Zhao Dong, Kong Lingcheng, Wang Jiaxin, Jiang Guodong, Zhang Jun, Shen Yucai, Wang Tingwei
College of Material Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing 211816, China.
Polymers (Basel). 2022 May 11;14(10):1944. doi: 10.3390/polym14101944.
Ceramifiable silicone rubber (SR) composites with excellent self-supporting properties and ceramifiable properties were prepared by incorporating silicate glass frits (SGFs) and sodium tripolyphosphate (STPP) into the SR. Ceramic residues were obtained by firing ceramifiable SR composites at 700, 850, and 1000 °C for 30 min. The bending angles of the composites were tested for evaluating the self-supporting property. To evaluate the ceramifiable properties of the ceramifiable SR composite, flexural strength, water absorption, and bulk density of its residues were tested. It was found that the addition of STPP improved the shape stability and the self-supporting property of the composites at high temperatures. The flexural strength of the ceramic residue of the composite with STPP firing above 850 °C is more than 5 MPa. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analysis showed that the relative content of the crystalline phase was enhanced by about 25% due to the addition of STPP. Furthermore, a possible mechanism for the formation of the crystalline phase was proposed. Scanning elector microscope (SEM) and energy dispersive spectrometry (EDS) analysis demonstrated that with the temperature increase, the inter-infiltration between these melts became easier, which implies that the bulk density of the ceramic residue was improved.
通过将硅酸盐玻璃料（SGFs）和三聚磷酸钠（STPP）加入到硅橡胶（SR）中，制备出了具有优异自支撑性能和可陶瓷化性能的可陶瓷化硅橡胶复合材料。通过在700、850和1000℃下将可陶瓷化SR复合材料烧制30分钟，获得了陶瓷残渣。测试了复合材料的弯曲角度以评估其自支撑性能。为了评估可陶瓷化SR复合材料的可陶瓷化性能，测试了其残渣的弯曲强度、吸水率和体积密度。结果发现，STPP的加入提高了复合材料在高温下的形状稳定性和自支撑性能。在850℃以上烧制且含有STPP的复合材料的陶瓷残渣的弯曲强度大于5MPa。X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）分析表明，由于STPP的加入，晶相的相对含量提高了约25%。此外，还提出了晶相形成的可能机理。扫描电子显微镜（SEM）和能谱分析（EDS）表明，随着温度升高，这些熔体之间的相互渗透变得更容易，这意味着陶瓷残渣的体积密度得到了提高。
