In order to provide ultraviolet barrier, antifungal and antibacterial properties, nano-zinc oxide (ZnO) was added to lamellar zirconium phosphate (ZrP). The phosphate was synthesized via reaction of zirconium oxychlor...In order to provide ultraviolet barrier, antifungal and antibacterial properties, nano-zinc oxide (ZnO) was added to lamellar zirconium phosphate (ZrP). The phosphate was synthesized via reaction of zirconium oxychloride octahydrate and phosphoric acid following its chemical modification with Jeffamine and nano-ZnO. Diffractometric, morphological, thermal, structural and relaxometric evaluations were conducted. Fourier transform infrared spectroscopy (FTIR) revealed increase of the area between 4000 - 3000 cm<sup>-1</sup> due to the formation of ionic specie PO? <sup>+</sup>NH<sub>3</sub>-[C-(H)(CH<sub>3</sub>)-CH<sub>2</sub>-O-(C-(H)(CH<sub>3</sub>)-CH<sub>2</sub>-O)<sub>8</sub>-(CH<sub>2</sub>-CH<sub>2</sub>-O-CH<sub>3</sub>)] and nano-ZnO particles. Wide-angle X-ray diffraction indicated that intercalation of Jeffamine was successful. Thermogravimetry confirmed that nano-ZnO particle forced the expulsion of Jeffamine outside ZrP galleries. Scanning electron microscopy evidenced the Jeffamine intercalation and sample heterogeneity. Hydrogen molecular relaxation indicated the increase of molecular rigidity owing to the formation of ionic specie and the addition of nano-ZnO particles. It was postulated that a multifunctional and miscellaneous material constituted by as prepared ZrP, some delaminated ZrP platelets and nano-ZnO particles was achieved. The material has potential for usage as filler in polymeric composites.展开更多
目的研究比较纳米银和纳米锌2种材料的抑菌效果和对虾的保鲜效果。方法以G^+和G^-为受试菌种,采用纸片扩散法研究纳米银和纳米锌的高、中、低浓度对细菌的抑菌效果。在此基础上,以总挥发性盐基氮(total volatile base nitrogen,TVBN)、...目的研究比较纳米银和纳米锌2种材料的抑菌效果和对虾的保鲜效果。方法以G^+和G^-为受试菌种,采用纸片扩散法研究纳米银和纳米锌的高、中、低浓度对细菌的抑菌效果。在此基础上,以总挥发性盐基氮(total volatile base nitrogen,TVBN)、菌落总数、感官、色度等为指标,研究其应用于南美白对虾4℃贮藏保鲜效果。结果纳米银对受试菌种的抑菌效果明显优于纳米锌;纳米银对G^+的抑菌效果优于对G^-的抑菌效果;以TVBN限值为指标,纳米银处理组较对照组在4℃下保存时间可延长48 h。结论纳米银可作为虾类保鲜材料开发的抑菌增效剂。展开更多
Fused quartz ceramic was prepared using high purity fused quartz powder as starting material,separately introducing 1%,2% and 3% （in mass,the same hereinafter） nano-ZnO or nano-Y203 as additive,molding at 50 MPa,fir...Fused quartz ceramic was prepared using high purity fused quartz powder as starting material,separately introducing 1%,2% and 3% （in mass,the same hereinafter） nano-ZnO or nano-Y203 as additive,molding at 50 MPa,firing in reduction atmosphere at 1 300,1 350 and 1 400 ℃ for 1 h,respectively.Apparent porosity and cold modulus of rupture were tested and fracture morphology was analyzed by SEM.The results show that adding nano-ZnO or nano-Y2O3 obviously improves sintering of fused quartz; adding nano-ZnO enhances modulus of rupture and decreases apparent porosity; the optimum addition of nano-Y2O3 as sintering aid of fused quartz is 2%.展开更多
随着工业的发展,环境保护和可持续发展成为人们不得不考虑的问题,其中染料工业废水的降解是一个典型问题。文章主要介绍了利用自制纳米锌与超声波协调作用对活性黑染料进行降解,并考察了纳米锌加入量、双氧水加入量、超声波震荡时间等...随着工业的发展,环境保护和可持续发展成为人们不得不考虑的问题,其中染料工业废水的降解是一个典型问题。文章主要介绍了利用自制纳米锌与超声波协调作用对活性黑染料进行降解,并考察了纳米锌加入量、双氧水加入量、超声波震荡时间等对活性黑染料降解率的影响。实验结果表明,纳米锌加入量为30 mg、双氧水加入量为0.6 m L、超声波震荡时间为30分钟时,活性黑染料降解效果较好,降解率可达95.3%。展开更多
Common zinc oxide and nano-zinc oxide were used to composite natural rubber separately. Their vulcanization profiles and TGA curves showed the composite of natural rubber with nano-znic oxide possessed higher effectiv...Common zinc oxide and nano-zinc oxide were used to composite natural rubber separately. Their vulcanization profiles and TGA curves showed the composite of natural rubber with nano-znic oxide possessed higher effective crosslinking ratio, then, the improved thermal stability and mechanical properties.展开更多
文摘In order to provide ultraviolet barrier, antifungal and antibacterial properties, nano-zinc oxide (ZnO) was added to lamellar zirconium phosphate (ZrP). The phosphate was synthesized via reaction of zirconium oxychloride octahydrate and phosphoric acid following its chemical modification with Jeffamine and nano-ZnO. Diffractometric, morphological, thermal, structural and relaxometric evaluations were conducted. Fourier transform infrared spectroscopy (FTIR) revealed increase of the area between 4000 - 3000 cm<sup>-1</sup> due to the formation of ionic specie PO? <sup>+</sup>NH<sub>3</sub>-[C-(H)(CH<sub>3</sub>)-CH<sub>2</sub>-O-(C-(H)(CH<sub>3</sub>)-CH<sub>2</sub>-O)<sub>8</sub>-(CH<sub>2</sub>-CH<sub>2</sub>-O-CH<sub>3</sub>)] and nano-ZnO particles. Wide-angle X-ray diffraction indicated that intercalation of Jeffamine was successful. Thermogravimetry confirmed that nano-ZnO particle forced the expulsion of Jeffamine outside ZrP galleries. Scanning electron microscopy evidenced the Jeffamine intercalation and sample heterogeneity. Hydrogen molecular relaxation indicated the increase of molecular rigidity owing to the formation of ionic specie and the addition of nano-ZnO particles. It was postulated that a multifunctional and miscellaneous material constituted by as prepared ZrP, some delaminated ZrP platelets and nano-ZnO particles was achieved. The material has potential for usage as filler in polymeric composites.
文摘目的研究比较纳米银和纳米锌2种材料的抑菌效果和对虾的保鲜效果。方法以G^+和G^-为受试菌种,采用纸片扩散法研究纳米银和纳米锌的高、中、低浓度对细菌的抑菌效果。在此基础上,以总挥发性盐基氮(total volatile base nitrogen,TVBN)、菌落总数、感官、色度等为指标,研究其应用于南美白对虾4℃贮藏保鲜效果。结果纳米银对受试菌种的抑菌效果明显优于纳米锌;纳米银对G^+的抑菌效果优于对G^-的抑菌效果;以TVBN限值为指标,纳米银处理组较对照组在4℃下保存时间可延长48 h。结论纳米银可作为虾类保鲜材料开发的抑菌增效剂。
基金the financial support of National Natural Science Foundation of China ( 51072046)
文摘Fused quartz ceramic was prepared using high purity fused quartz powder as starting material,separately introducing 1%,2% and 3% （in mass,the same hereinafter） nano-ZnO or nano-Y203 as additive,molding at 50 MPa,firing in reduction atmosphere at 1 300,1 350 and 1 400 ℃ for 1 h,respectively.Apparent porosity and cold modulus of rupture were tested and fracture morphology was analyzed by SEM.The results show that adding nano-ZnO or nano-Y2O3 obviously improves sintering of fused quartz; adding nano-ZnO enhances modulus of rupture and decreases apparent porosity; the optimum addition of nano-Y2O3 as sintering aid of fused quartz is 2%.
文摘随着工业的发展,环境保护和可持续发展成为人们不得不考虑的问题,其中染料工业废水的降解是一个典型问题。文章主要介绍了利用自制纳米锌与超声波协调作用对活性黑染料进行降解,并考察了纳米锌加入量、双氧水加入量、超声波震荡时间等对活性黑染料降解率的影响。实验结果表明,纳米锌加入量为30 mg、双氧水加入量为0.6 m L、超声波震荡时间为30分钟时,活性黑染料降解效果较好,降解率可达95.3%。
文摘Common zinc oxide and nano-zinc oxide were used to composite natural rubber separately. Their vulcanization profiles and TGA curves showed the composite of natural rubber with nano-znic oxide possessed higher effective crosslinking ratio, then, the improved thermal stability and mechanical properties.
