SiO_2/HCNFs双相纳米填料的制备与表征
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摘要
使用原位接枝法在螺旋纳米炭纤维表面接枝纳米二氧化硅粒子,制备补强性能良好的SiO_2/HCNFs双相纳米填料。利用TEM、SEM、FT-IR对样品的形貌和组成进行了表征,重点探讨了接枝反应温度对SiO_2/HCNFs双相填料形貌和结合胶含量的影响。结果表明,硝酸对螺旋纳米炭纤维有明显的截断作用,可降低纤维的长径比;接枝产物SiO_2/HCNFs双相纳米填料形貌好,纤维表面的纳米SiO_2粒子形貌较佳,分布均匀;SiO_2/HCNFs双相纳米填料中SiO_2粒子的量会随着反应温度的升高先增加后减小,其中当反应温度在80～90℃时,接枝效果最佳;当反应温度为90℃时,制备出的SiO_2/HCNFs双相纳米填料的结合胶含量最高为30.5%,对天然橡胶的补强效果最好。
SiO_2/HCNFs biphase nanofillers with good property were prepared by in-situ grafting of silica nanoparticles on the surface of helical carbon nanofibers. The morphology and composition of the samples were characterized by TEM, SEM and FT-IR, and the influence of the grafting reaction temperature on the morphology and bound rubber content of the SiO_2/HCNFs biphase nanofiller was discussed. The results show that nitric acid has obvious truncation effect on the helical carbon nanofiber, and the ratio of length to diameter of fiber can be reduced. The SiO_2/HCNFs biphase nanofiller by grafting shows good morphology, in which the SiO_2 nanoparticles were uniformly distributed on the fiber surface. The amount of SiO_2 nanoparticles in SiO_2/HCNFs biphase nanofiller increases first and then decreases with the increase of reaction temperature. When the reaction temperature is 80～90 ℃, it shows the best grifting effect. When the reaction temperature is 90 ℃, the SiO_2/HCNFs biphase nanofiller has the highest bound rubber content and the highest reinforcing effect on natural rubber.
SiO_2/HCNFs biphase nanofillers with good property were prepared by in-situ grafting of silica nanoparticles on the surface of helical carbon nanofibers. The morphology and composition of the samples were characterized by TEM, SEM and FT-IR, and the influence of the grafting reaction temperature on the morphology and bound rubber content of the SiO_2/HCNFs biphase nanofiller was discussed. The results show that nitric acid has obvious truncation effect on the helical carbon nanofiber, and the ratio of length to diameter of fiber can be reduced. The SiO_2/HCNFs biphase nanofiller by grafting shows good morphology, in which the SiO_2 nanoparticles were uniformly distributed on the fiber surface. The amount of SiO_2 nanoparticles in SiO_2/HCNFs biphase nanofiller increases first and then decreases with the increase of reaction temperature. When the reaction temperature is 80～90 ℃, it shows the best grifting effect. When the reaction temperature is 90 ℃, the SiO_2/HCNFs biphase nanofiller has the highest bound rubber content and the highest reinforcing effect on natural rubber.
引文
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[3]Jian X,Jiang M,Zhou Z,et al.Gas-induced formation of Cu nanoparticle as catalyst for high-purity straight and helical carbon nanofibers[J].Acs Nano,2012,6(10):8611.
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[6]Flanigan C M,Beyer L,Klekamp D,et al.Comparative study of silica,carbon black and novel fillers in tread compounds[J].Rubber World,2012,245(5):18-31.
[7]何淑婷,刘宝春.纳米SiO2的表面改性[J].应用化工,2017,46(4):693-697.
[8]陈博,陈学琴,任军,等.纳米二氧化硅表面改性研究进展[J].有机硅材料,2017,31(5):396-400.
[9]安秋凤,郭锟.纳米SiO2表面改性及其应用在复合材料中的研究进展[J].纳米科技,2007,4(5):9-14.
[10]龚勇,陈建,张华知,等.低温螺旋纳米炭纤维的制备与表征[J].炭素技术,2014(5):14-17.
[11]任娇,金永中,陈建,等.钴催化剂制备螺旋纳米炭纤维[J].炭素技术,2017,36(3):20-23.
[12]Cochet,Petit,L Barriquand,等.高分散性沉淀法白炭黑在轮胎中的应用研究[J].轮胎工业,2001,21(8):482-489.
[13]向前,涂学忠.白炭黑/炭黑补强胎面胶[J].轮胎工业,1999(2):100-103.
[14]Zhou H,Zhang C,Li H,et al.Fabrication of silica nanoparticles on the surface of functionalized multiwalled carbon nanotubes[J].Carbon,2011,49(1):126-132.
[15]Cucos A,Budrugeac P,Miu L,et al.Dynamic mechanical analysis(DMA)of new and historical parchments and leathers:Correlations with DSC and XRD[J].Thermochimica Acta,2011,516(1):19-28.
[16]张皓瑜,陈长江,杨秉新.碳黑填充橡胶的动态力学表征[J].吉林大学自然科学学报,1995(3):89-93.