3D成型SiO<sub>2</sub>/PVA水凝胶支架的摩擦行为

李坚; 李学锋; 龙世军; 李晗; 黄大华

doi:10.13801/j.cnki.fhclxb.20160126.002

3D成型SiO₂/PVA水凝胶支架的摩擦行为

doi: 10.13801/j.cnki.fhclxb.20160126.002

李坚¹,
李学锋^2,3,,
龙世军^2,3,
李晗¹,
黄大华¹

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（SKLTKF14A09）

详细信息

通讯作者:
李学锋,博士,教授,研究方向为高分子功能材料、聚合物基复合材料。E-mail:li_xf@mail.hbut.edu.cn

中图分类号: TQ317.3;O631
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- 被引次数: 0
出版历程
- 收稿日期: 2015-11-04
- 修回日期: 2016-01-20
- 刊出日期: 2016-11-15

Friction behavior of 3D printing SiO₂/PVA hydrogel scaffold

LI Jian¹,
LI Xuefeng^{2,3
,},
LONG Shijun^2,3,
LI Han¹,
HUANG Dahua¹

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

摘要

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。
- 聚乙烯醇 /
- 水凝胶 /
- 支架 /
- 3D成型 /
- 摩擦
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.
- polyvinyl alcohol /
- hydrogel /
- scaffold /
- 3D printing /
- friction