MDI改性硅丙复合Si-P-C-N涂层的制备及性能研究  

Preparation and Properties of MDI Modified Silicon-propylene Composite Si-P-C-N Coating

作　　者：呼伟 王亚超[2] 马玉红 宁占玉 HU Wei;WANG Ya-chao;MA Yu-hong;NING Zhan-yu(Zhongfu Shenying Carbon Fiber Xining Co Ltd,Xining 811600,China;College of Resources and Engineering,Xi′an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]中复神鹰碳纤维西宁有限公司,西宁811600 [2]西安建筑科技大学资源工程学院,西安710055

出　　处：《武汉理工大学学报》2024年第7期28-37,共10页Journal of Wuhan University of Technology

摘　　要：为提高硅丙乳液(SAE)的阻燃性,以SAE为基料,三聚氰胺聚磷酸盐(MPP)和亚磷酸二乙酯(DEP)为酸源、β-环糊精(β-CD)为碳源、尿素(Urea)为气源、二苯基甲烷二异氰酸酯(MDI-100L)为协效剂,构筑MDI改性硅丙复合Si-P-C-N涂层。利用锥形量热仪(CONE)等研究MDI-100L对复合涂层阻燃和抑烟性能的影响;使用红外光谱仪(FT-IR)等分析复合涂层的微观结构;通过热解动力学计算分析复合涂层的热性能;使用紫外线老化试验机测试复合涂层的抗老化性能。结果表明:合适质量掺量的MDI-100L(1.0%)促进在燃烧中形成阻隔热源和火源的不可燃残留物,并在燃烧中释放难燃气体,使热释放速率峰值和产烟量分别降低36.05%和23.01%。通过热解动力学分析得出,1.0%的样品使E_(α)在370~455℃从386.76 kJ/mol升高到412.39 kJ/mol,对应热稳定性增强。To enhance the flame retardancy of silicone-acrylic emulsion(SAE),MDI-modified silicon-acrylic composite Si-P-C-N coating.is constructed by using SAE as the base material,melamine polyphosphate(MPP) and diethyl phosphite(DEP) as acid sources,β-cyclodextrin(β-CD) as carbon source,urea as gas source,and 4,4'-diphenylmethane diisocyanate(MDI-100L) as synergist.The effect of MDI-100L on flame retardancy and smoke suppression of the composite coating is studied by cone calorimeter(CONE) and thermogravimetric infrared analyzer(TG-IR).The microstructure was analyzed by infrared spectrometer(FT-IR) and scanning electron microscope(SEM).The thermal stability was analyzed by pyrolysis kinetic calculation.The anti-aging performance was tested using an ultraviolet aging tester.The results show that the appropriate dosage of MDI-100L(1.0%) promotes the formation of non-combustible residues that block heat sources and fire sources during combustion,and releases refractory gases during combustion,so that the peak heat release rate and smoke production are reduced by 36.05% and 23.01%,respectively.According to the pyrolysis kinetic analysis,1.0% of the sample increased the E_α from 386.76 kJ/mol to 412.39 kJ/mol at 370 ~ 455 °C,indicating enhanced thermal stability.

关 键 词：硅丙乳液 三聚氰胺聚磷酸盐 β-环糊精 MDI 改性 热解动力学 

分 类 号：TB332[一般工业技术—材料科学与工程]