上海第二工业大学学报
上海第二工業大學學報
상해제이공업대학학보
JOURNAL OF SHANGHAI SECOND POLYTECHNIC UNIVERSITY
2014年
4期
295-300
,共6页
尹徐影%王继芬%关礼辉%谢华清
尹徐影%王繼芬%關禮輝%謝華清
윤서영%왕계분%관례휘%사화청
相变材料%石蜡%棕榈酸%复合材料
相變材料%石蠟%棕櫚痠%複閤材料
상변재료%석사%종려산%복합재료
s:phase change material%paraffin wax%palmitic acid%composite
将石蜡(PW)与棕榈酸(PA)熔融超声共混,制备出了一系列PA/PW复合材料。采用瞬态热丝法(SHW, Short-Hot-Wire)测量PA/PW复合材料的导热系数,用差示扫描量热仪(DSC, Differential Scanning Calorimetric)分析复合材料的相变温度(T )和相变潜热(L),采用红外光谱仪(FTIR, Fourier Transform Infrared)对复合物的组成进行表征。复合材料的红外吸收光谱图表明, PW和PA只是简单的物理混合,未生成新物质。复合相变材料的导热系数大致随温度的升高而降低,而在30和50?C左右时由于固-固和固-液相变的作用,导热系数测量值出现了一定程度的升高。复合材料的Ts-s(固-固相变温度)都比PW的略高；与纯PW相比,除PA的质量分数w=35%之外,其他比例复合材料的Ts-l (固-液相变温度)都较纯PW的低；除w =35%的Ls-l (固-液相变潜热)比纯PW的低之外,其他比例复合材料的Ls-l都比纯PW的Ls-l高。
將石蠟(PW)與棕櫚痠(PA)鎔融超聲共混,製備齣瞭一繫列PA/PW複閤材料。採用瞬態熱絲法(SHW, Short-Hot-Wire)測量PA/PW複閤材料的導熱繫數,用差示掃描量熱儀(DSC, Differential Scanning Calorimetric)分析複閤材料的相變溫度(T )和相變潛熱(L),採用紅外光譜儀(FTIR, Fourier Transform Infrared)對複閤物的組成進行錶徵。複閤材料的紅外吸收光譜圖錶明, PW和PA隻是簡單的物理混閤,未生成新物質。複閤相變材料的導熱繫數大緻隨溫度的升高而降低,而在30和50?C左右時由于固-固和固-液相變的作用,導熱繫數測量值齣現瞭一定程度的升高。複閤材料的Ts-s(固-固相變溫度)都比PW的略高；與純PW相比,除PA的質量分數w=35%之外,其他比例複閤材料的Ts-l (固-液相變溫度)都較純PW的低；除w =35%的Ls-l (固-液相變潛熱)比純PW的低之外,其他比例複閤材料的Ls-l都比純PW的Ls-l高。
장석사(PW)여종려산(PA)용융초성공혼,제비출료일계렬PA/PW복합재료。채용순태열사법(SHW, Short-Hot-Wire)측량PA/PW복합재료적도열계수,용차시소묘량열의(DSC, Differential Scanning Calorimetric)분석복합재료적상변온도(T )화상변잠열(L),채용홍외광보의(FTIR, Fourier Transform Infrared)대복합물적조성진행표정。복합재료적홍외흡수광보도표명, PW화PA지시간단적물리혼합,미생성신물질。복합상변재료적도열계수대치수온도적승고이강저,이재30화50?C좌우시유우고-고화고-액상변적작용,도열계수측량치출현료일정정도적승고。복합재료적Ts-s(고-고상변온도)도비PW적략고；여순PW상비,제PA적질량분수w=35%지외,기타비례복합재료적Ts-l (고-액상변온도)도교순PW적저；제w =35%적Ls-l (고-액상변잠열)비순PW적저지외,기타비례복합재료적Ls-l도비순PW적Ls-l고。
The paraffin wax (PW)/palmitic acid (PA) composites were prepared with ultrasound and stirring. Transientshort-hot-wire method (SHW) was used to measure the thermal conductivity of PA/PW composites. The phase change temperature (T ) and latent heat (L) of the composites were observed by differential scanning calorimetrics (DSC). Fourier transform infrared (FTIR) was used to characterize the component of the composites. The absorption spectra indicated that there were no new chemical bonds between PA and PW. Results showed that the thermal conductivities of composite phase change materials decreased with the increasing of temperature, except for those at about 30 and 50?C, which near the phase change temperatures. The thermal conductivities showed a certain degree of increase in composites at the temperatures near phase change points. Ts-s (solid-solid phase change temperature) of the composites was slightly higher than that of paraffin wax, while Ts-l (solid-liquid phase transition temperature) of most of the composites were lower, except for w=35%(w is the mass fraction of PA). PA/PW composites had higher Ls-l than pure PW, except for w=35%.
