The invention relates to a trumpet-shaped electrospun nozzle with a differential rectangular blade at the top, belonging to the technical field of nanofiber preparation, which is composed of a cylindrical tube, a trumpet mouth and a differential rectangular blade. Differential rectangular blades distribute evenly along the circumference at the top of the large mouth of the horn. The horn mouth is located at the upper or lower part of the cylindrical tube. The inner diameter of the small mouth of the horn mouth is equal to that of the cylindrical tube, and the connection is tight and smooth. The barrier-free transport of the spinning fluid can be realized. The trumpet-shaped electrospinning nozzle with a differential rectangular blade at the top has a large inner diameter, is beneficial to avoiding the problem of needle blockage, and can be used for electrospinning high concentration spinning solution; the differential rectangular blade at the top of the trumpet-shaped spinning nozzle has the function of stabilizing droplets, and enlarges the spinning liquid surface area, and can produce multiple spinning jets. The tubular structure can realize closed and controllable liquid supply, and the solvent is not easy to volatilize. The differential rectangular blade on the top of the horn has tip, which can produce higher field strength and reduce energy consumption.
【技术实现步骤摘要】
一种顶部为微分矩形叶片的喇叭状电纺喷嘴
本专利技术涉及一种电纺喷嘴,特别是一种顶部为微分矩形叶片的喇叭状电纺喷嘴,属于纳米纤维制备
技术介绍
静电纺丝是通过高压直流电源产生的电场力拉伸聚合物溶液或熔体来制备纳米纤维的方法,是目前制备纳米纤维的最有效技术之一。溶液静电纺丝装置可以采用单个金属毛细针管作为纺丝头实现纺丝,如专利200420020596.3、200410025622.6等所公开的技术。但是,由于传统单个金属毛细针管静电纺丝产率较低,无法满足工业化需求,成为制约其发展的瓶颈问题,因此,Theron等将多个金属毛细针管按照直线排列或矩形排列的方式组成多针头静电纺丝装置[S.A.THERON,A.L.YARIN,E.ZUSSMAN,E.KROLL.Multiplejetsinelectrospinning:experimentandmodeling.Polymer,2005,46(9):2889-2899.],国内及国际上也出现了很多类似专利,如200420107832.5、201510278266.7、WO2007035011等所公开的技术。多针头静电纺丝技术喷丝位置可控、喂液量可控、喷丝过程稳定,在产量上相比于单针头静电纺丝有了大幅提高,但是由于各针头之间存在库仑斥力,造成中间场强小、两端场强大并且两侧针头的纺丝射流向外侧偏移的Endeffect(边缘效应)现象,导致纤维网从中间到两边厚度不匀等问题,另外,传统金属毛细针管内径小,针头易堵塞,且不方便清洗,这从根本上阻碍了多针头静电纺丝工业化的进程。随后,研究人员提出了大量无针头静电纺丝的 ...
【技术保护点】
1.一种顶部为微分矩形叶片的喇叭状电纺喷嘴,由圆柱管、喇叭口和微分矩形叶片组成,所述微分矩形叶片沿圆周均匀分布于所述喇叭口的大口顶部,所述喇叭口位于所述圆柱管的上部或下部,所述喇叭口的小口与所述圆柱管连接处的内径相等且连接紧密、顺畅,可实现纺丝流体的无障碍输运。
【技术特征摘要】
1.一种顶部为微分矩形叶片的喇叭状电纺喷嘴,由圆柱管、喇叭口和微分矩形叶片组成,所述微分矩形叶片沿圆周均匀分布于所述喇叭口的大口顶部,所述喇叭口位于所述圆柱管的上部或下部,所述喇叭口的小口与所述圆柱管连接处的内径相等且连接紧密、顺畅,可实现纺丝流体的无障碍输运。2.根据权利要求1所述的顶部为微分矩形叶片的喇叭状电纺喷嘴,其特征在于:所述微分矩形叶片的数量为大于等于2的正整数。3.根据权利要求1-2所述的顶部为微分矩形叶片的喇叭状电纺喷嘴,其特征在于:所述微分矩形叶片的厚度为0.1~10mm(包括0.1mm和10mm)。4.根据权利要求1-3所述的顶部为微分矩形叶片的喇叭状电纺喷嘴,其特征在于:所述微分矩形叶片沿长度方向呈平面形或曲面形,且沿长度方向的展开长度为1~50mm(包括1mm和50mm)。5.根据权利要求1-4所述的顶部为微分矩形叶片的喇叭状电纺喷嘴,其特征在于:所述微分矩形叶片均向外侧张开成一定角度,与竖直方向的夹角范围为0°~90°(包括0°和90°...
【专利技术属性】
技术研发人员:刘延波,任倩,刘健,
申请(专利权)人:武汉纺织大学,
类型:发明
国别省市:湖北,42
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