排序方式: 共有53条查询结果,搜索用时 31 毫秒
41.
以醋酸锌和氨水为原料,结合并流沉淀和超声处理制备纳米氧化锌的前驱体乳液。再利用真空冷冻干燥方法得到前驱体,经过热处理得到纳米氧化锌(约15nm)。用正交试验方法分析了乳液制备工艺对其稳定性的影响,结果表明:分散剂加入量对前驱体乳液稳定性影响最大,合适的分散剂加入量为0.4%(体积分数)。 相似文献
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43.
对比研究了γ-甲基丙烯酰氧基丙基三甲氧基硅烷(MPTMS)与纳米ZnO的不同表面反应方法,制备了表面负载有活性基团-乙烯基的纳米ZnO,初步探讨了表面反应机理。试验表明:以水为分教利的反应方法在环保、节能方面具有不可替代的优越性。 相似文献
44.
通过熔融共混法制备出不同硅烷偶联剂(KH550,KH560)改性的nano-ZnO/HDPE复合材料,并考察了偶联剂及ZnO含量对复合材料性能的影响。结果表明:改性nano-ZnO对HDPE基体起到了明显的增强增韧的效果,当改性nano-ZnO含量为0.2%~0.5%时,复合材料的力学性能最好。此外,nano-ZnO在HDPE中起异相成核剂的作用,从而使体系的熔融温度、结晶温度和结晶度升高。经KH560处理的nano-ZnO/HDPE复合材料的力学性能和结晶性能均优于经KH550处理的nano-ZnO/HDPE复合材料的性能。 相似文献
45.
火焰喷涂尼龙1010/纳米ZnO复合涂层力学性能研究 总被引:2,自引:1,他引:2
为了探讨纳米ZnO(n-ZnO)对火焰喷涂尼龙1010涂层力学性能的影响,利用电子拉力机对火焰喷涂尼龙1010/n—ZnO复合涂层的力学性能及耐老化性能进行了测试。结果表明,当复合涂层配比为m(PA1010):m(n-ZnO)=100:1.5时,复合涂层综合性能较佳,涂层自拉伸强度为41.92MPa;涂层与基体结合强度为41.68MPa。提示纳米ZnO能够明显提高涂层与基体的结合强度,对涂层的自拉伸强度也有一定幅度的提高。 相似文献
46.
Assessment of UV-permeability in nano-ZnO filled coatings via high throughput experimentation 总被引:1,自引:0,他引:1
Michael S. Lowry David R. Hubble Amy L. Wressell Menas S. Vratsanos Frank R. Pepe Charles R. Hegedus 《Journal of Coatings Technology and Research》2008,5(2):233-239
The degree of UV protection afforded by nano-ZnO in a polyurethane/acrylic clear topcoat was investigated. The influence of
nano-ZnO concentration and dry film thickness on the optical properties (e.g., UV permeability and visible transmittance)
of the coating was probed using a library of 28 samples that were prepared by high throughput techniques. A model for predicting
the UV permeability of nano-ZnO filled coatings was developed and the nano-ZnO loading condition required to block >99% UV
radiation was determined to be 2.0 g/m2. This model can be used to assist in the development of coatings and other polymeric systems embedded with nano-ZnO to protect
the coating and underlying materials (i.e., substrate) from UV degradation.
相似文献
Charles R. HegedusEmail: |
47.
LLDPE/modified nano-ZnO composite films were prepared using LLDPE and KH550-modified nano-ZnO by melt blending and blowing. The research results indicated that the introduction of the modified nano-ZnO improved the mechanical properties of the LLDPE films, the maximum tensile strength and elongation at break were obtained at modified nano-ZnO content of 0.3 wt%. The composite films exhibited favorable antibacterial activity against Escherichia coli and Staphylococcus aureus. The low doped content of modified nano-ZnO in LLDPE matrix made the melt viscosity of the composites increase slightly, it was coincident with variation of the balance torque with the nano-ZnO content. 相似文献
48.
采用熔融共混方法制备线型低密度聚乙烯(LL-DPE)/二氧化钛(TiO2)/氧化锌(ZnO)三元纳米复合阻燃材料,通过场发射扫描电镜(FESEM)、红外(FTIR)及扫描电镜(SEM)对复合阻燃材料的微观形态及结构进行表征,证明共混形成的TiO2和ZnO纳米粒子在LLDPE基体复合阻燃材料中呈纳米级分散;对其力学性能的测试表明,三元纳米复合阻燃材料的拉伸断面趋于韧性化,当纳米粒子质量分数为3%时,与纯LLDPE相比,冲击强度提高约49%,拉伸强度提高约18%,断裂伸长率也有所增加。 相似文献
49.
将纳米ZnO作为氨基硅酮弹性体的催化剂,对真丝织物进行抗皱整理,整理后真丝织物的折皱回复角由200.12°提高到255.58°,且不影响织物手感,具有较好的耐洗性能. 相似文献
50.
On the zinc sorption by the Serbian natural clinoptilolite and the disinfecting ability and phosphate affinity of the exhausted sorbent 总被引:1,自引:0,他引:1
The Serbian natural zeolite is moderately effective in removing the zinc(II) ions from aqueous solutions. At 298 K the sorption capacity varies from 13 to 26% for the initial Zn(II) solution concentration of 100 and 600 mg Zndm(-3), respectively. The sorption isotherm at 298-338 K is best represented by the Langmuir model and the sorption kinetics by the pseudo-second-order model. The sorption involves a combination of film diffusion, intra-particle diffusion, and a chemical cation-exchange between the Na(+) ions of clinoptilolite and Zn(2+) ions. The sorption was found to be endothermic and spontaneous in the 298-338 K range. The exhausted sorbent can remove phosphate ions and it exhibits an excellent antibacterial activity towards Acinetobacter junii. By dehydration at about 500 °C it transforms to a ZnO-containing product featuring nano-sized wurtzite ZnO particles widespread over the clinoptilolite surface. 相似文献