Dissertation > Excellent graduate degree dissertation topics show

The Preparation of Ag/TiO2 Nanoparticles and It’s Application in Antibacterial Plastics

Author: LinFeng
Tutor: TangJianXin
School: Hunan University
Course: Biomedical Engineering
Keywords: Nano-Ag Nano-TiO2/Ag Microemulsion Antibacterial PP Plastic Antibacterial property
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 164
Quote: 0
Read: Download Dissertation

Abstract


Antibacterial plastic is a new kind of functional plastic. It is due to be filled with antibacterial agents that the material has the antibacterial activity. Because the antibacterial capacity of antibacterial plastic is long,steady,economical and convenient , it is widely used in medical appliances, chemical building materials, catering equipment, household appliances, telephones, telecommunications and plastic packaging materials of high health requirements, etc. Thus, it has a very broad market prospects. Considering the above reasons, our research focused on“preparation of TiO2/Ag nanoparticles and its application on antibacterial plastics”,and the thesis consists of the following contents:1.Silver nanoparticles were synthesized in water-in-oil micro emulsion using silver nitrate solubilized in the water core of a microemulsion as source of silver ions , ascorbic acid solubilized in the water core of another one as reducing agent , isooctane as the continuous phase , and sodium bis （2-ethylhexyl） sulfosuccinate as the surfactant. The influence of AgNO3 concentration, ascorbic acid concentration and the molar ratios of water to surfactant （W） in microemulsionon on the silver nanoparticles have been investigated by TEM, UV-Vis spectra and Zetasizer Nano. As a result ,the silver nanoparticles possessed good dispersivity, and their diameters were about 10 nm when the concentration of AgNO3 was 0.2 mol / L, the concentration of ascorbic acid was 0.2 mol / L and the water core radius （W） was 10. The antibacterial property of the silver nanoparticles indicated the E.coli was completely killed when the concentration of the silver nanoparticles was 10μg/mL.2. TiO2/Ag colloidal were synthesized in water-in-oil microemulsion use using silver nitrate and TiO2 solubilized in the water core of a microemulsion as precursor, ascorbic acid solubilized in the water core of another one as reducing agent, isooctane as the continuous phase, and sodium bis （2-ethylhexyl） sulfosuccinate as the surfactant. 1)TiO2/Ag colloidal what was prepared at room temperature have good dispersion,and the average diameter of Ag was 20 nm. 2) The antibacterial activity of TiO2 can be greatly improved by adding nano-silver, the TiO2/Ag antibacterial material which is made by 3% Ag-TiO2 achieve the optimal antibacterial performance. 3) The antibacterial activity of TiO2/Ag can be influenced by the size of TiO2 particles, and TiO2/Ag antibacterial material which was made by smaller size of TiO2 particles has better antibacterial properties. 4) TiO2/Ag antibacterial material has good anti-bacterial persistence. 3. Antibacterial PP plastic were prepared by using TiO2/Agantibacterial material. After surface modification by silane coupling agent, TiO2/Ag antibacterial powder which were uniformly distributed in the PP concentrate is well comparable with PP plastic. The results showed that,the antibacterial PP concentrate have excellent and long-acting antibacterial activity,also the antibacterial rates of PP concentrate were all above 92% against Escherichia. Coli and StaPhylococcus aureus. Compared with normal PP plastic, the tensile strength, notched impact strength and flexural strength of antibacterial PP plastic are little effected.

Related Dissertations

  1. Absorption of VOCs by Solubilization with Nonionic Surfactants and Microemulsions,X701
  2. New multi- color fluorescent nano- biological materials and research,TB383.1
  3. Research on the Surface-Initiated Polymerization and Application,O631.5
  4. Study on Preparation and Functionalization of Self-cleaning Glass,TQ171.7
  5. Preparation of Aardrhubarb Antimicrobial and Application in Cotton Fabrics,TS195.55
  6. Antibacterial Composite of Natural Rubber/Bombyx Mori Silk Fibroin: Preparation and Properties,R318.08
  7. Research on Pathway of Cyclohexanone Ammoximation with Microemulsions,O621.25
  8. Preparation of HBP-HTC and Its Modification on B.mori Silk,TS195.6
  9. Layered compounds K_2Ln_2Ti_3O_ (10) and its complex preparation and photocatalytic activity,TB34
  10. Study on the Preparation of Lidocaine Microemulsion and Its Percutaneous Penetration in Vitro,R94
  11. Extraction of Light Rare Earth Metals Using Nonionic Water-in-Oil Microemulsion in Hollow Fiber Membrane,TF845
  12. Study on the Synthesis and Application of Polyurethane-chromium(Ⅲ) Complexes Tanning Agent,TS529.2
  13. Preparation and Characterization of Ceria and Cerium Trifluoride Nanoparticles,O614.332
  14. Studies on Preparation and Performance of Microemulsified Oil,TG331
  15. Study on Synthesis and Properties of Rb-Co-Fe Prussian Blue Analogous Nanomaterials,TB383.1
  16. Clinical Research on the Treatment of Acute Cerebral Ischemic Stroke with NAO-QING Nasal Spray Microemulsion,R277.7
  17. The microemulsions prepared performance study of low - dimensional nanomaterials,TB383.1
  18. Study on Synthsis, Mechanism and Properties of Micro-/nano-Materials Tungstate,TB383.1
  19. Synthesis of Maleic Polymerizable Emulsifiers and Application in Miniemulsion/Microemulsion Polymerization,TQ316.334
  20. Studies on Oleanolic Acid Self-Microemulsion Drug Delivery System,R94
  21. The Study of β-Carotente Microemulsion Agentia,TQ427

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile