共查询到19条相似文献，搜索用时 109 毫秒
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含Si环氧丙烯酸酯/纳米SiO_2涂层制备及性能研究 总被引：1，自引：1，他引：0
为了制备耐热、阻燃性能优异的新型含Si环氧丙烯酸酯(EA)纳米涂层,以KH-570改性纳米SiO2和有机硅改性EA作紫外光(UV)固化组分,并在配方中加入纳米Mg(OH)2,制备了系列UV固化新型含Si EA纳米涂层。通过红外光谱仪、紫外可见光谱仪、热重分析仪等研究紫外光固化体系涂膜耐热、阻燃及光学性能。结果表明:在有机硅改性EA中添加KH-570改性纳米SiO2,可以提高纳米涂层热稳定性、阻燃性,同时使其保持优良透明性;当改性纳米SiO2含量达5%时,涂膜耐热、阻燃性能均最佳;同时在体系中加入Mg(OH)2,可进一步改善体系的阻燃效果。 相似文献
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以质量分数50%的聚硅氧烷(DC-3074)、20%聚氨酯(DH317)和30%三丙二醇二丙烯酸酯(TPGDA)为原料,经室温下冷混制得改性聚硅氧烷树脂,再以质量分数14%的氨基硅烷(HD-602)为固化剂,并加入适量颜料及助剂而制得改性聚硅氧烷彩色涂膜.该涂料具有优良的耐候性能(3 000h失光率≤15%),预计可用作钢结构重防腐涂料. 相似文献
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《宜宾学院学报》2016,(12):103-107
用硝酸锌和氨水为原料,以均匀沉淀法制备纳米氧化锌,经四甲氧基硅烷表面改性后,加入1%壳聚糖溶液中,制得纳米氧化锌/壳聚糖复合膜(ZnO-CTF),采用XRD、SEM、FT-IR和TG进行表征.结果表明ZnO为六方晶体结构,平均粒度为34nm,表面积大,达到纳米级别;改性后的氧化锌晶型不变,衍射峰变窄,衍射强度变强,分散性良好.改性ZnO的最佳添加量为0.15 g时成膜性能好,对甲基橙的吸附率可达90.9%,与纯壳聚糖膜(CTF)吸附甲基橙相比较,ZnO-CTF的吸附性能更好,吸附率是CTF的3倍.ZnO与壳聚糖在ZnO-CTF对甲基橙的吸附中具有协同作用. 相似文献
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《实验室研究与探索》2017,(12):36-39
以SnCl_4·5H_2O为原料,改性海泡石为载体,采用超声溶胶-凝胶法制备出负载型3D-SnO_2/改性海泡石催化剂,采用X射线衍射、扫描电镜、比表面积仪对催化剂进行表征。以甲基橙作为模拟废水(20 mg/L),研究了3D-SnO_2/改性海泡石制备条件对其光降解性能的影响。结果表明:在溶液pH 7.0~8.0,焙烧温度480℃条件下制备的块状3D-SnO_2/改性海泡石催化剂(SnO_2负载量15%),比表面积86 m~2/g,平均孔径80.97 nm,催化剂用量30mg的条件下,催化剂对模拟废水的降解率在300 min达到98.5%,催化剂稳定性较好。 相似文献
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该实验以BA、AA为核单体,并加入SiO2溶胶对其改性,以MMA、BA、AA为壳单体采用半连续核-壳乳液聚合法制备纳米SiO2溶胶改性纯丙乳液,着重探讨了引发剂用量对SiO2溶胶改性纯丙乳液的合成及性能的影响,并且进行凝胶率、吸水率、固含量等指标的检测.实验结果表明:在引发剂含量占单体的0.65%时,乳液性能最佳,其中凝胶率为10.77%,固含量为39.38%,吸水率为24.11%,离心稳定率为3.66%,各稳定性均合格. 相似文献
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王佼 《北京工业职业技术学院学报》2007,6(3):19-23
研究了以硅藻土为原料,应用沉淀法制备白炭黑的工艺中,巯基硅烷A-189的用量对白炭黑吸油率和比表面积的影响,结果表明:改性白炭黑产品粒度分布均匀,可达纳米级,用W4的巯基硅烷改性所得产品具有最大的比表面积,其值为271.105m2/g,改性剂分子与白炭黑颗粒表面发生了化学吸附. 相似文献
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以氯仿-甲苯为溶剂,用溶液聚合法合成苯乙烯-马来酸酐(SMA)共聚物,经过氨水溶解得到SMA水溶性分散剂。该分散剂与苯乙烯(St)、甲基丙烯酸十二酯(LMA)采用无皂乳液聚合法制备SMA的无皂乳液。探究了单体配比、LMA、SMA等因素对无皂乳液性能的影响,得出反应合成的最佳条件是:m(St)∶m(LMA)=2.67∶1.00,LMA的用量(相对于混合溶液)为5%,SMA的用量(相对于混合溶液)为8%。用红外、热分析等分析手段对共聚物进行结构表征与性能分析。实验结果表明,SMA无皂乳液涂膜有良好的耐水性能和耐有机溶剂性能,且具有较高的热稳定性能,在328.58℃开始失重,玻璃化温度在165.7℃。 相似文献
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Phenolic resin(PF) and nano-SiO2 were used to improve the curing property and high humidity resistance of epoxy resin (EP) and methyl nadic anhydride (MNA)
resistor paint, respectively. Hydrogen bonds, formed between phenolic resin and nano-SiO2 in alcohol, made nano-SiO2 disperse easily in EP/MNA paint through phenolic resin without being treated by supersonic vibration. When the mass ratio
of PF to EP in paint is 3:7, the formed composite paint film can be cured in 2 min at 170 °C. When the mass ratio of nano-SiO2 to PF in paint is 3:100, the property of high humidity resistance of the composite paint is the best, meeting the requirement
of varying ratio of resistance less than 0.1% after experiment on high humidity resistance. SEM analysis shows the surface
of the composite paint film is smooth, glassy, tight and homogeneous, without acicular air holes. 相似文献
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The modification of the traditional interior wall paint was carried out by means of adding nano-TiO2 as a functional pigment. By regulating the dosage of dispersant, the nano-particles can be dispersed in paint homogeneously. With two aspects of experiments： dosage of nano-TiO2 and pigment volume concentration （PVC）, the paint formulation can be optimized and its properties~ such as hardness, scrub resistance, storage stability, contrast ratio and gloss can be improved. Finally an interior wall paint with high performance and air purification was prepared. Its character of formaldehyde degradation would be discussed in the next article. 相似文献
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纳米二氧化钛修饰的内墙涂料的制备和性质研究(英文) 总被引：1，自引：0，他引：1
The modification of the traditional interior wall paint was carried out by means of adding nano-TiO_2 as a functional pigment.By regulating the dosage of dispersant,the nano-particles can be dispersed in paint homogeneously.With two aspects of experiments:dosage of nano-TiO_2 and pigment volume concentration (PVC),the paint formulation can be optimized and its properties,such as hardness,scrub resistance,storage stability,contrast ratio and gloss can be improved.Finally an interior wall paint with high performance and air purification was prepared.Its character of formaldehyde degradation would be discussed in the next article. 相似文献
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为满足客户的要求,获得表面均一、耐蚀性能好的包装用涂漆捆带,对影响涂漆捆带的诸多因素进行了全面分析。包括冷轧基板表面状态、热处理过程、杂质离子、原漆质量、漆膜厚度、涂漆工艺、涂漆后处理及其他对漆膜的机械性损伤等。并针对这些因素提出了相应的改进措施。 相似文献
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水性聚氨酯涂料贮存稳定性研究 总被引：1，自引：0，他引：1
从树脂工业化生产工艺的角度,探讨了分散设备、分散温度、熟化时间等因素对水性聚氨酯分散体和原漆贮存稳定性的影响;并通过对水性聚氨酯涂料的配漆工艺和涂料配方组分的研究,全面分析了涂料生产过程中剪切分散的速度与时间、涂料配方组分中成膜助剂与增稠剂等因素对涂料贮存稳定性与漆膜性能的影响,得到了制备优异贮存稳定性水性聚氨酯涂料的树脂生产工艺、配漆工艺及配方组分的优化配置方法。 相似文献
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采用聚氧化丙烯二醇（PPG）、异佛尔酮二异氰酸酯（IPDI）,甲苯二异氰酸酯（TDI）、二羟甲基丙酸（DMPA）等分别合成了IPDI型和TDI型水性聚氨酯（WPU）乳液,用共混的方法将阻燃剂FR-600引入到水性聚氨酯中,从而得到一系列阻燃水性聚氨酯。采用红外光谱对合成产物进行表征,并用氧指数仪、Zeta电位测试仪等对其性能进行研究。结果表明,阻燃剂FR-600能显著提高水性聚氨酯的阻燃性能,随着阻燃剂用量的增加,水性聚氨酯的极限氧指数不断增大,对于IPDI型水性聚氨酯,当阻燃剂FR-600的添加量为水性聚氨酯的8%时,其氧指数可达37%,使水性聚氨酯由可燃降低为不燃。对于TDI型水性聚氨酯,在阻燃剂添加量为10%时,其极限氧指数达到36%,达到了不燃级。粒径和Zeta电位测试表明,阻燃剂的加入对两种水性聚氨酯的粒径及稳定性影响不大。 相似文献
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《Journal of educational and psychological consultation》2013,23(4):355-360
The astute reader, after some study of the previous two articles, will note a fundamental difference: We (Witt, Gresham, & Noell, this issue) propose that data supporting the efficacy of behavioral consultation (BC) is such that we would categorize BC as 'Not Proven Effective' and Erchul and Schulte (this issue), with some qualification, argue that BC should be categorized as 'Proven Effective.' The differences between the two articles derive from important epistemological, logical, and philosophical differences about the accrual of data into a systematic body of knowledge. In this article, we highlight the areas of difference with the goal of improving our knowledge base about BC, which we hope continues to evolve as a practice and a science. We address three topics: (a) epistemology, (b) functional analysis versus problem analysis, and (c) efficiency versus effectiveness. 相似文献
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Muhammad Waqas Yoon-Ha Kim Abdul Latif Khan Raheem Shahzad Sajjad Asaf Muhammad Hamayun Sang-Mo Kang Muhammad Aaqil Khan In-Jung Lee 《Journal of Zhejiang University. Science. B》2017,18(2):109-124
We studied the effects of hardwood-derived biochar (BC) and the phytohormone-producing endophyte Galactomyces geotrichum WLL1 in soybean (Glycine max (L.) Merr.) with respect to basic, macro- and micronutrient uptakes and assimilations, and their subsequent effects on the regulation of functional amino acids, isoflavones, fatty acid composition, total sugar contents, total phenolic contents, and 1,1-diphenyl-2-picrylhydrazyl (DPPH)-scavenging activity. The assimilation of basic nutrients such as nitrogen was up-regulated, leaving carbon, oxygen, and hydrogen unaffected in BC+G. geotrichum-treated soybean plants. In comparison, the uptakes of macro- and micronutrients fluctuated in the individual or co-application of BC and G. geotrichum in soybean plant organs and rhizospheric substrate. Moreover, the same attribute was recorded for the regulation of functional amino acids, isoflavones, fatty acid composition, total sugar contents, total phenolic contents, and DPPH-scavenging activity. Collectively, these results showed that BC+G. geotrichum-treated soybean yielded better results than did the plants treated with individual applications. It was concluded that BC is an additional nutriment source and that the G. geotrichum acts as a plant biostimulating source and the effects of both are additive towards plant growth promotion. Strategies involving the incorporation of BC and endophytic symbiosis may help achieve eco-friendly agricultural production, thus reducing the excessive use of chemical agents. 相似文献
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辐射型隔热涂料的研究 总被引：2，自引：0，他引：2
以过渡金属氧化物Fe2O3、MnO2为主要组分,掺入NiO、Co2O3、CuO,通过固相烧结制备红外辐射材料;优选发射率较高的A、B试样与堇青石复合制备堇青石-过渡金属氧化物红外辐射材料,并将制得的红外辐射材料作为功能填料制备辐射型隔热涂料,并对其隔热机理进行了探讨。研究表明:添加40wt%试样B制备的堇青石-过渡金属氧化物复合红外辐射材料8~14um的红外发射率达95.4%;以TBH为成膜基料,添加2.0g堇青石-过渡金属氧化物红外辐射材料为填料制备隔热涂料的热反射率达73.2%。 相似文献