本文選題：分散聚合　切入點(diǎn)：相變材料微膠囊　出處：《北京服裝學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：目前，相變材料微膠囊的壁材是以密胺樹脂、脲醛樹脂等材料為主，且微膠囊的芯材都是單一的相變材料。密胺樹脂和脲醛樹脂由于本身的結(jié)構(gòu)問題會在使用的過程中釋放出甲醛等有害氣體；單一的相變材料，其相變溫度范圍較窄，這些缺點(diǎn)限制了相變材料的應(yīng)用領(lǐng)域。本文選用無甲醛等有害氣體釋放的苯乙烯和甲基丙烯酸的聚合物為壁材，以正十八烷和硬脂酸丁酯為相變材料，分別制備了正十八烷相變材料微膠囊、硬脂酸丁酯相變材料微膠囊以及以十八烷和硬脂酸丁酯為復(fù)合相變材料的復(fù)合相變材料微膠囊。 本論文采用分散聚合法制備以苯乙烯-共聚單體為壁材原料，正十八烷和硬脂酸丁酯為芯材的相變材料微膠囊，借助掃描電子顯微鏡（SEM）、差示掃描量熱儀（DSC）、熱重分析儀（DTA-TG）、激光粒度儀等測試儀器，研究了乳化劑、引發(fā)劑、共聚單體、單體與芯材配比等因素對制備的相變材料微膠囊的結(jié)構(gòu)和性能的影響，對相變材料微膠囊的表面形貌、粒徑大小及分布、熱性能進(jìn)行了表征和分析。將制備的微膠囊試用于棉織物的浸壓和涂層整理，并對整理后的棉織物進(jìn)行相變調(diào)溫功能進(jìn)行了評價。 實(shí)驗(yàn)結(jié)果表明：（1）采用苯乙烯-甲基丙烯酸的聚合物P(St-co-MAA)作為壁材，正十八烷為芯材可以成功制備出相變材料微膠囊。優(yōu)選的工藝條件為：采用苯乙烯與甲基丙烯酸的配比為3:1、芯壁比為1:1、采用1.3%的偶氮二異丁腈、3%的十二烷基硫酸鈉在分散30min后微膠囊的形貌較好，粒徑分布均勻。微膠囊的平均粒徑為10.867μm；熔融相變溫度為30.73℃，相變焓值高達(dá)180J/g。（2）采用苯乙烯-甲基丙烯酸的聚合物P(St-co-MAA)作為壁材，硬脂酸丁酯為芯材可以成功制備出相變材料微膠囊。優(yōu)選的工藝條件為：采用1.6%的偶氮二異丁腈、2%的十二烷基硫酸鈉、芯壁比為1:1時微膠囊的形貌較好，粒徑分布較為均勻。微膠囊的平均粒徑為11.36μm；熔融相變溫度為21.5℃，相變焓值高達(dá)104.05J/g，結(jié)晶相變溫度為15.67℃，相變焓值可達(dá)100.57J/g。（3）實(shí)驗(yàn)采用十八烷和硬脂酸丁酯兩種類別不同的相變材料進(jìn)行復(fù)合，以苯乙烯和甲基丙烯酸的聚合物P(St-co-MAA)為微膠囊的壁材，制備復(fù)合型相變材料微膠囊。優(yōu)選的工藝條件為：采用1.8%的偶氮二異丁腈、2%的十二烷基硫酸鈉、確定了芯壁比為1:1及兩種相變材料的比例為4:6、5:5、6:4時微膠囊的形貌較好，粒徑分布較為均勻。微膠囊的平均粒徑為11.42μm；當(dāng)十八烷與硬脂酸丁酯的比例為4:6、5:5、6:4時，微膠囊的熱焓值分別為103J/g、91.4J/g和87.2J/g，熱焓值很理想。（4）將自制的相變材料微膠囊應(yīng)用浸軋法對棉織物進(jìn)行整理，當(dāng)膠合劑用量為50%、焙烘時間為25min、軋余率為75%時，織物的透氣性較好，，熔融溫度為26.71℃，相變熱焓值為24.83J/g，熱焓值相對理想。（5）將20%的相變材料微膠囊采用涂層整理法整理到棉織物上，賦予織物蓄熱調(diào)溫的功能，并測定整理后織物的熱性能。結(jié)果表明：棉織物的熔融相變溫度為26.03℃，相變熱焓值為25.16J/g，熱焓值相對理想。
[Abstract]:At present, microcapsule phase change material is mainly made of melamine resin, urea formaldehyde resin and other materials, and the micro capsule core material are single phase change materials. Melamine resin and urea formaldehyde resin as the structure itself will release formaldehyde and other harmful gases in the process of use; a single phase change material. The phase transition temperature range is narrow. These disadvantages limit the application of phase change materials. The formaldehyde and other harmful gases release of styrene and methacrylic acid polymer as wall material, with eighteen alkyl and butyl stearate as phase change materials, were prepared microcapsules is eighteen alkyl PCM microcapsules, butyl stearate phase change materials and eighteen alkanes and stearic acid ester composite phase change material of composite PCM microcapsules.
This paper adopts polymerization with styrene monomers as wall material is dispersed, eighteen alkanes and butyl stearate as PCM microcapsules, scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analyzer (DTA-TG) test instrument, laser particle size analyzer so, the research of emulsifier, initiator, comonomer, affect the structure and properties of monomer and core material ratio on the phase change material preparation of microcapsules, the microcapsules surface morphology, particle size and particle size distribution, thermal properties were characterized and analyzed. The micro capsule will try the preparation of cotton fabrics to soak and coating, and the fabric of the temperature regulating function were evaluated.
The experimental results show that: (1) using polymer P styrene methacrylic acid (St-co-MAA) as the wall material is eighteen alkyl as the core material can be successfully prepared by microencapsulated phase change material. The optimum condition is: using styrene and methyl methacrylate ratio is 3:1, the ratio of core to wall is 1:1, with 1.3% azo two azobisisobutyronitrile, morphology twelve sodium dodecyl sulfate in 3% 30min microcapsules have good dispersion, uniform particle size distribution. The mean particle diameter of 10.867 mu m; melting phase transition temperature of 30.73 DEG C, the enthalpy value up to 180J/g. (2) using polymer P styrene methyl acrylic acid (St-co-MAA) as the wall material of butyl stearate as the core material can be successfully prepared by microencapsulated phase change material. The optimum condition is: using 1.6% two azo isobutyronitrile, twelve sodium dodecyl sulfate 2%, the ratio of core to wall for microcapsules were better when 1:1, the grain size distribution is all Well. The mean particle diameter of 11.36 mu m; melting phase transition temperature of 21.5 DEG C, the enthalpy value of up to 104.05J/g, the crystallization temperature of 15.67 DEG C, the enthalpy value up to 100.57J/g. (3) experiment with phase change materials of eighteen alkanes and butyl stearate and two kinds of different compound, with styrene polymer P and methacrylic acid (St-co-MAA) as wall material of microcapsule, preparation of microcapsule composite phase change material. The optimum condition is: using 1.8% two azo isobutyronitrile, twelve sodium dodecyl sulfate 2%, determine the core wall ratio is 1:1 and two kinds of phase-change material ratio of microcapsules were good 4:6,5:5,6:4, particle size distribution is more uniform. The mean particle diameter of 11.42 mu m; when eighteen alkyl and butyl stearate ratio was 4:6,5:5,6:4, the enthalpy of microcapsules were 103J/g, 91.4J/g and 87.2J/g, the enthalpy value is ideal. (4) the self-made MicroPCMs using padding method of finished cotton fabric, when the cement dosage is 50%, the curing time is 25min, rolling over rate is 75%, the fabric permeability is better, the melting temperature is 26.71 DEG C, the transformation enthalpy value is 24.83J/g, the enthalpy value is relatively ideal. (5) the micro 20% capsule phase change material by coating finishing method finishing to cotton fabrics, gives the fabric thermal regulating function, and determination of thermal properties of the finished fabrics. The results show that the melting temperatures of cotton fabric is 26.03 DEG C, the transformation enthalpy value is 25.16J/g, the enthalpy value is relatively ideal.

【學(xué)位授予單位】：北京服裝學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB34

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