摘要
鉴于电活性聚合材料PVC凝胶具有驱动电压低、且具有弯曲和拉压变形的双重能力,有望满足软体机器人个性化与结构复杂设计需求,将直写打印技术与材料的成型制备方法结合起来,研究了PVC凝胶的打印工艺。首先,配置了不同浓度的打印墨水,测试了不同浓度打印墨水的流变性能用以表征其可打印性,结果表明配置的PVC凝胶打印墨水整体表现为剪切变稀性质,具有较强的可打印性,其中质量比为聚氯乙烯(PVC)∶己二酸丁二酯(DBA)∶四氢呋喃(THF)=1∶4∶12.5的溶液用于打印具有固化速度快,易于挤出的特点。然后,通过单点成线试验,发现打印参数为:挤出流量为0.02m L/min,扫描速度为36 mm/s时,成线精度可以达到0.15 mm。在此基础上,进行三维叠加打印试验,实现了波纹状、网状、鱼鳞状PVC凝胶结构的3D打印。采用3层鱼鳞状PVC凝胶结构做成叠层,给该结构施加700 V方波电压时,其上下振动位移达到0.21mm;施加900V方波电压时,其驱动力为1.18N,为自身重量的21倍。试验结果表明:直写打印制备出来的PVC凝胶材料驱动性能良好,表明打印工艺的可行性。
Electroactive polymer polyvinyl chloride(PVC)gel can be applied to soft robots with the complex and individualized structures and it has the dual ability of bending and drawing deformation under low voltage.The printing process of PVC gel is explored by combining the direct writing technology with the preparation method of the material.The printing inks with different concentrations are arranged and the rheological and printability properties of the inks are measured.The PVC printing inks are characterized by shear thinning property.A ink with a mass ratio of PVC:DBA:Thf=1:4:12.5 is used for printing with fast curing speed and easy to be extruded.Through a single line test,the parameters of the printer are as follows:when the extrusion flow rate is 0.02 mL/min and the scanning speed is 36 mm/s,the single point line precision could reach 0.15 mm.Corrugated and fish scale PVC gel structures have been realized by this technology.Fish scale PVC gel structure is used to make into a stack structure.The 700 V square wave voltage is applied to the structure,the upper and lower vibration displacement reached 0.21 mm,and the driving force is 1.18 N under 900 V square wave voltage,which is 21 times of its own weight.The experimental results show that the PVC gel material prepared by the printing process has a good driving performance and the printing process is feasible.
作者
罗斌
陈花玲
徐雪杰
汝杰
朱子才
LUO Bin;CHEN Hualing;XU Xuejie;RU Jie;ZHU Zicai(School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049;State Key Laboratory of Mechanical Structural Strength and Vibration,Xi'an Jiaotong University,Xi'an 710049)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2019年第11期76-82,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(91648110)
关键词
直写打印
电活性聚合材料
PVC凝胶
打印墨水
驱动性能
direct writing technology
electroactive polymer materials
polyvinyl chloride ge1
printing inks
driving performance
