as a function of the degree of methacrylate substitution. SEM was used to observe 3-dimensional network structure of cryofixed and fractured swollen dextran-methacrylate hydrogels. Image analysis of the SEM data revealed different pore shapes and sizes, depending on the degree of substitution and the location within the hydrogel. A higher methacrylate-substituted dextran hydrogel showed a compact and rigid pore structure, while a lower substituted hydrogel showed a delicate and fragile pore structure. Mercury intrusion porosimetry analysis of the pore structure of dextran-methacrylate hydrogels provided useful and more reliable quantitative data of pore characteristics, such as total pore area, average pore diameter, their distribution, and bulk density. The total pore area and average pore diameter of swollen dextran-methacrylate hydrogels decreased with an increase in degree of methacrylate substitution, while bulk density increased with an increase in degree of substitution. © 2000 John Wiley & Sons, Inc. J Biomed Mater Res (Appl Biomater) 53: 258–266, 2000

关键词： dextran-methacrylate hydrogel pore structure scanning electron microscopy mercury intrusion porosimetry morphology image analysis

来源：评论

学校读者我要写书评

暂无评论

Biodegradable dextran-polylactide hydrogel network and its controlled release of albumin

引用

Journal of Biomedical Materials Research Part B: Applied Biomaterials 2000年第1期54卷

作者： Yeli Zhang Chih-Chang Chu Fiber and Polymer Science Program Department of Textiles and Apparel & Biomedical Engineering Program Cornell University Ithaca New York 14853-4401

The objective of this paper was to study the release of bovine serum albumin (BSA) from a series of biodegradable hydrogels having a wide range of hydrophilicity to hydrophobicity, swelling, and biodegradation properties. BSA was incorporated into a series of biodegradable hydrogels made from a dextran derivative of allyl isocyanate (dex-AI, as the hydrophilic constituent) and poly( DL -lactic acid) diacrylate macromer (PDLLAM, as the hydrophobic constituent). The release kinetics of BSA from these dex-AI/PDLLAM hydrogels was studied. Laser confocal scanning microscopy was used to investigate the morphological change of the hydrogels, as well as BSA distribution in the hydrogels, as a function of dex-AI to PDLLAM composition ratio and incubation time. We found that the incorporation of PDLLAM into dex-AI reduced the initial burst release of BSA due to its more homogeneous distribution in the hydrogels. As the PDLLAM component increased, the rate of formation of a loose three-dimensional (3D) network structure increased; consequently, the sustained rate and extent of BSA release increased. Both release index and diffusion coefficient (from release kinetics data) increased as the PDLLAM component increased in the hydrogels. The data suggest that the release of BSA was controlled by both diffusion of BSA through swelling of the hydrophilic phase during an early stage, and degradation of the hydrophobic phase during a late stage, and also that the magnitude of diffusion versus degradation controlled release is dependent on composition ratio and immersion time. © 2000 John Wiley & Sons, Inc.

关键词： dextran poly(lactic acid) hydrogel controlled release albumin laser confocal microscope biodegradation

来源：评论

学校读者我要写书评

暂无评论

Synthesis and characterization of dextran-maleic acid based hydrogel

引用

Journal of Biomedical Materials Research Part B: Applied Biomaterials 1999年第2期46卷

作者： Sin-Hee Kim Chee-Youb Won Chih-Chang Chu Fiber and Polymer Science Program Department of Textiles & Apparel and Biomedical Engineering Program Cornell University Ithaca New York 14853-4401

A new class of hydrogel precursor, dextran-maleic acid (Dex-MA), was synthesized by the reaction of dextran with maleic anhydride in the presence of the catalyst triethylamine. The effects of temperature, time, catalyst amount, and reactant concentration on the degree of substitution (DS) by MA was studied to establish an optimum reaction condition. The new hydrogel precursor had excellent solubility in various common organic solvents. The hydrogels based on Dex-MA precursor were made by the irradiation of Dex-MA with a long wave UV lamp. The Dex-MA hydrogels showed a very high swelling ratio in water, and the magnitude of swelling depended on the pH of the medium and the DS by MA. The Dex-MA hydrogels exhibited the highest swelling ratio in neutral pH, followed by acidic (pH 3) and alkaline pH (10). The most distinctive characteristic of Dex-MA hydrogels was that a carboxylic acid group was generated by the reaction of dextran with maleic anhydride. As a result, the swelling ratio increased with an increase of the DS of the MA segment (ionizable moiety that affects swelling ratio) in the Dex-MA hydrogel. © 1999 John Wiley & Sons, Inc. J Biomed Mater Res, 46, 160–170, 1999.

关键词： dextran maleic anhydride photocrosslinked hydrogel swelling hydrolytic degradation

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：