石蜡基核壳结构相变储能复合材料的制备及性能

何绪权; 王政华; 张玲; 李春忠

doi:10.14135/j.cnki.1006-3080.20210512001

石蜡基核壳结构相变储能复合材料的制备及性能

doi: 10.14135/j.cnki.1006-3080.20210512001

何绪权^1,,
王政华²,
张玲^1, ,,
李春忠^1, ,

1.
上海多级结构纳米材料工程技术研究中心，华东理工大学材料科学与工程学院，上海 200237
2.
上海汉特工程塑料有限公司，上海 201108

基金项目: 国家自然科学基金（21878092，21838003）；上海市教育委员会科研创新计划；上海市优秀学术/技术带头人计划（19XD1401400）

详细信息

作者简介:
何绪权(1995—)，男，山东日照人，硕士生，研究方向为相变储能复合材料。E-mail：19921252560@163.com

通讯作者:
张　玲，E-mail：zlingzi@ecust.edu.cn

李春忠，E-mail：czli@ecust.edu.cn

中图分类号: TB33
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- 文章访问数: 251
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- PDF下载量: 30
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-12
- 网络出版日期: 2021-07-12

Preparation and Properties of Paraffin-Based Core-Shell Phase Change Energy Storage Composites

HE Xuquan^1
,,
WANG Zhenghua²,
ZHANG Ling^{1
, ,},
LI Chunzhong^{1
, ,}

1.
Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
2.
Shanghai Hunt Engineering Plastics Co. Ltd, Shanghai 201108, China

摘要

摘要: 将石蜡熔融浸渍在膨胀石墨(EG)中得到核组分(EG-Paraffin)，将制得的Paraffin@SiO₂微胶囊填充在环氧树脂(Ep)中得到壳组分(Ep-Paraffin@SiO₂)，然后通过简单的模压成型制备了具有宏观核-壳结构的相变复合材料(EG-Paraffin/Ep-Paraffin@SiO₂)。实验结果表明，这种宏观的核-壳结构赋予了相变复合材料优异的防泄漏性能和形状稳定性。壳组分中的微胶囊使相变复合材料保持较高的焓值(大于144 J/g)。而核组分中的膨胀石墨一方面能够有效封装石蜡，另一方面可以大大提升相变复合材料的传热速率。
- 相变储能复合材料 /
- 微胶囊 /
- 模压成型 /
- 宏观核-壳结构
Abstract: The core component (EG-Paraffin) was obtained by impregnation of Paraffin in expanded graphite (EG), and the shell component (Ep-Paraffin@SiO₂) was obtained by filling the obtained Paraffin@SiO₂ microcapsules into epoxy resin. The EG-Paraffin/Ep-Paraffin@SiO₂ phase change composite with macroscopic core-shell structure was prepared by simple molding. The experimental results showed that the macroscopic core-shell structure endowed the phase change composite with excellent leak-proof performance and shape stability. The microcapsules in the shell component maintained a high enthalpy (greater than 144 J/g) of the phase change composite. On the one hand, EG in the core component could encapsulate the paraffin effectively; On the other hand, the heat transfer rate of the phase change composites could be greatly improved. The excellent comprehensive performance of this phase change composite had great application potential in the field of thermal energy storage and thermal management.
- phase change energy storage composites /
- microcapsule /
- mould pressure forming /
- macroscopic core-shell structure

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图 1 Paraffin@SiO₂微胶囊的制备流程图

Figure 1. Preparation process of Paraffin@SiO₂ microcapsules

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图 2 EG-paraffin/Ep-Paraffin@SiO₂的制备流程图

Figure 2. Preparation process diagram of EG-paraffin/Ep-Paraffin@SiO₂

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图 3 微胶囊样品的图像及谱图

Figure 3. Image and spectra of microcapsule samples

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图 4 EG-Paraffin在60 ℃下加热1 h前后的泄露图片

Figure 4. Leakage pictures of EG-Paraffin before and after heating at 60 ℃ for 1 h

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图 5 复合材料样品的形貌表征

Figure 5. Morphology characterization of composite samples

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图 6 核组分(EG-Paraffin)和壳组分(Ep-Paraffin@SiO₂)的DSC曲线

Figure 6. DSC curves of core component (EG-Paraffin) and shell component (Ep-Paraffin@SiO₂)

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图 7 样品在受力时的泄露率和形状稳定性

Figure 7. Leakage rate and stability of the sample under load

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图 8 EG-Paraffin、Ep-Paraffin@SiO₂ 和EG-Paraffin/Ep-Paraffin@SiO₂的温度（上表面）-时间曲线

Figure 8. Temperature (the upper surface)-time curves of EG-Paraffin, Ep-Paraffin@SiO₂ and EG-Paraffin/Ep-Paraffin@SiO₂

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图 9 100次热循环前后EG-Paraffin (a)和Ep-Paraffin@SiO₂(b)的DSC曲线

Figure 9. DSC curves of EG-Paraffin (a) and Ep-Paraffin@SiO₂ (b) before and after 100 thermal cycles

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图 10 相变复合材料板

Figure 10. Phase change composite board

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表 1 核组分（EG-Paraffin）和壳组分（Ep-Paraffin@SiO₂）的组成配方

Table 1. Formulation of core component (EG-Paraffin) and the shell component (Ep-Paraffin@SiO₂)

w(EG-Paraffin)/%		w(Ep-Paraffin@SiO₂)/%
EG	Paraffin	Ep	Paraffin@SiO₂
8	92	60	40

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表 2 石蜡、核组分（EG-Paraffin）和壳组分（Ep-Paraffin@SiO₂）的DSC数据

Table 2. DSC data of paraffin, core component (EG-Paraffin) and shell component (Ep-Paraffin@SiO₂)

Sample	H_m/ (J·g⁻¹)	T_m/ ℃	H_s/ (J·g⁻¹)	T_s/ ℃
Paraffin	227.87	45.22/47.02	224.85	38.66/42.56
EG-Paraffin	205.46	45.47/48.07	207.65	37.60/42.08
Ep-Paraffin@SiO₂	53.64	44.84/47.04	53.75	36.95/43.13
m—Melting process; S—Solidifying process

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表 3 EG-Paraffin/Ep-Paraffin@SiO₂和对比样品(EG-Paraffin/Ep)的核/壳比例和热焓值

Table 3. Core/shell ratio and enthalpy of EG-Paraffin/Ep-Paraffin@SiO₂ and the comparison sample (EG-Paraffin/Ep)

Sample ^a)	w (Core component)^c)/%	w (Shell component)^d)/%	ΔH_{m,theoretical}/ （J·g⁻¹）
EG-Paraffin/ Ep-Paraffin@SiO₂	55.00	45.00	137.14
EG-Paraffin/Ep ^b)	50.90	49.10	104.58
a) The sample is a cylinder with a base diameter of 14.65~14.80 mm and a height of 6.20~6.30 mm; b) Contrast sample; c) The nuclear component is EG-Paraffin; d) The shell components of the two samples are Ep-Paraffin@SiO₂ and Ep, respectively; And the thickness of the shell is 0.85~1.00 mm

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表 4 100次热循环前后EG-Paraffin和Ep-Paraffin@SiO₂的DSC数据

Table 4. DSC data of EG-Paraffi and Ep-Paraffin@SiO₂ before and after 100 thermal cycles

Sample	Cycle	H_m/（J·g⁻¹）	T_m/℃	H_s/ （J·g⁻¹）	T_s/℃
EG-Paraffin	1st	206.46	45.47/48.07	207.65	37.60/42.08
EG-Paraffin	100 th	205.86	45.32/48.03	206.52	37.73/42.08
Ep-Paraffin@SiO₂	1st	53.64	44.84/47.04	54.65	36.95/43.13
Ep-Paraffin@SiO₂	100 th	53.15	44.62/47.09	53.93	32.19/38.54
m—Melting process; S—Solidifying process

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表 5 相变复合材料板的相关参数

Table 5. Related parameters of the phase change composite board

w (Core component)/%	w (Shell component)/%	m_total/g	Size/cm	ΔH_m,_theoretical/ (J·g⁻¹)
59.6	40.40	73.00	10×10×1	144.12

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