亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Shape-stabilized phase change materials based on polyvinyl alcohol/graphene hybrid aerogels for efficient solar-thermal energy conversion

材料科学 气凝胶 石墨烯 聚乙烯醇 复合材料 化学工程 PEG比率 热能储存 能量转换效率 纳米技术 光电子学 财务 生态学 生物 工程类 经济
作者
Weijie Hong,Zhipeng Liu,Jing-Zhou Chen,Guansong He,Peng Wang,Wenbin Yang,Yongsheng Li,Fangfang He
出处
期刊:Materials Science in Semiconductor Processing [Elsevier BV]
卷期号:169: 107931-107931 被引量:9
标识
DOI:10.1016/j.mssp.2023.107931
摘要

The application of graphene aerogel fabricated by reduction self-assembly and ice template methods is limited due to the difficulties in shape control and poor compression resistance. Here, a series of polyvinyl alcohol/graphene aerogels (PGA) were prepared by the chemical crosslinking and freeze-drying method, in which (3-Aminopropyl) diethoxymethylsilane (APDEMS) used as cross-linking agent and reducing agent, reduce graphene oxide (rGO) and polyvinyl alcohol (PVA) as supporting structural materials. The crosslinking effect and PVA enhancement effect achieved the shape control of aerogels and enhanced the compression resistance. When the content of graphene oxide is 50 mg, the obtained PGA5 hybrid aerogel has better compression-resilience properties with compressive strength of 6.26 KPa at 50 % compression. Then, PGA@PEG shape-stabilized phase change materials (SSPCMs) were prepared by loading PEG into PGA by vacuum impregnation. PGA5@PEG prepared with PGA5, had significant thermal conductivity of 0.481 W m−1 K−1, excellent energy storage performance (phase change enthalpy of 178.6 J/g) and good thermal cycling stability. Moreover, PGA5@PEG had high solar-thermal conversion efficiency of 86.9 %. Accordingly, we designed a solar-thermal water system to broaden the application of SSPCMs in the field of solar-thermal energy conversion. During the 2-h heating process, the PGA5@PEG-water system can rapidly reach a maximum temperature of 57.3 °C, higher than the pure water system (40.4 °C). PGA@PEG SSPCMs would be very promising as latent heat storage/release units for applications in solar energy storage and conversion.
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
7秒前
Lyncon完成签到,获得积分10
11秒前
Milton_z完成签到 ,获得积分0
21秒前
Hung完成签到,获得积分10
24秒前
tingyeh完成签到,获得积分10
30秒前
31秒前
两个我完成签到 ,获得积分10
38秒前
44秒前
54秒前
56秒前
务实书包完成签到,获得积分10
1分钟前
1分钟前
1分钟前
1分钟前
英姑应助科研通管家采纳,获得10
1分钟前
打打应助科研通管家采纳,获得10
1分钟前
1分钟前
24124f发布了新的文献求助10
1分钟前
1分钟前
2分钟前
2分钟前
大闲鱼铭一完成签到 ,获得积分10
2分钟前
干净涵梅发布了新的文献求助10
2分钟前
舒适的藏花完成签到 ,获得积分10
2分钟前
2分钟前
boogie发布了新的文献求助10
2分钟前
testmanfuxk完成签到,获得积分10
2分钟前
2分钟前
polelight发布了新的文献求助30
2分钟前
boogie完成签到,获得积分20
2分钟前
wdy111应助云缘之芒采纳,获得50
2分钟前
2分钟前
小付发布了新的文献求助10
2分钟前
2分钟前
3分钟前
红橙黄绿蓝靛紫111完成签到,获得积分10
3分钟前
cy0824完成签到 ,获得积分10
3分钟前
yyy完成签到 ,获得积分10
3分钟前
SciGPT应助科研通管家采纳,获得10
3分钟前
失眠奥特曼完成签到,获得积分10
3分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
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 3990049
求助须知:如何正确求助?哪些是违规求助? 3532108
关于积分的说明 11256354
捐赠科研通 3270976
什么是DOI,文献DOI怎么找? 1805166
邀请新用户注册赠送积分活动 882270
科研通“疑难数据库(出版商)”最低求助积分说明 809228