本文關鍵詞： 相變材料 十水硫酸鈉 石蠟微膠囊 相變溫度 相變潛熱　出處：《北京石油化工學院》2015年碩士論文　論文類型：學位論文

【摘要】：相變材料(PCM)作為儲能材料具有相變潛熱巨大、性能穩(wěn)定等優(yōu)點,相變材料在相變過程中,可以從周圍環(huán)境中吸收熱(冷)量,并在需要時放出熱(冷)量,該過程中材料自身的溫度不發(fā)生變化,從而達到控制周圍環(huán)境溫度的目的。相變儲能材料作為儲能載體,可緩解能源緊張的難題。與其它同類型相變材料相比,十水硫酸鈉和石蠟具有相變潛熱高,性能穩(wěn)定,無毒無污染,廉價易得等優(yōu)點。但是十水硫酸鈉在結晶過程中容易出現(xiàn)過冷、相分離和結塊問題,而石蠟在固相變?yōu)橐合噙^程中液相容易泄漏,且易其它材料混合而發(fā)生副作用,這限制了它們的應用。本文制備出了性能優(yōu)良、相變溫度為室溫的以十水硫酸鈉為主體成分的相變儲熱體系,較好地解決了十水硫酸鈉相變材料體系的過冷、相分離和結塊問題。該體系的相變焓為107.5J·g-1、相變溫度為27.0℃。最佳配方為十水硫酸鈉75.4%、水12.0%、硼砂3.0%、羧甲基纖維素鈉2.0%、十二烷基苯磺酸鈉0.23%、十二烷基硫酸鈉0.12%、十二水硫酸鋁鉀0.40%、乙二胺四乙酸二鈉鹽0.75%、六偏磷酸鈉0.15%、NaCl 6.0%。采用原位聚合法制備了以石蠟為囊芯,蜜胺樹脂為囊壁的石蠟微膠囊相變材料。通過考察,確定其最佳配方為:三聚氰胺7g,甲醛13mL,乳化劑TA5g,乳化水150mL。最佳實驗條件為攪拌速度1500r/min,石蠟微膠囊芯壁比為5.6:1。本文分別對二種相變材料的相變特性進行了研究。利用傅里葉變換紅外光譜儀、差示掃描量熱儀、掃描電鏡等設備對制備的相變材料進行了測試和表征。
[Abstract]:PCM) as a kind of energy storage material has the advantages of large latent heat and stable performance. In the process of phase transformation, PCM can absorb heat (cold) from the surrounding environment and release heat (cold) when needed. In this process, the temperature of the material itself does not change, thus achieving the purpose of controlling the ambient temperature. As a carrier of energy storage, the phase change energy storage material can alleviate the problem of energy shortage. Sodium sulfate decahydrate and paraffin have the advantages of high latent heat of phase change, stable performance, non-toxic and pollution-free, cheap and easy to obtain. However, sodium sulfate decahydrate is prone to supercooling, phase separation and caking during crystallization. In the process of changing paraffin into liquid phase, the liquid phase is easy to leak, and the side effects of other materials are easy to be mixed, which limits their application. The phase change thermal storage system with sodium sulfate decahydrate as the main component at room temperature can better solve the supercooling of phase change material system with sodium sulfate decahydrate. Phase separation and caking. The enthalpy of phase transition is 107.5 J 路g-1, phase transition temperature is 27.0 鈩，

本文編號：1516738