超声波辅助制备超细粒径双壳相变储湿胶囊及其性能
|
摘要
采用超声波技术辅助制备以正十八烷为核材、甲基丙烯酸甲酯为内壳、壳聚糖为外壳的超细粒径双壳相变储湿胶囊,考察乳化剂、引发剂、交联剂对超细粒径双壳相变储湿胶囊的粒径分布、相变调温性能、储湿调湿性能与微观形貌的影响。结果表明:超细粒径双壳相变储湿胶囊的最佳工艺参数:正十八烷(N-O)用量5.0 g、司盘-80用量1.0 g、吐温-80用量0.5 g、十六烷基三甲基溴化铵(CTAB)用量0.2 g、十二烷基硫酸钠(SDS)用量0.3 g、苯乙烯(St)用量5.0 g、偶氮二异丁腈(AIBN)用量0.3 g、甲基丙烯酸甲酯(MMA)用量3.5 g、壳聚糖(C)用量3.0 g、二乙烯基苯(DVB)用量0.2 g、四乙烯五胺(TEPA)用量0.2 g、超声波功率700 W。超细粒径双壳相变储湿胶囊的粒径分布为124.60～389.10 nm,其中d_(50)=217.63 nm;超细粒径双壳相变储湿胶囊具有良好的相变调温性能与储湿调湿性能,即相变温度为26.75～29.53℃、相变焓为70.67～72.84 J/g、渗透率为6.45%～7.52%,相对湿度35%～65%的平衡含湿量为0.0583～0.1276 g/g、损耗率为5.71%～6.90%。
Double-shell phase change humidity storage capsule was prepared by ultrasonic technology using noctadecane as core material,methyl methacrylate as inner shell,chitosan as outside shell,which presented ultrafine particle size. The effect of emulsifier,initiator and crosslinking agent on particle size distribution,phase change temperature controlling performance,humidity storage humidity controlling performance and microstructure of the capsules was investigated. The results revealed that the best process parameters of double-shell phase change humidity storage capsules:n-octadecane(N-O)amount is 5.0 g,Span-80 amount is 1.0 g,Tween-80 amount is 0.5 g,cetyltrimethyl ammonium bromide(CTAB)amount is 0.2 g,sodium lauryl sulphate(SDS)amount is 0.3 g,styrene(St)amount is 5 g,azodiisobutyronitrile(AIBN)amount is 0.3 g,methyl methacrylate(MMA)amount is 3.5 g,chitosan(C)amount is 3.0 g,divinyl benzene(DVB)amount is 0.2 g,tetraethylenepentamine(TEPA)amount is 0.2 g,ultrasonic power is 700 W. The capsules presented particle size distribution from the 124.60 nm to 389.10 nm,with d_(50) of217.63 nm. And also,the double-shell phase change humidity storage capsules showed good phase change temperature controlling performance and humidity storage humidity controlling performance,such as phase transition temperature is26.75-29.53 ℃,phase change enthalpy is 70.67-72.84 J/g,permeability is 6.45%-7.52%,equilibrium moisture content is 0.0583-0.1276 g/g in relative humidity of 35%-65% and attrition rate of 5.71%-6.90%.
Double-shell phase change humidity storage capsule was prepared by ultrasonic technology using noctadecane as core material,methyl methacrylate as inner shell,chitosan as outside shell,which presented ultrafine particle size. The effect of emulsifier,initiator and crosslinking agent on particle size distribution,phase change temperature controlling performance,humidity storage humidity controlling performance and microstructure of the capsules was investigated. The results revealed that the best process parameters of double-shell phase change humidity storage capsules:n-octadecane(N-O)amount is 5.0 g,Span-80 amount is 1.0 g,Tween-80 amount is 0.5 g,cetyltrimethyl ammonium bromide(CTAB)amount is 0.2 g,sodium lauryl sulphate(SDS)amount is 0.3 g,styrene(St)amount is 5 g,azodiisobutyronitrile(AIBN)amount is 0.3 g,methyl methacrylate(MMA)amount is 3.5 g,chitosan(C)amount is 3.0 g,divinyl benzene(DVB)amount is 0.2 g,tetraethylenepentamine(TEPA)amount is 0.2 g,ultrasonic power is 700 W. The capsules presented particle size distribution from the 124.60 nm to 389.10 nm,with d_(50) of217.63 nm. And also,the double-shell phase change humidity storage capsules showed good phase change temperature controlling performance and humidity storage humidity controlling performance,such as phase transition temperature is26.75-29.53 ℃,phase change enthalpy is 70.67-72.84 J/g,permeability is 6.45%-7.52%,equilibrium moisture content is 0.0583-0.1276 g/g in relative humidity of 35%-65% and attrition rate of 5.71%-6.90%.
引文
[1]Rao Z H,Wang S F,Zhang Z G.Energy saving latent heat storage and environmental friendly humiditycontrolled materials for indoor climate[J].Renewable and Sustainable Energy Reviews,2012,16(5):3136-3145.
[2]Huynh C K.Building energy saving techniques and indoor air quality:A dilemma[J].International Journal of Ventilation,2010,9(1):93-98.
[3]Zhu N,Ma Z J,Wang S W.Dynamic characteristics and energy performance of buildings using phase change materials:A review[J].Energy Conversion and Management,2009,50(12):3169-3181.
[4]Sharma A,Tyagi V V,Chen C R,et al.Review on thermal energy storage with phase change materials and applications[J].Renewable and Sustainable Energy Reviews,2009,13(2):318-345.
[5]Baker J.New technology and possible advances in energy storage[J].Energy Policy,2008,36(12):4368-4373.
[6]Pacheco R,Ordó?ez J,Martínez G.Energy efficient design of building:A review[J].Renewable and Sustainable Energy Reviews,2012,16(6):3559-3573.
[7]Park S K,Kim J H J,Nam J W,et al.Development of anti-fungal mortar and concrete using zeolite and zeocarbon microcapsules[J].Cement&Concrete Composites,2009,31(7):447-453.
[8]Borreguero A M,Carmona M,Sanchez M L,et al.Improvement of the thermal behaviour of gypsum blocks by the incorporation of microcapsules containing PCMSobtained by suspension polymerization with an optimal core/coating mass ratio[J].Applied Thermal Engineering,2010,30(10):1164-1169.
[9]尚建丽,张浩,董莉,等.双壳微纳米相变胶囊制备影响因素的研究[J].材料研究学报,2015,29(2):135-142.[9]Shang Jianli,Zhang Hao,Dong Li,et al.Study of influential factors in double-shell phase change micronano capsules preparation[J].Chinese Journal of Materials Research,2015,29(2):135-142.
[10]Lee S H,Yoon S J,Kim Y G,et al.The utilization of micro-encapsulated phase change material wallboards for energy saving[J].Korean Journal of Chemical Engineering,2011,28(11):2206-2210.
[11]Dale P,Randy T.Potential applications of phase change materials in concrete technology[J].Cement&Concrete Composites,2007,29(7):527-532.
[12]张秋香,陈建华,陆洪彬,等.细粒径石蜡微胶囊相变材料的制备与性能[J].高等学校化学学报,2014,35(10):2258-2264.[12]Zhang Qiuxiang,Chen Jianhua,Lu Hongbin,et al.Preparation and properties of paraffin microencapsulated phase-change materials with fine particle size[J].Chemical Journal of Chinese Universities,2014,35(10):2258-2264.
[13]张秋香,陈建华,陆洪彬,等.纳米二氧化硅改性石蜡微胶囊相变储能材料的研究[J].高分子学报,2015,(6):692-698.[13]Zhang Qiuxiang,Chen Jianhua,Lu Hongbin,et al.Studies on nanosilica modified paraffin microcapsule phase change energy storage materials[J].Acta Polymerica Sinica,2015,(6):692-698.
[14]尚建丽,王思,董莉.PAR/POL/SOD复合微胶囊的制备及热湿性能研究[J].功能材料,2013,44(8):1141-1144.[14]Shang Jianli,Wang Si,Dong Li.Prepared of PAR/POL/SOD-composite-wall microencapsulated and research of energy storage and humidity-control performance[J].Journal of Functional Materials,2013,44(8):1141-1144.
[15]尚建丽,李乔明,王争军.微胶囊相变储能石膏基建筑材料制备及性能研究[J].太阳能学报,2012,33(12):2140-2144.[15]Shang Jianli,Li Qiaoming,Wang Zhengjun.Preparation and thermal performance tests of microencapsulated gypsum-based phase change building material[J].Acta Energiae Solaris Sinica,2012,33(12):2140-2144.
[2]Huynh C K.Building energy saving techniques and indoor air quality:A dilemma[J].International Journal of Ventilation,2010,9(1):93-98.
[3]Zhu N,Ma Z J,Wang S W.Dynamic characteristics and energy performance of buildings using phase change materials:A review[J].Energy Conversion and Management,2009,50(12):3169-3181.
[4]Sharma A,Tyagi V V,Chen C R,et al.Review on thermal energy storage with phase change materials and applications[J].Renewable and Sustainable Energy Reviews,2009,13(2):318-345.
[5]Baker J.New technology and possible advances in energy storage[J].Energy Policy,2008,36(12):4368-4373.
[6]Pacheco R,Ordó?ez J,Martínez G.Energy efficient design of building:A review[J].Renewable and Sustainable Energy Reviews,2012,16(6):3559-3573.
[7]Park S K,Kim J H J,Nam J W,et al.Development of anti-fungal mortar and concrete using zeolite and zeocarbon microcapsules[J].Cement&Concrete Composites,2009,31(7):447-453.
[8]Borreguero A M,Carmona M,Sanchez M L,et al.Improvement of the thermal behaviour of gypsum blocks by the incorporation of microcapsules containing PCMSobtained by suspension polymerization with an optimal core/coating mass ratio[J].Applied Thermal Engineering,2010,30(10):1164-1169.
[9]尚建丽,张浩,董莉,等.双壳微纳米相变胶囊制备影响因素的研究[J].材料研究学报,2015,29(2):135-142.[9]Shang Jianli,Zhang Hao,Dong Li,et al.Study of influential factors in double-shell phase change micronano capsules preparation[J].Chinese Journal of Materials Research,2015,29(2):135-142.
[10]Lee S H,Yoon S J,Kim Y G,et al.The utilization of micro-encapsulated phase change material wallboards for energy saving[J].Korean Journal of Chemical Engineering,2011,28(11):2206-2210.
[11]Dale P,Randy T.Potential applications of phase change materials in concrete technology[J].Cement&Concrete Composites,2007,29(7):527-532.
[12]张秋香,陈建华,陆洪彬,等.细粒径石蜡微胶囊相变材料的制备与性能[J].高等学校化学学报,2014,35(10):2258-2264.[12]Zhang Qiuxiang,Chen Jianhua,Lu Hongbin,et al.Preparation and properties of paraffin microencapsulated phase-change materials with fine particle size[J].Chemical Journal of Chinese Universities,2014,35(10):2258-2264.
[13]张秋香,陈建华,陆洪彬,等.纳米二氧化硅改性石蜡微胶囊相变储能材料的研究[J].高分子学报,2015,(6):692-698.[13]Zhang Qiuxiang,Chen Jianhua,Lu Hongbin,et al.Studies on nanosilica modified paraffin microcapsule phase change energy storage materials[J].Acta Polymerica Sinica,2015,(6):692-698.
[14]尚建丽,王思,董莉.PAR/POL/SOD复合微胶囊的制备及热湿性能研究[J].功能材料,2013,44(8):1141-1144.[14]Shang Jianli,Wang Si,Dong Li.Prepared of PAR/POL/SOD-composite-wall microencapsulated and research of energy storage and humidity-control performance[J].Journal of Functional Materials,2013,44(8):1141-1144.
[15]尚建丽,李乔明,王争军.微胶囊相变储能石膏基建筑材料制备及性能研究[J].太阳能学报,2012,33(12):2140-2144.[15]Shang Jianli,Li Qiaoming,Wang Zhengjun.Preparation and thermal performance tests of microencapsulated gypsum-based phase change building material[J].Acta Energiae Solaris Sinica,2012,33(12):2140-2144.