| 摘要: |
| 以玻化微珠、水泥、粉煤灰、PP纤维和碳纳米管为主要原料制备复合保温材料.利用扫描电镜（SEM）和Nicolet傅里叶变换红外光谱仪（IR）对PP纤维改性前后的表面形貌、试样断口形貌和纤维表面活性基团进行分析，研究了PP纤维改性前后对复合保温材料力学性能的影响.采用扫描电镜对复合保温材料断口形貌进行分析，研究了碳纳米管对复合保温材料强度和电磁屏蔽效能的影响.结果表明：改性PP纤维表面引入的活性基团-OH和-COOH使试样的抗折强度和抗压强度较掺加未改性PP纤维试样分别提高了2069%和1176%；掺加碳纳米管后，复合保温材料的抗折强度和抗压强度显著改善，电磁辐射频率在5～15GHz的电磁屏蔽效能显著提高. |
| 关键词: 复合保温材料 PP纤维 碳纳米管 力学性能 电磁屏蔽效能 |
| DOI：103969/j.issn1007 9629201601015 |
| 分类号: |
| 基金项目:山东省科技发展计划项目（SGG1205） |
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| Effect of Polypropylene Fibers and Carbon Nanotubes on Performance of Composite Thermal Insulation Materials |
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LI Jing, LI Guozhong, LI Xiaolong
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Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan, Jinan 250022, China
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| Abstract: |
| Glazed hollow beads, cement, fly ash, polypropylene（PP） fibers and carbon nanotubes were used to prepare composite thermal insulation materials.The surface microstructure of unmodified and modified PP fibers, the fracture profile of samples and the active functional group of PP fibers were analyzed by SEM and IR to study the effects of modified PP fibers on mechanical property of the composite thermal insulation materials. The SEM was adopted to analyze the fracture profile of composite thermal insulation materials, to study the effects of carbon nanotubes on strength and electromagnetic shielding effectiveness of the composite thermal insulation materials. The results show that active functional group —OH and—COOH are introduced into modified PP fibers. Compared to the samples mixed with unmodified PP fibers, the flexural and compressive strength of samples mixed with modified PP fibers increase by 2069% and 1176%, respectively. After adding carbon nanotubes, the flexural and compressive strength of composite thermal insulation materials are improved significantly, the electromagnetic shielding effectiveness of materials is also improved significantly when electromagnetic radiation frequencies are between 515 GHz. |
| Key words: composite thermal insulation material polypropylene（PP） fiber carbon nanotube mechanical property electromagnetic shielding effectiveness |
