Facile Synthesis of Isotactic Polyacrylonitrile via Template Polymerization in Interlayer Space for Dielectric Energy Storage
Facile Synthesis of Isotactic Polyacrylonitrile via Template Polymerization in Interlayer Space for Dielectric Energy Storage
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DOI：
10.1021/acsapm.9b01074
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发表时间：
2020-01
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通讯作者：
Yu Wang;R. Nakamura;Takeo Suga;Shengtao Li;Y. Ohki;H. Nishide;K. Oyaizu
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作者：
Yu Wang;R. Nakamura;Takeo Suga;Shengtao Li;Y. Ohki;H. Nishide;K. Oyaizu
以CoCl2晶体的二维层状空间为模板，采用模板聚合法制备了等规聚丙烯腈（iso-PAN）。聚丙烯腈的等规性达到了中/中三尺度= 93% (mm = 0.93)，表明聚合物链具有良好的填充性，从而具有较高的击穿强度。弹性增强与模板层状晶体的原子间（金属-金属）距离有关。由于丁基的偶极矩大（4.3 D）和高立体规则性，iso-PAN在660 MV/m时具有6.7 J/cm3的高放电能量密度，几乎是无规聚丙烯腈（ata-PAN）和双轴取向聚丙烯（BOPP）（一种商用电介质聚合物薄膜）的6倍。此外，在较宽的外加电场范围内，它的充放电效率约为90%，高于data - pan和BOPP的效率。这些结果表明，isopan具有大的偶极矩和高的立体规则性，是一种有利的材料。
Isotactic polyacrylonitrile (iso-PAN) is synthesized via template polymerization using the two-dimensional layered space of a CoCl2 crystal as a template. Isotacticity of polyacrylonitrile reaches a meso/meso triad = 93% (mm = 0.93), which indicates a superior packing of polymer chains, leading to a high breakdown strength. Tacticity enhancement is correlated with the interatomic (metal–metal) distance of template-layered crystals. Due to a large dipole moment (4.3 D) of nitrile group and a high stereoregularity, iso-PAN demonstrates a high discharge energy density of 6.7 J/cm3 at 660 MV/m, nearly six times that of atactic polyacrylonitrile (ata-PAN) and biaxially oriented polypropylene (BOPP), a commercially available dielectric polymer film. Moreover, it exhibits a charge–discharge efficiency of ca. 90% in a wide applied electric field range, which is higher than the efficiencies of ata-PAN and BOPP. These results suggest that iso-PAN, exhibiting a large dipole moment and high stereoregularity, is a pro...