纳米TiO<sub>2</sub>改性环氧涂层对玻璃纤维/不饱和聚酯复合材料紫外-凝露老化特性的影响

方园; 赵华伟; 张冰洁; 张强先

doi:10.13801/j.cnki.fhclxb.20200826.002

纳米TiO₂改性环氧涂层对玻璃纤维/不饱和聚酯复合材料紫外-凝露老化特性的影响

doi: 10.13801/j.cnki.fhclxb.20200826.002

南京工业大学　土木工程学院，南京 211816

基金项目: 国家自然科学基金(51408304)

详细信息

通讯作者:
方园，博士，副研究员，硕士生导师，研究方向为复合材料结构劣化机理及性能提升　E-mail：yuanfang@njtech.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-22
- 录用日期: 2020-08-15
- 网络出版日期: 2020-08-26
- 刊出日期: 2021-05-01

Effect of nano TiO₂ modified epoxy coating on UV-condensation aging characteristics of glass fiber/unsaturated polyester composite

College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China

摘要

摘要: 通过紫外-凝露加速老化试验，考察了纳米TiO₂改性环氧涂层对玻璃纤维/不饱和聚酯复合材料各种性能的影响。研究了紫外-凝露环境中不同纳米TiO₂含量的纳米TiO₂改性环氧涂层的颜色及硬度变化。并研究了未涂覆涂层、涂覆环氧涂层及2wt%TiO₂改性环氧涂层的玻璃纤维/不饱和聚酯复合材料的颜色变化、质量变化、弯曲性能及剪切性能变化规律。发现紫外-凝露环境下老化90天后未涂覆涂层、涂覆环氧涂层及2wt% TiO₂改性环氧涂层玻璃纤维/不饱和聚酯复合材料弯曲强度分别下降了14.7%、10.0%和9.2%，弯曲模量分别下降了5.9%、5.4%和3.2%。考虑紫外、湿度、温度共同作用，对古尼耶夫剩余强度公式进行修正，预测了纳米 TiO₂改性环氧涂层玻璃纤维/不饱和聚酯复合材料的寿命。
- 树脂基复合材料 /
- 老化 /
- 机械性能 /
- 环氧涂层 /
- 寿命预测
Abstract: The effect of nano TiO₂ modified epoxy coating on the properties of glass fiber/unsaturated polyester composite was investigated by UV-condensation accelerated aging test. The change of color and hardness of epoxy coating modified by different content of nano TiO₂ in UV-condensation environment was studied. Moreover, the color change, mass change, flexural and shear properties of glass fiber/unsaturated polyester composite without coating, with epoxy coating and 2wt% TiO₂ modified epoxy coating were investigated. The results indicate that the flexural strength of the glass fiber/unsaturated polyester composites without coating, with epoxy coating and 2wt% TiO₂ modified epoxy coating decreases by 14.7%, 10.0%, and 9.2% respectively after aging for 90 days in UV-condensation environment; the flexural modulus decreases by 5.9%, 5.4%, and 3.2%, respectively. Considering the interaction of UV, humidity and temperature, Gunyaev’s residual strength formula was modified, and the life of the glass fiber/unsaturated polyester composites was predicted.
- polymer-matrix composite /
- aging /
- mechanical property /
- epoxy coating /
- life prediction

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图 1 紫外光耐气候试验箱

Figure 1. UV climate test chamber

下载: 全尺寸图片幻灯片

图 2 不同纳米TiO₂含量的纳米TiO₂/环氧涂层的玻璃纤维/不饱和聚酯复合材料表面在紫外-凝露环境中明度的变化曲线

Figure 2. Lightness variation of glass fiber/unsaturated polyester composites with nano TiO₂/epoxy coating with different contents of TiO₂ in UV-condensation environment

下载: 全尺寸图片幻灯片

图 3 不同TiO₂含量的纳米TiO₂/环氧涂层的玻璃纤维/不饱和聚酯复合材料表面在紫外-凝露环境中绿-红偏色范围的变化曲线

Figure 3. Green-red color range variation of glass fiber/unsaturated polyester composites with nano TiO₂/epoxy coating with different contents of TiO₂ in UV-condensation environment

下载: 全尺寸图片幻灯片

图 4 不同TiO₂含量的纳米TiO₂/环氧涂层的玻璃纤维/不饱和聚酯复合材料表面在紫外-凝露环境中蓝-黄偏色范围的变化曲线

Figure 4. Blue-yellow color range variation of glass fiber/unsaturated polyester composites with nano TiO₂/epoxy coating with different contents of TiO₂ in UV-condensation environment

下载: 全尺寸图片幻灯片

图 5 紫外-凝露环境下玻璃纤维/不饱和聚酯复合材料弯曲强度随老化时间的变化曲线

Figure 5. Curves of flexural strength of glass fiber/unsaturated polyester composites with aging time in UV-condensation environment

下载: 全尺寸图片幻灯片

图 6 紫外-凝露环境下玻璃纤维/不饱和聚酯复合材料弯曲模量随老化时间的变化曲线

Figure 6. Curves of flexural modulus of glass fiber/unsaturated polyester composites with aging time in UV-condensation environment

下载: 全尺寸图片幻灯片

图 7 紫外-凝露环境下玻璃纤维/不饱和聚酯复合材料剪切强度随老化时间的变化曲线

Figure 7. Curves of shear strength of glass fiber/unsaturated polyester composites with aging time in UV-condensation environment

下载: 全尺寸图片幻灯片

图 8 紫外-凝露环境下未涂覆(a)、涂覆环氧涂层(b)、涂覆2wt% TiO₂/环氧涂层(c)的玻璃纤维/不饱和聚酯复合材料弯曲强度剩余率拟合结果

Figure 8. Fitting results of residual ration of flexural strength of glass fiber/unsaturated polyester composites with uncoated (a), coated epoxy coating (b), and coated 2wt% TiO₂/epoxy coating (c) in UV-condensation environment

下载: 全尺寸图片幻灯片

图 9 紫外-凝露环境下玻璃纤维/不饱和聚酯复合材料弯曲强度预测曲线

Figure 9. Prediction curves of flexural strength of glass fiber/unsaturated polyester composites in UV-condensation environment

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表 1 不同TiO₂含量对环氧涂层硬度的影响

Table 1. Effect of different TiO₂ contents on hardness of epoxy coating

Content of
TiO₂/wt% Hardness grade
0 d 90 d

0 2H 3B
1 3H 3B
2 4H 2B
3 4H 2B
5 4H 3B

下载: 导出CSV

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