PDF
摘要
以膨胀珍珠岩(EP)为支撑材料,月桂酸(LA)、肉豆蔻酸(MA)、棕榈酸(PA)和硬脂酸(SA)为相变主材,采用熔融共混法制备膨胀珍珠岩/脂肪酸(EP/FA)复合相变材料。泄漏率是衡量材料封装效果的重要指标之一,通过实验研究了EP添加量、加热时间和加热温度对复合相变材料泄漏率的影响。结果表明,材料的泄漏率随着EP添加量增大而减小,在LA、MA、PA和SA中分别添加质量分数59%、69%、65%、66%的EP,脂肪酸(FA)不会泄漏;EP/LA、EP/MA、EP/PA和EP/SA复合相变材料的泄漏率会随着加热时间的延长而提高,线性拟合结果表明两者相关系数R2大于0.95,说明两者存在一定的线性相关性,加热12h后上述4种复合相变材料的泄漏率分别达到1.48%、1.34%、1.49%和1.17%;4种复合相变材料的泄漏率会随着加热温度升高而增大,加热温度对EP/LA的热稳定性影响最大,对EP/MA影响最小;在不同温度下加热1～3h,4种复合相变材料的泄漏率分别低于0.78%、0.36%、0.45%和0.42%。添加EP能够很好地封装FA,同时提升蓄热温度和时间,但是材料潜热降低,因此采用EP封装有机相变材料时应先进行适当的改性。
Abstract
Expanded perlite/fatty acid composite phase change materials were prepared by melt blending method using expanded perlite (EP) as supporting material and lauric acid (LA),myristic acid (MA),palmitic acid (PA) and stearic acid (SA) as main phase change materials.Leakage rate is one of the important indicators to measure the packaging effect of materials.Therefore,the effects of EP addition mass fraction,heating time and temperature on the leakage rate of the were experimentally analyzed.The results showed that the leakage rate of the composite phase change materials decreased with the increase of EP content.When 59%,69%,65% and 66% of the mass fraction of EP were added to LA,MA,PA and SA,respectively,the fatty acid (FA) did not leak.The leakage rates of EP/LA,EP/MA,EP/PA and EP/SA composites increased with the increase of heating time.The linear fitting results revealed that the correlation coefficient R2 of the two was greater than 0.95,indicating that there was a certain linear correlation between the two.After heating for 12h,the leakage rates of the four materials reached 1.48%,1.34%,1.49% and 1.17%,respectively.The leakage rate of the four composite phase change materials increased with the increase of heating temperature.The heating temperature had the greatest influence on the thermal stability of EP/LA material and the least influence on EP/MA.The leakage rates of the materials heated at different temperatures for 1～3h were lower than 0.78%,0.36%,0.45% and 0.42%,respectively.Adding EP could encapsulate FA well,while increasing the temperature and time of heat storage,but the latent heat of the material was reduced.Therefore,appropriate modification should be carried out first when using EP to encapsulate organic phase change materials.
关键词
熔融共混
/
复合相变材料
/
泄漏率
/
热稳定性
Key words
melt blending
/
composite phase change materials
/
leakage rate
/
thermal stability
膨胀珍珠岩/脂肪酸复合相变材料的制备及封装效果分析[J].
化工新型材料, 2024, 52(10): 113-117 DOI:10.19817/j.cnki.issn1006-3536.2024.10.004
[1] Awni H A,Waref Almanaseer,Atif Alkhazali,et al.Experimental investigation on thermal properties and fire perfor-mance of lauric acid/diphenyl phosphate/expanded perlite as a flame retardant phase change material for latent heat storage applications[J].Sustainable Energy Technologies and Assessments,2023,56(2):103059.
[2] Bian Y D,Wang K J,Wang J L,et al.Affiliation preparation and properties of capric acid:stearic acid/hydrophobic expanded perlite-aerogel composite phase change materials[J].Renewable Energy,2021,179(17):1027-1035.
[3] Salman Hasanabadi,Seyed Mojtaba Sadrameli,Samaneh Sami.Preparation characterization and thermal properties of surface-modified expanded perlite/paraffin as a form-stable phase change composite in concrete[J].Journal of Thermal Analysis and Calorimetry,2021,144(1):61-69.
[4] Zuo X C,Zhao X G,Li J W,et al.Enhanced thermal conductivity of form-stable composite phase-change materials with graphite hybridizing expanded perlite/paraffin[J].Solar Energy,2020,209(15):85-95.
[5] Mehmet Nuri Kolak,Meral Oltulu.Effect of expanded perlite addition on the thermal conductivity and mechanical properties of bio-composites with hemp-filled[J].Journal of Building Engineering,2023,71(15):106515.
[6] Liu X Y,Zhao Y C,Fan Z X,et al.Preparation and characte-rization of lauric acid-stearic acid/expanded perlite as a composite phase change material[J].RSC Advances,2022,37(12):23860-23868.
[7] Fan Z X,Zhao Y C,Ding Y F,et al.Fabrication and comprehensive analysis of expanded perlite impregnated with myristic acid-based phase change materials as composite materials for building thermal management[J].Journal of Energy Sto-rage,2022,55(15):105710.
[8] Zhang X G,Pan D,Zhu G Q,et al.Preparation and characte-rization of form-stable phase-change materials with enhanced thermal conductivity based on nano-Al2O3 modified binary fatty acids and expanded perlite[J].Energy and Buildings,2022,271(8):112330.
[9] Fan Z X,Zhao Y C,Liu X Y,et al.Development of a new composite material for building energy storage based on lauric acid-palmitic acid-paraffin ternary eutectic and expanded perlite[J].Journal of Energy Storage,2022,53(11):105136.
[10] Zhang X G,Wang Z K,Liu X J,et al.Form-stable phase change materials with enhanced thermal conductivity based on binary capric-palmitic acid and graphite carbon in situ modified expanded perlite[J].ACS Appl Energy Mater,2021,4(9):9124-9132.
[11] Zhou D Y,Xiao S Z,Xiao X H.Preparation and thermal performance of fatty acid binary eutectic mixture/expanded graphite composites as form-stable phase change materials for thermal energy storage[J].ACS Omeg,2023,8(9):8596-8604.
[12] 徐众,侯静,李军,等.有机酸/碳纳米管复合相变材料的制备及性能[J].精细化工,2020,37(9):1775-1786.
[13] 徐众,吴恩辉,侯静,等.不同支撑材料/PEG-1500复合相变材料的制备及热性能研究[J].化工新型材料,2023,51(4):275-280;286.
[14] 徐众,吴恩辉,侯静,等.氮化硼/脂肪酸复合相变材料的形状稳定性和导热性分析[J].包装工程,2022,43(17):20-28.
[15] 徐众,侯静,李军,等.不同粒径活性炭/肉豆蔻酸复合相变材料[J].储能科学与技术,2021,10(1):177-189.
[16] 徐众,侯静,吴恩辉,等.石墨对活性炭/脂肪酸复合相变材料潜热和导电性能的影响[J].化工进展,2021,40(7):3878-3891.
基金资助
四川省科技厅国际科技合作项目(2020YFH0195);攀枝花市指导性科技计划项目(2021ZD-S-4);工业固态废弃物土木工程综合开发利用四川省高校重点实验室项目(SC-FQWLY-2022-Y-08);四川省省级大学生创新创业训练计划项目(S202211360050)
