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Over the past decades,the urgent need for high strength conductive hydrogels in diverse applications has motivated an unremitting effort to combine the improved mechanical properties of hydrogels with conductive performances.In this work,high strength conductive hydrogels intensified with intermolecular hydrogen bonding are fabricated by in situ mixing poly(2-vinyl-4,6-diamino-1,3,5-triazine-co-polyethylene glycol diacrylates) (PVDT-PEGDA) hydrogels with poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT/PSS).The conductive hydrogels in deionized water exhibit high mechanical performances with compressive strength and tensile strength in the range of 7.58-9.52 MPa and 0.48-1.20 MPa respectively,which are ascribed to the intermolecular hydrogen bonding interactions of diaminotriazinediaminotriazine (DAT-DAT) in the network.Meanwhile,adding PEDOT/PSS can significantly increase both the specific conductivities and equilibrium water contents of the hydrogels.These cytocompatible conductive hydrogels may have a great potential to be used as electrical stimuli responsive soft biomaterials. 相似文献
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使用移轴维氏曲线和双三次方曲线作为收缩段线型分别设计了两种环形
HYLTE主喷管,给出了环形HYLTE喷管三维的多组分有反应湍流场的控制方程、边界条件和
模拟区域的选择. 计算结果表明,这两种线型的喷管均能避免边界层的分离,获得均匀的流
场分布及相同的出口马赫数分布,但移轴维氏曲线在收缩段前部收缩快速,气流速度相应较
快,因此F原子的气相复合程度弱于另外一种收缩段设计的喷管,相应地,使用移轴维氏曲
线设计的喷管F原子流量比另外一种喷管高5%左右,
因此使用移轴维氏曲线作为环形HYLTE主喷管收缩段的设计有助于提高化学激光器的效率. 相似文献
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基于现有的文氏咀流量供给管道,提取出轴对称2维计算模型,计算了不同背压下文氏咀及下游管道的流场特性。计算结果显示,随着背压的升高,激波在管道内经历了3种状态,在直管道内为斜激波,到转接段时为拟正激波,进入文氏咀后则为正激波。在进行文氏咀流量计的设计时,应尽量将正激波控制在文氏咀喉道或向下游延伸的一小段距离内,此时是文氏咀的最佳工作状态。另外,采用壁面开孔法在文氏咀下游选取测压点时,为了准确测量截面上的静压,应将测压点选取在距离直管道入口数倍管径处,一般不低于8倍管径。 相似文献
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