梁议心,王心超,刘佳佳,等.中空玻璃微球/TPU复合泡沫的制备及微孔结构的研究[J].精密成形工程,2024,16(6):24-33.
LIANG Yixin,WANG Xinchao,LIU Jiajia,et al.Preparation of Hollow Glass Microsphere/TPU Composite Foam and Its Microporous Structure[J].Journal of Netshape Forming Engineering,2024,16(6):24-33. |
| 中空玻璃微球/TPU复合泡沫的制备及微孔结构的研究 |
| Preparation of Hollow Glass Microsphere/TPU Composite Foam and Its Microporous Structure |
| 投稿时间：2024-05-10 |
| DOI：10.3969/j.issn.1674-6457.2024.06.003 |
| 中文关键词: 中空玻璃微球(GB) 热塑性聚氨酯(TPU) 泡孔 复合材料 微孔结构 |
| 英文关键词: hollow glass microspheres (GB) thermoplastic polyurethane (TPU) bubble hole composite microporous structure |
| 基金项目:河南省教育厅自然科学技术重点研究项目(24A460005);河南省自然科学基金面上项目(222300420428) |
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| 中文摘要: |
| 目的 探讨GB含量变化对中空玻璃微球/TPU复合材料相变行为、流变性能及热力学性能的影响，并研究微米尺寸填料GB对泡沫微孔形态、尺寸分布的影响。方法 以中空玻璃微球和热塑性聚氨酯为原料，采用微孔注塑成型(MIM)发泡方式，制备GB/TPU复合泡沫材料。结果 通过向TPU中引入微米玻璃球相改善发泡材料的微孔结构，在TPU中加入有机改性的GB，GB作为成核剂能显著提高TPU发泡材料的微孔结构。当GB质量分数为0.5%时，TPU熔体黏度得到提高，发泡性能得到改善，成功制备出具有复孔结构的GB/TPU复合泡沫。GB/TPU复合泡沫的密度被降低至0.51 g/cm3。由于微米尺寸填料GB的平均直径为18 μm，与TPU熔体形成较大的相界面，因此引起泡孔尺寸较大且泡孔开孔率较高的现象。结论 差示扫描量热仪(DSC)测试结果表明，在冷却阶段及第二次加热熔融阶段，GB对TPU软段相和硬段相的相变行为没有明显的影响。但是在DSC第一次加热熔融阶段，GB引起了TPU熔融峰向低温区移动。旋转流变仪测试分析结果表明，在高剪切频率下，GB/TPU复合材料的复合黏度和储能模量明显高于TPU纯料的，且TPUGB0.5(含质量分数为0.5%的GB)的复合黏度和储能模量最大。TGA结果显示，热稳定性提高，利用扫描电子显微镜(SEM)观察复合材料泡沫材料泡孔结构可知，泡孔分布和尺寸均匀性显著提高。 |
| 英文摘要: |
| The work aims to discuss the influence of GB content change on the phase change behavior, rheological properties and thermodynamic properties of hollow glass microsphere/TPU composites, and study the influence of micron size filler GB on the morphology and size distribution of foam micropores. GB/TPU composite foam material was prepared by microporous injection molding (MIM) foaming with insulating glass microsphere and thermoplastic polyurethane as raw materials. The microporous structure of the foaming material was improved by introducing a micrometer glass sphere phase into the TPU, and organic modified GB was added to the TPU. GB as a nucleator can significantly improve the microporous structure of the TPU foaming material. When the GB mass fraction was 0.5%, the TPU melt viscosity was improved, the foam performance was improved, and the GB/TPU composite foam with complex pore structure was successfully prepared. The density of the GB/TPU composite foam was reduced to 0.51 g/cm3. Because the average diameter of micron size filler GB was 18 μm, it formed a large phase interface with TPU melt, which caused the large hole size and high opening rate of bubbles. The results of the differential scanning calorimeter (DSC) show that GB has no obvious effect on the TPU soft and hard phase in the cooling phase and the second heating melting phase. However, in the first melting stage of DSC heating, GB causes the TPU melting temperature to move to the low temperature zone. The test analysis results of rotating rheometer show that at high shear frequency, the composite viscosity and energy storage modulus of GB/TPU composites are significantly higher than that of TPU pure material, and the composite viscosity and energy storage modulus of TPUGB0.5 (including GB with 0.5%) are the largest. TGA results show that the thermal stability is improved. The observation of bubble hole structure of the composite foam material with a scanning electron microscope (SEM) indicates that the distribution and size uniformity of the bubble hole are significantly improved. |
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