千枚岩型废石制备聚丙烯填料的研究
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摘要
对酒钢千枚岩型废石进行超细粉磨、表面改性,通过双螺杆挤出制备废石/聚合物复合材料。结果表明,用干式球磨机球磨70 min,可制得粒度D_(90)为16.18μm的超细微粉;以铝酸酯偶联剂改性废石微粉,当质量分数为1.6%,改性温度110℃,改性时间30 min时,废石微粉活性指数达96.50%。红外光谱(FTIR)表明改性剂是以化学吸附的方式与废石微粉结合,说明偶联剂使废石达到了表面疏水改性的目的;扫面电镜(SEM)表明,改性后废石微粉能均匀分散到聚丙烯(PP)基体中。当改性废石微粉填充量为10 phr时,复合材料拉伸强度、冲击强度、弯曲强度和弯曲模量分别为:35.70 MPa、37.33 k J/m~2、36.92 MPa、832.10 MPa。
The ultrafine grinding and surface modification were carried out to phyllites from waste rocks in JISCO. The polypropylene/phyllite composites were prepared. The results show that the rocks can be grounded to the particle size D_(90) of 16. 18 μm by dry ball mill. The best suitable surface modification agent is aluminate coupling agent DL-411. When the content of DL-411 is 1. 6 wt%and the modification temperature is110 ℃, the activity index of modified waste rocks is 96. 50%. The results of Fourier transform infrared spectroscopy show the chemisorption between DL-411 and waste rocks is occurred. And the scanning electron microscopy results show the modified waste rocks can disperse in polypropylene uniformly. When the content of waste rocks particles is 10 phr, the tensile strength, impact strength, flexural strength and flexural modulus of the composites are 35. 70 MPa,37. 33 k J/m~2,36. 92 MPa,832. 10 MPa,respectively.
The ultrafine grinding and surface modification were carried out to phyllites from waste rocks in JISCO. The polypropylene/phyllite composites were prepared. The results show that the rocks can be grounded to the particle size D_(90) of 16. 18 μm by dry ball mill. The best suitable surface modification agent is aluminate coupling agent DL-411. When the content of DL-411 is 1. 6 wt%and the modification temperature is110 ℃, the activity index of modified waste rocks is 96. 50%. The results of Fourier transform infrared spectroscopy show the chemisorption between DL-411 and waste rocks is occurred. And the scanning electron microscopy results show the modified waste rocks can disperse in polypropylene uniformly. When the content of waste rocks particles is 10 phr, the tensile strength, impact strength, flexural strength and flexural modulus of the composites are 35. 70 MPa,37. 33 k J/m~2,36. 92 MPa,832. 10 MPa,respectively.
引文
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[2]陈禄政,熊大和,任南琪,等.采用连续离心分离技术回收细铁尾矿中铁[J].中南大学学报(自然科学版),2008,39(6):1257-1261.
[3]邓晓娟,鄢海丰,梁嘉琪.利用建筑渣土生产新型烧结墙体材料的可行性研究[J].砖瓦,2016(3):50-52.
[4]郭敏,王兴,常文韬,等.铁矿尾矿废渣的深度开发与利用[C]//2013中国环境科学学会学术年会论文集(第五卷).[出版地不详]:[出版者不详],2013.
[5]李瑞龙.高浓尾矿胶结充填材料的试验研究[D].西安西安建筑科技大学,2015.
[6]宋海峰,石阳阳,鲍俊杰,等.聚丙烯/改性高岭土复合材料的制备及性能表征[J].应用化工,2015(4):697-701.
[7]BATISTELLA M,OTAZAGHINE B,SONNIER R,et al.Fire retardancy of polypropylene/kaolinite composites[J].Polym Degrad Stab,2016,129:260-267.
[8]曹曦,徐熙,郑水林.膨润土插层改性及其在EVA复合阻燃填料中的应用[C]//全国非金属矿加工利用技术交流会暨2011年非金属矿物材料发展战略研讨会.2011.
[9]贾振梅.云母、蒙脱土增强硅橡胶复合材料的制备及性能研究[D].南京:南京工业大学,2011.
[10]丁茜,章自寿,罗建新,等.废旧聚丙烯再资源化技术的发展现状[J].塑料工业,2017,45(5):16-19.
[11]郭亚光.高熔体强度聚丙烯及其纳米碳酸钙复合材料的制备与性能研究[D].广州:华南师范大学,2016.
[12]韦良强,黄安荣,戚远慧,等.聚丙烯(PP)基介电复合材料的研究[J].塑料工业,2017,45(2):120-124.
[13]阮锦泉.聚丙烯/硅灰石复合材料性能及其增强增韧机理研究[D].广州:华南理工大学,2014.
[14]邹恩广.聚丙烯复合材料的制备及性能研究[D].黑龙江:东北石油大学,2011.
[15]张旭.PP/EVOH共混改善聚丙烯亲水性的研究[D].大连:大连工业大学,2011.
[16]周团元.聚丙烯/多壁碳纳米管复合材料热稳定性及结晶行为研究[D].广州:华南理工大学,2016.
[17]任瑞晨,孙文福.千枚岩粉体橡胶填料开发研究[J].非金属矿,2003,26(5):27-29.
[18]KIM S J.Phyllite as a new flame retardant synergist for ABSresin containing bromine flame retardant[J].Elastome Compos,2006,41(3):172-181.
[19]胡小冬.铝土矿选矿尾矿制备聚合物填料的研究[D].长沙:中南大学,2008.
[20]傅强.木粉的表面改性及其对聚丙烯/木粉复合材料力学性能的影响[J].塑料工业,2016,44(7):102-106.