多壁碳纳米管改性磷建筑石膏性能影响研究  

Study on the Effect of Carbon Nanotubes Modified Phosphorous Building Gypsum

作　　者：季敏[1] 蒋博林[1] 皇甫双娥[2] Ji Min;Jiang Bolin;Huang-Fu Shuang’e(Chongqing Engineering Vocational and Technical College,Chongqing 402200;Faculty of Civil Engineering and Architecture,Kunming University of Science and Technology,Kunming,Yunnan 650500)

机构地区：[1]重庆工程职业技术学院土木工程学院,重庆402200 [2]昆明理工大学建筑工程学院,云南昆明650500

出　　处：《非金属矿》2021年第6期53-55,共3页Non-Metallic Mines

基　　金：重庆市自然科学基金面上项目(cstc2020jcyj-msxmX0923);重庆市教委科学技术研究青年项目(KJQN201903405)。

摘　　要：采用多壁碳纳米管材料对磷建筑石膏进行改性,研究了多壁碳纳米管在不同掺量、分散方式下对磷建筑石膏力学性能影响,并采用扫描电镜、孔隙度分析仪对多壁碳纳米管改性磷建筑石膏的微观形貌、累计孔隙体积进行分析,对多壁碳纳米管的改性机理进行初步探究。结果表明,在超声-分散剂分散方式下,多壁碳纳米管掺量为0.03%时,改性磷建筑石膏的绝干抗折强度、绝干抗压强度达到最优值,分别为4.94 MPa、17.46 MPa,较空白组分别增加34.6%、38.02%。掺入适量多壁碳纳米管,磷建筑石膏累计孔隙体积范围减小至0~0.0025 cm^(3)/g范围,充分填充了孔隙宽度在0~20 nm范围的孔隙,使磷建筑石膏内部结构更加密实,力学性能提高。The effect of multi-walled carbon nanotubes on the mechanical properties of phosphorus building gypsum under different doping and dispersion methods was investigated.The microscopic morphology and accumulated pore volume of multi-walled carbon nanotubes modified phosphorus building gypsum were analyzed by scanning electron microscopy(SEM)and porosity analyzer(BET),and the modification mechanism of multi-walled carbon nanotubes was initially investigated.The results showed that under the ultrasonic-dispersant dispersion method,when the dosage of multi-walled carbon nanotubes was 0.03%,the absolute dry flexural strength and absolute dry compressive strength of phosphorus building gypsum reached the optimum values of 4.94 MPa and 17.46 MPa,respectively,with an increase of 34.6%and 38.02%compared to the blank group.The appropriate amount of multi-walled carbon nanotubes incorporated into phosphorus building gypsum can reduce its cumulative pore volume range to 0-0.0025 cm^(3)/g,fully filling the pores in the pore width region of 0-20 nm,making the internal structure of phosphorus building gypsum denser,and improve the mechanical properties of phosphorus building gypsum.

关 键 词：多壁碳纳米管 磷建筑石膏 力学性能 微观形貌 累计孔隙体积 

分 类 号：TQ177.3[化学工程—硅酸盐工业]