文章摘要
王汀,丘晓琳,卢立新,周兵林.多孔凝胶基碳纳米定形相变材料的制备与表征[J].精细化工,2019,36(11):
多孔凝胶基碳纳米定形相变材料的制备与表征
Preparation and characterization of superporous hydrogel/carbon nano form-stable phase change materials
投稿时间:2019-03-21  修订日期:2019-06-05
DOI:
中文关键词: 超大多孔水凝胶;碳纳米材料;定形相变材料;热能储存  功能材料
英文关键词: superporous hydrogel  carbon nanomaterials  form-stable phase change materials  thermal energy storage  functional materials
基金项目:国家自然科学基金;中国博士后科学基金;江苏省博士后科学基金
作者单位E-mail
王汀 江南大学 494339906@qq.com 
丘晓琳 江南大学 xiaolinqiu2005@126.com 
卢立新 江南大学  
周兵林 江南大学  
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中文摘要:
      为提高定形相变材料(PCM)基材的负载能力,以丙烯酸和丙烯酰胺为单体,采用泡沫聚合法,通过优化工艺参数制备出超大多孔水凝胶(SPH);并以SPH为基材,水为PCM,碳纳米材料〔氧化石墨烯(GO)和碳纳米管(CNTs)〕为添加剂,制备了两种多孔凝胶基碳纳米定形PCM(GO-H2O/SPH和CNTs-H2O/SPH)。对SPH和定形PCM的性能进行了表征。结果表明,通过优化工艺制备的SPH内部孔径在100~500μm,负载PCM的质量分数最高达95.7%。相变潜热从纯PCM的352.3J/g下降到CNTs-H2O/SPH的337.1J/g,仅下降4.3%。但SPH的加入使PCM的导热系数降低42.1%。加入GO和CNTs可提高定形PCM的导热系数及吸收和释放热能的速率。当GO和CNTs质量分数为0.2%时,与不含碳纳米材料的定形PCM相比,导热系数分别提高了91.5%和86.0%。定形PCM有良好的热循环稳定性,可循环使用。
英文摘要:
      In order to improve the load capacity of the substrate in form-stable phase change materials (PCM), superporous hydrogels (SPH) were prepared by optimizing the process parameters by using a foam polymerization method using acrylic acid and acrylamide as monomers; and SPH was used as substrate, water was used as PCM and carbon nanomaterials〔graphene oxide (GO) and carbon nanotubes (CNTs)〕were used as additive to prepared two kinds of superporous hydrogel/carbon nano form-stable PCMs (GO-H2O/SPH and CNTs-H2O/SPH). The properties of SPH and form-stable PCMs were characterized. The results showed that the internal pore size of SPH prepared by the optimized process was 100~500μm, and the mass fraction to load PCM of it was up to 95.7%. The phase change enthalpy decreased from 352.3J/g of pure PCM to 337.1J/g of CNTs-H2O/SPH, which decreased by only 4.3%. However, the addition of SPH reduced the thermal conductivity of PCM by 42.1%. Adding GO and CNTs could increase the thermal conductivity and the rate of charging and discharging of form-stable PCMs. When the mass fraction of GO and CNTs was 0.2%, compared to the form-stable PCM without carbon nanomaterials, the thermal conductivity of form-stable PCMs was increased by 91.5% and 86.0% respectively. The form-stable PCMs also had good thermal cycle stability and could be recycled.
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