Research On The Finishing Technology Of Quaternary Ammonium Salt Antibacterial Agent M On Cellulose

In this paper, we selected the quaternary ammonium salt antibacterial agent (CH3-(CH2)n-R-(CH2)n-N(CH3)3+CH3SO4") which was provided by the catalyzing and synthesizing laboratory of Lyon first University, combining the character of cellulose, we did the antibacterial treating on the cotton, choosing E.Coli (ATCC8739) and S.Aureus ( ATCC65358 ) as the testing bacterium, the finished fabrics were tested.Analyzing testing methods in common use AATCC- 100 and Japanese Industrial Standard JIS L 1902: 2002, which exist some shortages, we improved the method JIS L 1902: 2002, making its experimental conditions accord to the real dress and named it "ten times dilution". At the same time, putting forward new calculating method for antibacterial efficacy, only one calculating result can judge the sample is bactericidal or bacteriostastic. The results proved this test method has good stability, the testing results have good coincidence with Pallchek Luminometer System.For the sake of making cotton possessing antibacterial activity of specific durable levels, two methods were tried to treat the fabric. One is the traditional method, at first, deal with sodium hydroxide, then, with antibacterial agent; the other is the contrary method to the former, at first, deal with antibacterial agent, then, with sodium hydroxide. The results showed that the contrary method is better than the traditional under same treating conditions, the contrary method has good durability. The finished fabric has well antibacterial efficacy to E.Coli and S.Aureus, the antibacterial efficacy to latter is better the formerThere are many process conditions which can influence antibacterial efficacy, in this paper, dosage of antibacterial agent M (o.w.f), treating time, treating temperature, concentration of sodium hydroxide, treating time and temperature were studied. The results showed that dosage of antibacterial agent M is important to antibacterial efficacy, the treating time and temperature is unimportant, through orthotropic experiment, this result was validated and found the detailed process parameters; concentration of sodium hydroxide, treatingtime and temperature more greatly influence contrary method than the traditional. In order to make antibacterial agent fully permeate, using wetting agent L as the solvent of antibacterial agent, the results showed that it can improve antibacterial efficacy.In this paper, we researched the antibacterial activity of the fabric to other bacterium and the antibacterial activity after dyeing; tested and evaluated the whiteness, handle, strength, water vapor transmission rate, air transmission rate and dye-uptake, dye fixing rate, some dyeing fastness. The results indicated that the antibacterial activity of treating cotton is broad-spectrum; the antibacterial efficacy is debased after dyeing, but only a little, the treated fabric still can meet the antibacterial require; after antibacterial finish, the whiteness of the fabric is decreased, the handle is improved, the strength is increased and dye-uptake, dye fixing rate both are increased, water vapor transmission rate, air transmission rate and some dyeing fastness are influenced a little.The contrary method can greatly improve antibacterial efficacy, thinking from the aspects of economy and efficacy, dosage of antibacterial agent M is chosen 5%, treating time is 30min; treating temperature is room temperature; the concentration of hydroxide sodium is 1.6%, treating time is 20min, treating temperature is room temperature are the most reasonable process conditions.