Friction behavior of 3D printing SiO2/PVA hydrogel scaffold
-
摘要: 利用3D成型技术，通过先成型后冷冻交联2步法制备不同孔隙率的SiO2/聚乙烯醇（PVA）水凝胶支架，研究了SiO2/PVA水凝胶支架的重复摩擦行为，分析了SiO2/PVA水凝胶支架的摩擦原理。结果表明：SiO2/PVA水凝胶支架能够保持三维贯通的立体结构，最大孔隙率可达42.3%。低摩擦速率（10-6~10-3 m/s）下，SiO2/PVA水凝胶支架摩擦力稍高于块体SiO2/PVA水凝胶，且随孔隙率的提高而稍有降低；而高摩擦速率（10-2~1 m/s）下，SiO2/PVA水凝胶支架和块体SiO2/PVA水凝胶的摩擦力相近，孔隙率对支架摩擦力影响不明显。低正压力载荷（0.3 kPa）下，SiO2/PVA水凝胶支架重复摩擦性优于块体SiO2/PVA水凝胶，这与支架结构能保持稳定的水润滑层相关。Abstract: SiO2/polyvinyl alcohol (PVA) hydrogel scaffold with different porosities was prepared by two-step method of pre forming and post freezing cross-linking using 3D printing technology. The reproducible friction behaviors of SiO2/PVA hydrogel scaffold was researched and the friction principle of SiO2/PVA hydrogel scaffold was analyzed. The results show that SiO2/PVA hydrogel scaffold can keep a three dimensional through structure with maximum porosity of 42.3%. At low friction velocity(10-6-10-3 m/s), the frictional force of SiO2/PVA hydrogel scaffold is slightly higher than that of bulk SiO2/PVA hydrogel and decreases slightly with the increase of porosity. At high friction velocity(10-2-1 m/s), the frictional force of SiO2/PVA hydrogel scaffold is equal to that of bulk SiO2/PVA hydrogel and the effect of porosity on the frictional force for scaffold is not obvious. At small normal pressure load(0.3 kPa), SiO2/PVA hydrogel scaffold shows better reproducible friction property than bulk SiO2/PVA hydrogel. It is related to the structure of the scaffold which can keep a stable hydrated lubrication layer.
-
Keywords:
- polyvinyl alcohol /
- hydrogel /
- scaffold /
- 3D printing /
- friction
-
-
期刊类型引用(2)
1. 柯俊，李志虎，秦玉林. 金属主簧-复合材料副簧复合刚度计算模型. 汽车实用技术. 2021(05): 39-43 . 
百度学术
2. 曾婷，王咏莉，尹忠旺，苏婷慧，师志峰，饶猛. 端面凸轮下压机构支承轴承冲击失效分析及优化（英文）. 机床与液压. 2017(24): 37-42 . 百度学术
其他类型引用(5)
-
计量
- 文章访问数:
- HTML全文浏览量:
- PDF下载量:
- 被引次数: 7
下载:
