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以定量滤纸为生物模板制备了具有定量滤纸形貌的Na2CO3晶体,经过低温下的吸水和结晶过程合成了相变材料Na2CO3·7H2O。并借助扫描电子显微镜(SEM)、X-射线粉末衍射仪(XRD)和差示扫描量热仪(DSC)对产物的形貌、晶型以及热学性质进行了表征。同时,考察了掺杂NaCl对合成的相变材料Na2CO3·7H2O的热学性能的影响。结果表明:产物纯度高,且很好地遗传了模板(滤纸)的形貌;Na2CO3.7H2O表现出了良好的储能效果,相变热可达216.8J/g;掺杂NaCl(20mol%)可使Na2CO3.7H2O的相变温度降低5.5℃,而相变热仍然高达177.9J/g。
The quantitative filter paper was used as biological template to prepare Na2CO3 crystal with quantitative filter paper morphology. The phase change material Na2CO3 · 7H2O was synthesized through the process of water absorption and crystallization at low temperature. The morphology, crystalline form and thermal properties of the product were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC). At the same time, the effects of NaCl on the thermal properties of the synthesized phase change material Na2CO3 · 7H2O were investigated. The results showed that the purity of the product was high, and the morphology of the template (filter paper) was well inherited. The Na2CO3.7H2O showed a good energy storage effect with a phase transition temperature of 216.8 J / g and the doped NaCl (20 mol% The phase transition temperature of Na2CO3.7H2O can be reduced by 5.5 ℃, while the phase transition heat is still as high as 177.9J / g.