| 3D成型SiO_2/PVA水凝胶支架的摩擦行为 |
| |
| 引用本文： | 李坚,李学锋,龙世军,李晗,黄大华. 3D成型SiO_2/PVA水凝胶支架的摩擦行为[J]. 复合材料学报, 2016, 33(11): 2412-2418. DOI: 10.13801/j.cnki.fhclxb.20160126.002 |
| |
| 作者姓名： | 李坚 李学锋 龙世军 李晗 黄大华 |
| |
| 作者单位： | 1. 湖北工业大学 材料科学与工程学院, 武汉 430068;2. 湖北工业大学 绿色轻质材料与加工协同创新中心, 武汉 430068;3. 湖北工业大学 绿色轻工材料湖北省重点实验室, 武汉 430068 |
| |
| 基金项目： | 国家自然科学基金(51273059)，清华大学摩擦学国家重点实验室开放基金(SKLTKF 14A09) |
| |
| 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SiO_2/聚乙烯醇(PVA)水凝胶支架,研究了SiO_2/PVA水凝胶支架的重复摩擦行为,分析了SiO_2/PVA水凝胶支架的摩擦原理。结果表明:SiO_2/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,SiO_2/PVA水凝胶支架摩擦力稍高于块体SiO_2/PVA水凝胶,且随孔隙率的提高而稍有降低;而高摩擦速率(10-2~1m/s)下,SiO_2/PVA水凝胶支架和块体SiO_2/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(0.3kPa)下,SiO_2/PVA水凝胶支架重复摩擦性优于块体SiO_2/PVA水凝胶,这与支架结构能保持稳定的水润滑层相关。
|
| 关 键 词： | 聚乙烯醇 水凝胶 支架 3D成型 摩擦 |
| 收稿时间： | 2015-11-04 |
Friction behavior of 3D printing SiO2/PVA hydrogel scaffold |
| |
| LI Jian,LI Xuefeng,LONG Shijun,LI Han,HUANG Dahua. Friction behavior of 3D printing SiO2/PVA hydrogel scaffold[J]. Acta Materiae Compositae Sinica, 2016, 33(11): 2412-2418. DOI: 10.13801/j.cnki.fhclxb.20160126.002 |
| |
| Authors: | LI Jian LI Xuefeng LONG Shijun LI Han HUANG Dahua |
| |
| Affiliation: | 1. School of Materials Science and Engineering, Hubei University of Technology, Wuhan 430068, China;2. Collaborative Innovation Center of Green Light-weight Materials and Processing, Hubei University of Technology, Wuhan 430068, China;3. Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China |
| |
| 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 |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《复合材料学报》浏览原始摘要信息 |
|
点击此处可从《复合材料学报》下载免费的PDF全文 |
|
