Model derivation and validation for 2D polymeric nanonets: Origin, evolution, and regulation

Model derivation and validation for 2D polymeric nanonets: Origin, evolution, and regulation
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二维聚合物纳米网的模型推导和验证:起源、演化和调控

DOI:
10.1016/j.polymer.2015.08.002
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发表时间:
2015-09
期刊:
影响因子:
4.6
通讯作者:
丁彬
丁彬
中科院分区:
化学2区
文献类型:
--
作者:
Shichao Zhang;Kun Chen;Jianyong Yu;丁彬

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能够在静电纺丝/结网期间定量阐述新型二维(2D)纳米网形成的数值模型将对从传感设备和个人保护到工业过滤和分离的领域具有广泛的技术意义;然而,创建这样的模型已被证明极具挑战性。在这里,我们报告了新的数值模型,通过结合泰勒锥顶点的喷射模式和带电液滴的相分离来澄清纳米网的起源,演化和调节。我们的模型提出了两个临界条件公式产生的射流和液滴,并结合浓度扫描路径的纳米网或无孔膜的LCST相图。通过改变溶液性质和工艺参数,得到的模型预测与实验结果吻合良好。纳米网形成的成功模型推导可以为各种应用的2D多功能纳米材料的设计和开发提供新的见解。
Numerical models that are capable to quantitatively elaborate the formation of novel two-dimensional (2D) nanonets during electrospinning/netting would have broad technological implications for areas ranging from sensing devices and individual protection to industrial filtration and separation; however, creating such models has proved extremely challenging. Here we report novel numerical models for clarifying the origin, evolution, and regulation of the nanonets via combining the ejection modes of Taylor cone apex and the phase separation of charged droplets. Our models propose two critical condition formulas for the generation of jets and droplets, and a LCST phase diagram combined with concentration sweep paths for the nanonets or non-porous films. The resulting model predications exhibit excellent agreement with the experimental results obtained via varying the solution properties and process parameters. The successful model derivation for the nanonets formation may provide new insights into the design and development of 2D multifunctional nanomaterials for various applications.
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