發(fā)布時(shí)間：2018-06-15 13:03

  本文選題：聚乙二醇 + 十七醇　； 參考：《山東農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：相變材料(PCM-Phase Change Material)具有在一定溫度范圍內(nèi)改變其物理狀態(tài)的能力,物理性質(zhì)轉(zhuǎn)變的過程為相變過程,在該過程中相變材料吸收或釋放大量的潛熱。根據(jù)相變材料的這種性能,通過恰當(dāng)?shù)脑O(shè)計(jì),可以有效提高能源的利用率,有利于滿足人們對(duì)能源日益增長(zhǎng)的需求。聚乙二醇(PEG)是一系列分子量不同的聚合物,相變溫度范圍為3.2°C~68.7°C。由于聚乙二醇具有合適的相變溫度、較高的相變焓、化學(xué)穩(wěn)定性好、價(jià)格低廉等特點(diǎn),而成為了具有廣泛應(yīng)用前景的相變儲(chǔ)能材料。十七醇(C17OH)是一種無支鏈的飽和脂肪醇,晶體結(jié)構(gòu)豐富,納米限域下可能會(huì)有新相產(chǎn)生。本研究利用溶液浸漬法將相變材料填充到了多孔材料孔內(nèi),制備了相應(yīng)的復(fù)合相變材料,并對(duì)其相關(guān)性能進(jìn)行了研究。本研究主要工作內(nèi)容如下:利用溶液浸漬法,通過多孔材料的吸附作用,制備了PEG10k/SG、PEG2k/SG復(fù)合材料和C17OH/SG、C17OH/CPG和C17OH/SBA-15復(fù)合相變材料。使用差示掃描量熱儀(DSC)對(duì)制備的復(fù)合材料的相變溫度、相變焓等性能參數(shù)進(jìn)行相關(guān)研究及分析。實(shí)驗(yàn)結(jié)果表明,隨著硅膠孔徑的減小,復(fù)合材料的相變溫度和相變焓都隨之減小,且PEG10k/SG復(fù)合材料的下降幅度比PEG2k/SG復(fù)合材料的大。使用DSC對(duì)復(fù)合材料進(jìn)行十次及以上的熱循環(huán)性能測(cè)試,并研究其過冷度等相關(guān)熱性能。實(shí)驗(yàn)結(jié)果表明復(fù)合材料的熱循環(huán)性能穩(wěn)定,且其過冷度隨著孔徑的減小而增大。利用傅立葉變換紅外光譜(FT-IR)、掃描電子顯微鏡(SEM)、X射線衍射(XRD)等手段對(duì)復(fù)合材料進(jìn)行相關(guān)性研究。實(shí)驗(yàn)結(jié)果表明,受限于納米級(jí)硅膠孔內(nèi)的聚乙二醇的結(jié)構(gòu)沒有發(fā)生改變,即介孔材料與填充材料之間只存在簡(jiǎn)單的物理吸附作用,并沒有發(fā)生化學(xué)變化。
[Abstract]:PCM-Phase change material (PCM-Phase change material) has the ability to change its physical state within a certain temperature range. The process of physical property transformation is a phase transition process, in which the PCM-Phase change material absorbs or releases a large amount of latent heat. According to the properties of phase change materials, the energy efficiency can be improved effectively by proper design, which is beneficial to meet the increasing demand for energy. Polyethylene glycol (PEG) is a series of polymers with different molecular weights. The transition temperature ranges from 3.2 擄C to 68.7 擄C. Polyethylene glycol (PEG) has become a widely used phase change energy storage material due to its suitable phase transition temperature, high enthalpy of phase transition, good chemical stability and low price. Octadecanol C _ (17) O _ (H) is a branchless saturated fatty alcohol with abundant crystal structure. In this study, phase change materials were filled in porous materials by solution impregnation method, and the corresponding composite phase change materials were prepared, and their related properties were studied. The main work of this study is as follows: by solution impregnation, PEG10k / SGG2k / SG composites and C17OH- / SG-C17OH- / CPG and C17OH- / SBA-15 composite phase change materials were prepared by adsorption of porous materials. The phase transition temperature and enthalpy of the composites were studied and analyzed by differential scanning calorimeter (DSC). The experimental results show that the phase transition temperature and enthalpy of the composites decrease with the decrease of the pore size of silica gel, and the decrease of PEG 10 k / SG composite is larger than that of PEG 2 k / SG composite. The thermal cycling properties of composites were tested by DSC for 10 times or more, and the relative thermal properties such as undercooling degree were studied. The experimental results show that the thermal cycling performance of the composites is stable and the undercooling degree increases with the decrease of pore size. The correlation of the composites was studied by means of Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The experimental results show that the structure of polyethylene glycol confined to nano-silica gel does not change, that is, there is only a simple physical adsorption between mesoporous material and filling material, but no chemical change.
【學(xué)位授予單位】：山東農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB34

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張巨松;周琳;邢韻;;相變材料應(yīng)用在日光溫室中的效果研究[J];沈陽(yáng)建筑大學(xué)學(xué)報(bào)(自然科學(xué)版);2016年06期

2 尚建麗;張浩;熊磊;麻向龍;;基于傅里葉紅外光譜的SiO_2基相變儲(chǔ)濕復(fù)合材料結(jié)構(gòu)分析及性能優(yōu)選預(yù)測(cè)[J];光譜學(xué)與光譜分析;2016年08期

3 史巍;王傳濤;;相變材料研究綜述[J];硅酸鹽通報(bào);2015年12期

4 張英;邴慧;楊成松;;基于SEM和MIP的凍融循環(huán)對(duì)粉質(zhì)黏土強(qiáng)度影響機(jī)制研究[J];巖石力學(xué)與工程學(xué)報(bào);2015年S1期

5 白艷萍;張玉忠;;相變材料的分類及其應(yīng)用研究[J];科技風(fēng);2015年08期

6 魏X;馬殙;;化學(xué)法制備相變材料微膠囊的研究進(jìn)展[J];現(xiàn)代化工;2014年10期

7 張秋香;陳建華;陸洪彬;唐偉;陸玉;高揚(yáng)之;;細(xì)粒徑石蠟微膠囊相變材料的制備與性能[J];高等學(xué)�；瘜W(xué)學(xué)報(bào);2014年10期

8 孟多;趙薇;;新戊二醇/環(huán)氧樹脂復(fù)合相變材料的制備和性能[J];新型建筑材料;2014年04期

9 李強(qiáng);于景媛;穆柏春;孫旭東;;溶膠-凝膠法改性碳纖維增強(qiáng)納米HA復(fù)合材料的制備及性能研究[J];人工晶體學(xué)報(bào);2014年03期

10 王彥紅;張成亮;俞會(huì)根;盛軍;宋佳;曹艷軍;;相變材料在動(dòng)力電池?zé)峁芾碇械膽?yīng)用研究進(jìn)展[J];功能材料;2013年22期

相關(guān)碩士學(xué)位論文 前1條

1 冷從斌;膨脹石墨/水合鹽復(fù)合定型相變材料制備與性能分析[D];云南師范大學(xué);2015年

，

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