PET/纳米SiO2复合材料发泡行为和光学性能
Foaming behavior of PET/nano SiO2 composites and its optical property
邵玮玮 1庞永艳 2严铭 1刘啸凤 3郑文革2
作者信息
- 1. 沈阳化工大学材料科学与工程学院,沈阳 110142;中国科学院宁波材料技术与工程研究所高分子与复合材料实验室,浙江宁波 315201
- 2. 中国科学院宁波材料技术与工程研究所高分子与复合材料实验室,浙江宁波 315201
- 3. 沈阳化工大学材料科学与工程学院,沈阳 110142
- 折叠
摘要
为研究纳米二氧化硅(SiO2)和基体黏度对聚对苯二甲酸乙二酯(PET)复合材料发泡行为和光学性能的影响,选择两种不同黏度的PET为基体(PET2比PET1黏度高),与不同质量分数的SiO2复合制备PET/SiO2复合材料,然后利用CO2釜压发泡制备PET/SiO2复合发泡材料.首先,利用扫描电子显微镜(SEM)研究了SiO2和基体黏度对PET/SiO2复合发泡材料泡孔结构的影响;其次,研究了SiO2和基体黏度对PET/SiO2复合材料发泡温度窗口的影响;最后,研究了SiO2和基体黏度对PET/SiO2复合发泡材料光反射性能的影响.结果显示,随着SiO2含量增加,PET/SiO2发泡材料泡孔尺寸变小,泡孔密度变大.相较于PET1/SiO2体系,PET2/SiO2体系的泡孔尺寸更小,泡孔密度更大.随着SiO2含量增加,PET/SiO2体系发泡温度上限先升高后降低,发泡温度窗口呈现出先变宽后变窄的趋势,PET2/SiO2体系具有更高的适合发泡的上限和下限温度.随着SiO2添加量提高,PET/SiO2发泡材料表现出逐渐升高的光反射率,PET2/SiO2体系的光反射率更高.
Abstract
To study the effect of nano silica(SiO2)and matrix viscosity on the foaming behavior and optical property of poly(ethylene terephthalate)(PET)composites,two kinds of PET of different viscosity(PET2 with higher viscosity than PET1)were chosen to mix with SiO2 of various loading contents to prepare PET/SiO2 composites,and then PET/SiO2 composite foams were prepared via batch foaming process with CO2 as foaming agent.First,the effect of SiO2 and matrix viscosity on cell structure of PET/SiO2 composite foams was studied using scanning electron microscope.Then,the effect of SiO2 and matrix viscosity on foaming temperature window of PET/SiO2 composites was studied.Last,the effect of SiO2 and matrix viscosity on light reflectivity of PET/SiO2 composite foams was studied.The results show that with increase in SiO2 content,the cell size of PET/SiO2 foams decreases,the cell density increases.Compared to PET1/SiO2 systems,PET2/SiO2 foams show smaller cell size and larger cell density.With increase in SiO2 content,the upper limit of foaming temperature of PET/SiO2 composites first increases and then decreases,and the foaming temperature window shows the changing trend of a first widening and then a narrowing.PET2/SiO2 composites show both higher upper limit and lower limit of foaming temperature.With increase in SiO2 content,PET/SiO2 foams display a gradual increase in light reflectivity.The PET2/SiO2 foams show higher light reflectivity.
关键词
聚对苯二甲酸乙二酯/纳米二氧化硅/黏度/泡孔结构/发泡窗口/光反射率Key words
poly(ethylene terephthalate)/nano silica/viscosity/cell structure/foaming window/light reflectivity引用本文复制引用
基金项目
国家自然科学基金面上项目(52273047)
出版年
2024
NETL
NSTL
万方数据