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Development of Antibacterial and Antistatic Acrylic Acid Coating

Author: TanSheng
Tutor: YangBaoPing；CuiJinFeng
School: Lanzhou University of Technology
Course: Chemical processes
Keywords: Quaternary ammonium salt Antimicrobial coatings Antistatic coatings Antibacterial agents Antistatic agent
CLC: TQ637
Type: Master's thesis
Year: 2011
Downloads: 108
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Abstract


Traditional antimicrobial coatings and antistatic coatings in different resin binder add inorganic, organic and complex with the antimicrobial agent and an antistatic agent, in order to achieve the effect of antibacterial and anti-static. Its antimicrobial properties and antistatic properties due to the slow release or precipitation of these fillers in the paint binder, with the use of time in gradually weakened, and the precipitated heavy metals, such as silver, copper ions and the like on the environment caused a certain degree of pollution. The antimicrobial coatings and antistatic coatings of the structure type is to have a group of the antibacterial or anti-static antibacterial group is connected by a certain chemical reaction to bond in a resin binder polymer, this polymer as the base material of the antimicrobial coating and antistatic coatings. Development of antimicrobial coatings and antistatic coatings of the structure type has a very important significance, through chemical bonds having a antibacterial or antistatic properties of the group is connected to the resin base material, the binder resin having antibacterial or conductivity, thereby preparing antimicrobial coatings and antistatic coatings, antibacterial and antistatic properties are more durable and effective. The antistatic agent of the quaternary ammonium antimicrobial agent applications is very wide, such as benzalkonium chloride (dodecyl dimethyl benzyl ammonium chloride), widely used as an efficient fungicide, an antistatic agent SN, antistatic agents TM widely used as an antistatic agent in the antistatic coating. In recent years, the study of the polymeric quaternary ammonium more, including the synthesis of the different structure of quaternary ammonium salt monomers antimicrobial research, and its copolymerization polymer antimicrobial studies, studies show that the quaternary ammonium-containing polymers high The molecule also has good antibacterial properties. However, polymeric quaternary ammonium salt antistatic less. Synthesized a quaternary ammonium monomers having antibacterial properties acryloyloxyethyl dimethylethyl the bromide (PEDAB), the compound is a white solid, MF the C 9 H < sub> 18 O 2 NBr, molecular weight 253g/mol, melting range :283-285 ° C, can easily absorb moisture, is highly soluble in water, ethanol, heating can be dissolved in n-butyl the alcohol, does not dissolve in the small polar solvent such as ether. Through experiments the synthetic antibacterial monomer PEDAB the optimum conditions, the reaction temperature is 40 ° C, the solvent is a volume ratio of diethyl ether-acetone mixed solvent, the amount of substance of the raw material DMAEA and dibromoethane ratio of 1:2, PEDAB yield rate of 68.2%. The use of modern analytical techniques to characterize the structure, synthesis of functional monomers test results show that this quaternary ammonium functional monomer has a good antibacterial antibacterial properties. To the functional monomer PEDAB and methacrylic acid methyl ester (MMA), butyl methacrylate (BMA) and butyl acrylate (BA), radical polymerization, having the antibacterial properties of the quaternary ammonium group by radical polymerization reaction in the form of the chemical bond is connected to the acrylic resin polymer chain. The optimum conditions for polymerization: n-butanol as the solvent, the polymerization temperature was 100 ° C, the initiator agent (BPO) is added in an amount of 1% to give a pale yellow copolymer, with the polymerization process featured single the increase of the volume, the color of the copolymer gradually becomes deeper. Functional monomers involved in the polymerization reaction may be determined by infrared contrast and DSC analysis on the the synthesis PEDAB its copolymers. This resin with an amount of butyl acetate with a filler material to the preparation of coatings. Formulated coating antibacterial antistatic detected, the experimental results show that in order to obtain a coating having a good antibacterial antistatic properties. By the detection of the antimicrobial properties of polymers, show that with the increase in the amount of the polymerization process PEDAB Polymers on Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Aspergillus niger antibacterial effect more remarkable. When PEDAB reached 8%, the antibacterial rate reached 99%. Determination of the coating surface resistivity ρ s , when the functional monomer in an amount of 6%, the surface resistivity of the coating film reached 2.2 × 10 5 Ω, With the increase of the amount of the functional monomer, the surface resistivity of the coating film is not significantly changed. Synthesis of functional monomers structure containing double bonds, radical copolymerization with other acrylic monomers, this polymer as the base material, formulated antibacterial antistatic coatings. The test results show that the structure antimicrobial antistatic coating obtained by this method has good antibacterial antistatic fundamentally overcome traditional antimicrobial coatings and antistatic coatings produced by the use of antimicrobial agents and antistatic agents. While making long-lasting antibacterial effect of antistatic antistatic coatings formulated antibacterial, highly scientific research and application value.

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