Dielectric properties of unidirectional and biaxial flax/epoxy composites at frequencies up to 1 GHz

材料科学 复合材料 环氧树脂 相对介电常数 介电常数 体积分数 纤维 电介质 微观结构 电容器 电压 电气工程 光电子学 工程类
作者
Philipp Baron,Philipp Lenz,Klaus Peter Koch,Armin Wittmann,Georg Fischer
出处
期刊:Materials today communications [Elsevier BV]
卷期号:36: 106656-106656
标识
DOI:10.1016/j.mtcomm.2023.106656
摘要

The relative permittivity of flax/epoxy composites in unidirectional and biaxial orientations was mapped in the frequency range of 1 kHz to 200 kHz, and for the first time in the range of 1 MHz to 1 GHz. In addition, permittivity was investigated for the first time in the temperature range between -20 °C and 50 °C. These composites, produced using the vacuum infusion process, are increasingly used for sustainable and lightweight structural components in the automotive industry. The relative permittivity was determined using a self-developed plate capacitor with an LCR bridge and an impedance analyzer. An examination of the microstructure of the flax/epoxy composites shows that the fibers are disordered in the composite, resulting in local variations in fiber volume fraction. Furthermore, it was shown that the matrix also infiltrates into the fiber itself, resulting in an increase of the matrix fraction. It was found that unidirectional fabrics had a higher relative permittivity than biaxial fabrics, due to a higher fiber volume fraction and lower proportion of epoxy. The results suggest that it is the fiber volume fraction, rather than the manufacturing process and fiber orientation, that primarily determines the relative permittivity. It was also found that the permittivity continues to decrease below room temperature and thus behaves in a manner typical of the material in this temperature range as well.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
wanci应助HJJHJH采纳,获得20
4秒前
专注的水壶完成签到 ,获得积分10
6秒前
Bob完成签到 ,获得积分10
6秒前
phy完成签到,获得积分10
6秒前
10秒前
10秒前
LX77bx完成签到,获得积分10
12秒前
外向的醉易完成签到,获得积分10
13秒前
SharonDu完成签到 ,获得积分10
14秒前
15秒前
yuncong323完成签到,获得积分10
16秒前
huohuo完成签到,获得积分10
18秒前
CB完成签到,获得积分10
19秒前
19秒前
20秒前
儒雅路人完成签到,获得积分10
21秒前
OLDBLOW完成签到,获得积分10
22秒前
22秒前
liupangzi完成签到,获得积分10
22秒前
wang完成签到,获得积分10
22秒前
23秒前
Catherkk发布了新的文献求助10
23秒前
lcdamoy完成签到,获得积分10
24秒前
钱浩然发布了新的文献求助10
24秒前
烊烊发布了新的文献求助10
25秒前
十曰完成签到,获得积分10
30秒前
jjjjchou完成签到,获得积分10
31秒前
虚心的不二完成签到 ,获得积分10
33秒前
xuzj应助科研通管家采纳,获得10
34秒前
小马甲应助科研通管家采纳,获得10
34秒前
34秒前
思源应助科研通管家采纳,获得10
34秒前
34秒前
研友_VZG7GZ应助科研通管家采纳,获得10
34秒前
fang应助科研通管家采纳,获得10
34秒前
隐形曼青应助科研通管家采纳,获得10
34秒前
科研通AI5应助科研通管家采纳,获得10
34秒前
FashionBoy应助科研通管家采纳,获得10
34秒前
shiizii应助科研通管家采纳,获得10
34秒前
36秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038235
求助须知:如何正确求助?哪些是违规求助? 3575992
关于积分的说明 11374009
捐赠科研通 3305760
什么是DOI,文献DOI怎么找? 1819276
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022