The Preparation Of Multi-walled Carbon Nanotubes Loading Antibacterial Agent And The Application In PET Fiber

With more requirements for the surviving environment, how to live a green and healthy life has become a daily issue for us. While, there exist plenty of bacteria in our living social environment, that jeopardizes our healthy life. Taking all above into consideration, the antimicrobial-fiber products increasingly prevail among the people. Given that the inorganic antibacterial agents possess antibacterial spectrum, and that it has many merits such as long-lasting and heat-resistant characteristics, as well it won't generate the resistance to other components easily, this antibacterial fiber material was put into the widespread use. On account of the CNTs and other brilliant physical and chemical property and function, antimicrobial-fiber is regarded as good additive. PET is the most prevalent synthetic fiber, so we CNTs will be carrier of the Ag/MWCNTs Antibacterial agent. Ag/MWCNTs antibacterial agent and we researched the significance of this fiber's employment in the PET fiber.In this research, the MWCNTs was used as carrier and AgNO3 solution, the reactive fluid, through the chemical absorption approached to producing the Ag/MWCNTs antbacterial agent. We mianly investigated the method and process of the production of the Ag/MWCNTs antibacterial agent and had the concrete research of the structure and performance of the Ag/MWCNTs, meanwhile we tested the antibacterial performance of some samples by the inhibition zone method. The Ag/MWCNTs was applied as the functional material and we processed the Ag/MWCNTs antibacterial PET masterbatch with the double helix stem extruder. We also produced the Ag/MWCNTs antibacterial PET fibre in the method of melt blending method. The thesis mainly researched the processing method of the antimicrobial PET fiber and possible structural and mechanics influence of the tentative additives, which were the different masterbatches. We examined the PET fiber's antimicrobial performance in the oscillation flask method.The metal ions in the Ag/MWCNTs antibacterial agent was quantified with the ICP-MS. We observed PET fiber's appearance and features through SEM, and PET fiber's sample structure through the HRTEM, XRD and FT-IR. The samples'antibacterial function can be examined in the bacteriostatic annulus method or MIC.According to the above research, we mainly drew several conclusions as below:1 The Ag/MWCNTs antibacterial agent's most suitable processing method was:reactive fluid density:0.2mol/L, pH value:6-7, temperature:65℃, reactive hours:5.5h.2 Colon bacillus MIC of the Ag/MWCNTs antibacterial agent with 0.68%(wt) Ag was 30ug/ml to E. coli, the MIC of Staphylococcus aureus was 15ug/mL.3 The processing method of the Ag/MWCNTs antibacterial PET fiber was: the temperature of the first, second, third and fourth bacillus area was respectively 278℃,286℃,290℃,292℃, elbow pipe's temperature was 298℃The temperature of the cabinet temperature was 305℃. The temperature of hot roll 1,2,3 is individually 90℃,115℃130℃. The melt temperature was 293.6℃. The Ag/MWCNTs antibacterial agent dispersed properly in the PET matrix, and PET matrix possessed the beneficial compatibility.4 When the additive weight of the Ag/MWCNTs antibacterial PET fiber reached 1%, the antibacterial PET fiber would take the position of the best antibacterial performance and spinnability, as well as the best structure and mechanics function.