<br>纳米CaCO3/稻壳纤维/聚丙烯三相热塑性微孔发泡复合材料性能及泡孔结构研究,Polymer Composites

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纳米CaCO3/稻壳纤维/聚丙烯三相热塑性微孔发泡复合材料性能及泡孔结构研究
Polymer Composites ( IF 4.8 ) Pub Date : 2024-05-23 , DOI: 10.1002/pc.28581
Yonghua Cai _{1,

2,

3,

4} , Lian Liu _{1,

2,

3,

4} , Wei Guo _{1,

2,

3,

4} , Feng Zhao _{1,

2,

3,

4} , Xiaorui Liu _{1,

5} , Jialong Zhao _{1,

2,

3,

4} , Tao Feng _{1,

2,

3,

4}

Affiliation

微孔发泡植物纤维复合材料具有密度低、成本低、可生物降解等优点，在行业中具有巨大的发展潜力。然而，细胞结构的存在降低了植物纤维复合材料的机械性能。为了克服这一问题，本研究采用纳米CaCO ₃增强微孔发泡植物纤维复合材料，并制备了由纳米CaCO ₃ 、稻壳纤维和聚丙烯（PP）组成的三相热塑性复合材料，采用化学发泡注射成型技术制造。该研究分析了纳米CaCO ₃浓度如何影响复合材料的熔体粘度、结晶特性、机械性能和细胞结构。结果表明，随着纳米CaCO ₃含量的增加，微孔发泡三相热塑性复合材料的机械性能先增强后减弱，并在2 wt%纳米CaCO ₃含量时获得最佳值。通过观察微孔发泡三相热塑性复合材料在垂直和平行熔体流动方向上的泡孔，发现纳米CaCO ₃含量为2 wt%的三相热塑性复合材料具有最佳的泡孔结构。

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Research on properties and cellular structure of nano-CaCO3/rice-husk fiber/polypropylene three-phase thermoplastic microcellular foaming composites

Microcellular foamed plant fiber composites have the advantages of low density, low cost, and biodegradability, so it has great development potential in the industry. Nevertheless, the existence of cellular structures diminishes the mechanical performance of plant fiber composites. To overcome this problem, in this study, nano-CaCO₃ was used to enhance the microcellular foamed plant fiber composites, and the three-phase thermoplastic composites, comprised of nano-CaCO₃, rice-husk fiber, and polypropylene (PP), were fabricated using a chemical foaming injection molding technique. The study analyzed how the nano-CaCO₃ concentration affected the melt viscosity, crystallization characteristics, mechanical properties, and cellular structure of the composites. According to the findings, the mechanical characteristics of microcellular foamed three-phase thermoplastic composites were enhanced initially and subsequently diminished as the nano-CaCO₃ content was augmented, and obtained optimal value at 2 wt% nano-CaCO₃ content. By observing the cells of microcellular foamed three-phase thermoplastic composites in vertical and parallel melt flow directions, it was found that the nano-CaCO₃ content of 2 wt% three-phase thermoplastic composite had the best cellular structure.

更新日期：2024-05-23

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