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Humidity-Driven Transparent Holographic Free-Standing Polyelectrolyte Films
ACS Applied Polymer Materials ( IF 5 ) Pub Date : 2020-01-17 , DOI: 10.1021/acsapm.9b01151
Konstantin G. Nikolaev 1 , Sviatlana A. Ulasevich 1 , Olga Luneva 1 , Olga Yu. Orlova 1 , Daria Vasileva 2 , Semen Vasilev 2, 3 , Alexander S. Novikov 4 , Ekaterina V. Skorb 1
Affiliation  

In the present work, transparent holographic poly(diallyldimethylammonium chloride) (PDADMAC)/heparin and PDADMAC/poly(styrenesulfonate) (PSS) films were synthesized via polyelectrolyte coacervates. PDADMAC/heparin films were obtained without temperature treatment. Thin holographic free-standing films with a 1 μm grating period and uniform surface of a polyelectrolyte complex were readily and quickly made by pressing polyelectrolyte coacervate, the hydrated viscoelastic fluid-like form of polyelectrolyte complex precursor, between a flat surface and holographic mask. Heparin replaces PSS in film composition to prepare the sheer film. Thus, the PDADMAC/heparin holographic film demonstrates transparency and reversible response for humidity under diffraction detection. In addition to diffraction humidity signal measurements, the cobalt(II) chloride was impregnated in polyelectrolyte coacervate to make an additional colorimetric signal response. In this case, the free-standing film serves both as the substrate for the hygroscopic salt and as a diffraction humidity sensor. The PDADMAC/heparin/Co(II) chloride film demonstrates a linear humidity range from 50 to 90%. Additionally, due to hydrated inorganic salt ion size, cobalt chloride prevents film porosity, which initiates under film swelling. Based on the results and calculations obtained, the study proposes the mechanism of water incorporation, including the reptation model and polyelectrolyte complex behavior. Results of density functional theory calculations prove that binding of cobalt aqua complexes [Co(H2O)6]2+ with the dimeric associates heparin/PDADMAC via noncovalent interactions (hydrogen bonds) additionally is much more energetically favorable compared with the alternative association of heparin/PDADMAC with water molecules.

中文翻译:

湿度驱动的透明全息自立式聚电解质薄膜

在目前的工作中,通过聚电解质凝聚层合成了透明的全息照相聚二烯丙基二甲基氯化铵(PDADMAC)/肝素和PDADMAC /聚苯乙烯磺酸盐(PSS)薄膜。未经处理而获得PDADMAC /肝素膜。通过在平坦表面和全息掩模之间压制聚电解质凝聚层(水合粘弹性流体状形式的聚电解质复合物前体),可以轻松快速地制得具有1μm光栅周期和均匀电解质复合表面的全息自支撑薄膜。肝素替代了膜成分中的PSS以制备透明膜。因此,PDADMAC /肝素全息膜在衍射检测下显示出对湿度的透明性和可逆响应。除了衍射湿度信号测量外,将氯化钴(II)浸入聚电解质凝聚层中,以产生额外的比色信号响应。在这种情况下,自支撑膜既用作吸湿盐的基材又用作衍射湿度传感器。PDADMAC /肝素/ Co(II)氯化物薄膜的线性湿度范围为50%至90%。另外,由于水合的无机盐离子的大小,氯化钴可防止膜的孔隙,该孔隙在膜溶胀下引发。根据所得结果和计算结果,研究提出了水结合的机理,包括渗析模型和聚电解质复合物行为。密度泛函理论计算的结果证明了钴水配合物[Co(H 自支撑膜既用作吸湿盐的基材,又用作衍射湿度传感器。PDADMAC /肝素/ Co(II)氯化物薄膜的线性湿度范围为50%至90%。另外,由于水合的无机盐离子的大小,氯化钴可防止膜的孔隙,该孔隙在膜溶胀下引发。根据所得结果和计算结果,研究提出了水结合的机理,包括渗析模型和聚电解质复合物行为。密度泛函理论计算的结果证明了钴水配合物[Co(H 自支撑膜既用作吸湿盐的基材,又用作衍射湿度传感器。PDADMAC /肝素/ Co(II)氯化物薄膜的线性湿度范围为50%至90%。另外,由于水合的无机盐离子的大小,氯化钴可防止膜的孔隙,该孔隙在膜溶胀下引发。根据所得结果和计算结果,研究提出了水结合的机理,包括渗析模型和聚电解质复合物行为。密度泛函理论计算的结果证明了钴水配合物[Co(H 由于水合无机盐离子的大小,氯化钴可防止膜的孔隙,该孔隙在膜膨胀下引发。根据所得结果和计算结果,研究提出了水结合的机理,包括渗析模型和聚电解质复合物行为。密度泛函理论计算的结果证明了钴水配合物[Co(H 由于水合无机盐离子的大小,氯化钴可防止膜的孔隙,该孔隙在膜膨胀下引发。根据所得结果和计算结果,研究提出了水结合的机理,包括渗析模型和聚电解质复合物行为。密度泛函理论计算的结果证明了钴水配合物[Co(H2 O)6 ] 2+与二聚体联营经由非共价相互作用(氢键)肝素/ PDADMAC另外更加积极有利的与肝素的替代关联/ PDADMAC与水分子相比较。
更新日期:2020-01-17
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