蓝色铝颜料的制备及其对PP抗UV光氧老化性能研究
发布时间：2018-10-21 08:42
【摘要】：铝颜料是由微纳米级二维片状金属铝基所组成的粉状,具有着独特性质的金属颜料,常常在涂料工业中制备汽车金属闪光面漆,或在塑料工业中作为闪光颜料使用。然而,近些年来随着国家及地方政府绿色环保政策的出台以及人们环保观念的逐渐增强,以往使用的油性(即溶剂型)铝颜料已不能满足工业清洁生产环保、健康的需求,许多学者及公司开始致力于环保(即水性)铝颜料的制备及研究。此外,相对于有机颜料而言,金属颜料单一的颜色使得其应用面较窄,铝颜料的彩色化也是目前研究的一个重要方向。本文分别就铝颜料的耐腐蚀性和着色对铝颜料的片基粉体进行双层包覆改性,并对其作为聚丙烯(PP)抗UV光氧老化性能填料的应用进行相应研究,具体的研究内容由以下三个部分构成:(1)本文首先通过硅烷偶联剂(YSiR_3)与正硅酸乙酯(TEOS)作为前驱体,共水解缩聚后制备出SiO_2包覆的铝颜料片基,并研究不同硅烷偶联剂对铝片基表面改性的影响。实验中,分别使用短链硅烷偶联剂3-氨丙基三乙氧基硅烷(APTES)、乙烯基三乙氧基硅烷(VTES)与长链硅烷偶联剂十二烷基三甲氧基硅烷(DBES)来包覆改性铝片基,并采用SEM、FTIR、粒径分析等手段对硅烷偶联剂包覆改性后的铝片基进行表征。研究结果表明:相比于短链硅烷偶联剂,长链硅烷偶联剂DBES与TEOS共水解缩聚可以在铝颜料表面形成一层致密的SiO_2膜层,有效地提高了铝片基的耐腐蚀性。同时,通过正交实验的方法进一步优化确定了 DBES和TEOS共水解缩聚包覆铝片基的反应条件,结果表明在3份TEOS,1份DBES、6份氨水、8份去离子水的条件下,在50℃的恒温水浴锅反应6h后,可以得到耐腐蚀性最佳的SiO_2包覆的铝片基。(2)在制备出SiO_2包覆的铝片基(Al/SiO_2)的基础上,对其进行着色改性,制备出有机酞菁颜料包覆的蓝色铝颜料。实验中首先使用浓硫酸与酞菁蓝(CuPc)进行磺化反应,制备出CuPc-SO_3H有机颜料。再使用液相沉积法对Al/SiO_2片基进行着色,即利用CuPc-SO_3H与沉淀剂BaCl_2反应形成Ba(CuPc-SO_3)_2沉淀颗粒沉积在Al/SiO_2片基的表面上,起到着色的效果。通过SEM、FTIR、XRD等表征CuPc-SO_3H颜料的添加量、色淀剂添加量、表面活性剂种类、反应时间等条件对着色铝颜料的色泽影响,得到的结论是:相对铝颜料Al/SiO_2,在CuPc-SO_3H添加量为5wt%,BaCl_2用量5wt%,以SDS作为表面活性剂反应90min后,可以得到光泽度最高的蓝色铝颜料。(3)为了进一步研究制备出的蓝色颜料与树脂的相容性及其耐UV光老化性能,将本实验中制备出的Al/SiO_2/Ba(CuPc-S0_3)_2蓝色铝颜料与光稳定剂UV-622、抗氧化剂1010同时加入到聚丙烯(PP)中,通过双螺杆挤出、热压成型、注塑成型等方式制备出免喷涂蓝色PP塑料,再使用紫外线加速老化灯对制备出的样条进行加速光老化处理。通过拉伸性能和光学性能测试表征研究光稳定剂UV-622和抗氧化剂1010对PP着色塑料的抗老化作用。最终确定,在着色铝颜料含量为0.6wt%,光稳定剂UV622含量为0.8wt%,抗氧化剂1010含量为2.0 wt%的条件下,制备出的蓝色PP塑料在紫外灯加速老化照射336h后,相对于UV光老化前其拉伸强度下降1.7MPa,断裂伸长率下降5.8%,光学性能上总色差 △E 为 1.31。
[Abstract]:The aluminum pigment is a powder composed of micro-nano-scale two-dimensional sheet metal aluminum base, metal pigment with unique properties, automobile metal flash surface paint often prepared in the coating industry, or used as a flash pigment in the plastic industry. However, in recent years, along with the promulgation of green environmental protection policy of state and local government and the gradual enhancement of the concept of environmental protection, the oil-based (i.e. solvent-based) aluminum pigment used in the past can not meet the requirement of environmental protection and health of industrial cleaning. Many scholars and companies began to devote themselves to the preparation and research of environmental protection (water-based) aluminum pigment. In addition, with respect to the organic pigment, the single color of the metal pigment makes its application surface narrow, and the colorization of the aluminum pigment is also an important direction of the present research. In this paper, two-layer coating modification was carried out on the corrosion resistance and coloring of aluminum pigment, and the application of polypropylene (PP) anti-UV photo-oxygen aging performance filler was studied. The specific research content was composed of three parts: (1) The aluminum pigment flakes coated with SiO _ 2 were prepared by silane coupling agent (YSiR _ 3) and tetraethyl silicate (TEOS) as precursors, and the effects of different silane coupling agents on the surface modification of aluminum sheet were studied. In the experiment, short chain silane coupling agent 3-aminopropyltrimethoxysilane (APTES), vinyltriethoxy silane (VTES) and long chain silane coupling agent dodecyl trimethoxysilane (DBES) were used to coat the modified aluminum sheet group, and SEM and FTIR were used. The aluminum sheet base modified by silane coupling agent was characterized by particle size analysis. The results show that, compared with the short-chain silane coupling agent, the long-chain silane coupling agent DBES and TEOS co-hydrolytic polycondensation can form a dense SiO _ 2 film layer on the surface of the aluminum pigment, and the corrosion resistance of the aluminum sheet group is effectively improved. The reaction conditions of DBES and TEOS were further optimized by orthogonal experiment. The results showed that under the conditions of 3 parts TEOS, 1 parts of DBES, 6 parts of ammonia water and 8 parts of deionized water, the reaction conditions were carried out at 50 鈩，
本文编号：2284572
[Abstract]:The aluminum pigment is a powder composed of micro-nano-scale two-dimensional sheet metal aluminum base, metal pigment with unique properties, automobile metal flash surface paint often prepared in the coating industry, or used as a flash pigment in the plastic industry. However, in recent years, along with the promulgation of green environmental protection policy of state and local government and the gradual enhancement of the concept of environmental protection, the oil-based (i.e. solvent-based) aluminum pigment used in the past can not meet the requirement of environmental protection and health of industrial cleaning. Many scholars and companies began to devote themselves to the preparation and research of environmental protection (water-based) aluminum pigment. In addition, with respect to the organic pigment, the single color of the metal pigment makes its application surface narrow, and the colorization of the aluminum pigment is also an important direction of the present research. In this paper, two-layer coating modification was carried out on the corrosion resistance and coloring of aluminum pigment, and the application of polypropylene (PP) anti-UV photo-oxygen aging performance filler was studied. The specific research content was composed of three parts: (1) The aluminum pigment flakes coated with SiO _ 2 were prepared by silane coupling agent (YSiR _ 3) and tetraethyl silicate (TEOS) as precursors, and the effects of different silane coupling agents on the surface modification of aluminum sheet were studied. In the experiment, short chain silane coupling agent 3-aminopropyltrimethoxysilane (APTES), vinyltriethoxy silane (VTES) and long chain silane coupling agent dodecyl trimethoxysilane (DBES) were used to coat the modified aluminum sheet group, and SEM and FTIR were used. The aluminum sheet base modified by silane coupling agent was characterized by particle size analysis. The results show that, compared with the short-chain silane coupling agent, the long-chain silane coupling agent DBES and TEOS co-hydrolytic polycondensation can form a dense SiO _ 2 film layer on the surface of the aluminum pigment, and the corrosion resistance of the aluminum sheet group is effectively improved. The reaction conditions of DBES and TEOS were further optimized by orthogonal experiment. The results showed that under the conditions of 3 parts TEOS, 1 parts of DBES, 6 parts of ammonia water and 8 parts of deionized water, the reaction conditions were carried out at 50 鈩，
本文编号：2284572
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