本文選題：相變儲能材料 + 層狀類鈣鈦礦材料��； 參考：《山東農(nóng)業(yè)大學(xué)》2016年碩士論文

【摘要】：相變儲能材料是通過物質(zhì)相態(tài)轉(zhuǎn)化來儲存或釋放能量的功能材料,目前被廣泛的應(yīng)用于軍事、建筑、醫(yī)藥、航空航天等領(lǐng)域,大幅提高能源的利用率。但目前相變材料存在的相變溫度適用范圍小、儲能密度低、過冷度大等問題限制了其適用范圍,性能優(yōu)良的相變材料并不能完全滿足各種工作環(huán)境要求。四氯合鋅酸十四烷基銨[(C_(14)H29NH3)2Zn Cl4,C_(14)Zn]是一種層狀類鈣鈦礦型固-固相變儲能材料,在外觀結(jié)構(gòu)上具有明顯的層狀結(jié)構(gòu),分子內(nèi)部為有機(jī)-無機(jī)雜化層,具有穩(wěn)定的晶體結(jié)構(gòu)。在熱力學(xué)性能方面,儲熱密度高,相變焓值大,過冷度相對較小,相變過程無液相、氣相生成,化學(xué)性能穩(wěn)定且環(huán)境友好。硅膠(SG)和多孔玻璃(CPG)是孔徑大小固定,內(nèi)部孔道分布均勻的常見多孔材料,在本實(shí)驗(yàn)中,利用硅膠和多孔玻璃特有的孔道小尺寸效應(yīng)、孔道壁表面與界面效應(yīng)和多孔材料內(nèi)部的宏觀量子隧道效應(yīng),對相變材料的熱力學(xué)性能進(jìn)行調(diào)控。本研究基于液相反應(yīng)法制備了相變材料四氯合鋅酸十四烷基銨(C_(14)H29NH3)2Zn Cl4,利用溶液浸漬法制備C_(14)Zn/SG(d=15-200nm)和C_(14)Zn/CPG(d=11.5-300 nm)復(fù)合相變儲能材料。通過DSC、SEM、XRD等手段表征了上述材料的熱力學(xué)性能和結(jié)構(gòu)特征,探究了不同種類以及不同孔徑的多孔材料對相變材料四氯合鋅酸十四烷基銨儲熱性能的調(diào)控。本研究的主要工作如下:(1)基于液相反應(yīng)法,制備四氯合鋅酸十四烷基銨(C_(14)H29NH3)2Zn Cl4,并用SEM、XRD、DSC等手段表征產(chǎn)物的結(jié)構(gòu)和熱力學(xué)性能。(2)利用SEM、XRD、DSC表征硅膠SG和多孔玻璃CPG的結(jié)構(gòu)和熱力學(xué)性能,探究硅膠和多孔玻璃的凈化。(3)基于溶液浸漬法,利用多孔材料對溶液的吸附性能,將(C_(14)H29NH3)2Zn Cl4(C_(14)Zn)吸附進(jìn)不同孔徑的硅膠SG和多孔玻璃CPG內(nèi),加熱并真空抽濾、除盡無水乙醇,制備C_(14)Zn/SG(d=15-200nm)和C_(14)Zn/CPG(d=11.5-300 nm)復(fù)合材料。并用SEM、XRD、DSC等手段表征其結(jié)構(gòu)和熱力學(xué)參數(shù),研究不同種類以及不同孔徑的多孔材料對四氯合鋅酸十四烷基銨儲熱性能的調(diào)控。
[Abstract]:Phase change energy storage material is a functional material that stores or releases energy through the phase state of material. It is widely used in military, construction, medicine, aerospace and other fields, and greatly improves the utilization of energy. However, the application of phase change materials has limited application range, low energy storage density and supercooling, which restrict its application. The phase change materials with excellent performance can not fully meet the requirements of various working conditions. Four chloro zincic acid fourteen alkyl ammonium [(C_ (14) H29NH3) 2Zn Cl4, C_ (14) Zn] is a layered perovskite solid solid phase variable storage material with distinct layered structure in appearance, and the internal molecule is organic-inorganic hybrid layer, and is stable. In terms of thermodynamic properties, the heat storage density is high, the enthalpy of phase transition is large, the supercooling is relatively small, the phase transition process is no liquid phase, the gas phase is generated, the chemical properties are stable and the environment is friendly. The silica gel (SG) and the porous glass (CPG) are the common porous materials with fixed pore size and uniform distribution of the inner pore. In this experiment, silica gel and porous glass are used in this experiment. The small size effect of glass, the surface of the pore wall and the interface effect and the macroscopic quantum tunneling effect inside the porous material regulate the thermodynamic properties of the phase change material. This study is based on the liquid phase reaction method to prepare the phase change material four chloro zincic acid fourteen alkyl ammonium (C_ (14) H29NH3) 2Zn Cl4, and the preparation of C_ (14) Zn/S by solution impregnation method. G (d=15-200nm) and C_ (14) Zn/CPG (d=11.5-300 nm) composite phase change energy storage materials were used to characterize the thermodynamic and structural characteristics of the above materials by DSC, SEM, XRD and other means. The main work of this study was to explore the regulation of the heat storage properties of different kinds and different pore sizes on the phase change material, four chloro zincic acid fourteen alkyl ammonium. (1) (1) preparation of four chloro zincic acid fourteen alkyl ammonium (C_ (14) H29NH3) 2Zn Cl4 based on liquid phase reaction method, and using SEM, XRD, DSC and other means to characterize the structure and thermodynamic properties of the products. (2) using SEM, XRD, DSC to characterize the structure and thermodynamic properties of silica gel SG and porous glass CPG, and to explore the purification of silica gel and porous glass. (3) based on solution impregnation method, profit (C_ (14) H29NH3) 2Zn Cl4 (C_ (14) Zn) was adsorbed in silica gel SG and porous glass CPG with different pore sizes by using porous materials. The structure and thermodynamic parameters of C_ (14) Zn/SG (d=15-200nm) and C_ (14) composites were prepared by heating and vacuum filtration. Number of porous materials with different pore size and different pore sizes were used to control the thermal storage properties of four ammonium chloride fourteen alkyl ammonium.
【學(xué)位授予單位】：山東農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TB34

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