以生物质为基础的形状稳定复合相变材料,具有高太阳能热转换效率,用于储存热能
Ning Gao1, Jiaoli Du1, Wenbo Yang1
1College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China.
Polymers
|September 28, 2023
概括
研究人员使用带有聚乙烯甘醇 (PEG) 和八度甘 (OD) 的松多孔碳 (PCC) 开发了新的形状稳定相变材料. 这些材料通过有效调节温度和减少能源消耗来提高建筑的能源效率.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 可持续建筑材料 可持续建筑材料
背景情况:
- 全球能源危机迫使建筑物需要节能解决方案.
- 生物多孔碳材料为开发先进建筑材料提供了一种可持续的方法.
- 换相材料 (PCM) 对于热能储存和温度调节至关重要.
研究的目的:
- 用于从可再生有机废物中提取的松多孔碳 (PCC) 制备形状稳定相变材料 (SSPCMs).
- 研究聚乙烯甘醇/PCC (PEG/PCC) 和八度甘/PCC (OD/PCC) 复合物的热性能和太阳能热能转换效率.
- 为了评估这些SSPCM在被纳入刚性聚氨泡复合材料时的温度控制能力.
主要方法:
- 松生物质通过用氧化 (KOH) 的化学激活转化为多孔碳 (PCC).
- 聚乙烯甘醇 (PEG) 和八甘 (OD) 用真空方法浸入PCC,以创建PEG/PCC和OD/PCC.
- 通过调整化温度和KOH度来优化PCC的形态,特定表面积和孔积.
- 测量了相变度,太阳能热能转换效率和刚性聚氨泡中的温度调节效应.
主要成果:
- 优化的PCC表现出高的特定表面积和毛孔体积,具有类似毛虫和块状形态.
- 在PEG/PCC和OD/PCC复合物中,相变度高 (分别为144.3J/g和162.3J/g).
- 太阳能热能转换效率为PEG/PCC达到79.9%,为OD/PCC达到84.8%.
- 将PEG/PCC和OD/PCC纳入刚性聚氨泡增强了温度调节,显示出明显的能量吸收 (25°C) 和释放 (10°C) 平原.
结论:
- 可再生的松废物可以有效地转化为有孔的碳,用于先进的相变材料.
- 开发的PEG/PCC和OD/PCC复合材料具有出色的热能储存和太阳能热转换性能.
- 这些SSPCM显著提高了建筑材料的温度控制能力,从而降低了能源消耗.
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