中空微球的制备及其超疏水和抗菌性的研究
发布时间：2019-03-05 09:08
【摘要】：本文针对具有中空结构的微球在超疏水方面和抗菌方面实行了探讨。利用超疏水能够减少细菌粘附的功能,将其与纳米银相结合,制备出了比较好的抗菌剂。(1)使用浓硫酸作为磺化剂,通过改变浓硫酸的用量及反应时间,对磺化聚苯乙烯的磺化度及微球形貌进行了探讨。结果表明,浓硫酸的量如果较少或者较多都无法得到形貌较好的磺化聚苯乙烯微球,只有使用适量才会得到形貌较好的磺化聚苯乙烯微球。但是对于磺化聚苯乙烯的磺化度来说,当浓硫酸的使用体积逐渐增加,磺化聚苯乙烯的磺化度会随之提高。而反应时间于磺化聚苯乙烯的形貌也存在适当的作用。反应时间过短,会导致磺化聚苯乙烯团聚粘连。反应时间太长,将导致磺化聚苯乙烯变形。因此,经过改变反应时间及浓硫酸的用量能够获得所需要的形貌较好的磺化了的聚苯乙烯粒子。(2)通过分步法合成了单分散性好,包覆均匀的聚苯乙烯／银复合粒子。首先通过分散聚合的手段合成粒径均一,单分散性好的聚苯乙烯粒子。然后对其表面改性使其表面带有负电,加入一定量的硝酸银,通过静电吸附作用在改性的聚苯乙烯球的表面沉积银离子,通过还原剂,把纳米银包覆在聚苯乙烯微球的外部。通过改变硝酸银的量,从而获得了不同形貌的聚苯乙烯／银复合粒子,从而得出了硝酸银的最佳加入量为0.32 g。(3)采用二氧化硅对聚苯乙烯／银／二氧化硅复合粒子进行了包覆,并且证明了聚苯乙烯／银／二氧化硅复合粒子内部存在纳米银,从而使其拥有一定抗菌性,拥有优秀的使用前景。(4)对聚苯乙烯／银／二氧化硅复合粒子进行了超疏水的改性,从而使其同时具有抗菌性和超疏水性。由于超疏水表面能够减少细菌的粘附,进一步增强了改性的聚苯乙烯／银／二氧化硅复合粒子抗菌能力。从实验结果来看,我们所制得的疏水改性的聚苯乙烯/银／二氧化硅复合粒子具有很好的超疏水性能。(5)采用样板划线的方式对聚苯乙烯／二氧化硅复合粒子和疏水改性过的聚苯乙烯／二氧化硅复合粒子进行了细菌数目的测定。发现疏水改性过的聚苯乙烯／二氧化硅复合粒子比聚苯乙烯／二氧化硅复合粒子的抗菌性能要好。
[Abstract]:In this paper, the superhydrophobic and antibacterial aspects of hollow microspheres are discussed. Superhydrophobic can reduce the adhesion of bacteria and combine it with silver nanoparticles to prepare a better antibacterial agent. (1) using concentrated sulfuric acid as sulfonation agent, by changing the amount of concentrated sulfuric acid and reaction time, The sulfonation degree and microsphere morphology of sulfonated polystyrene were discussed. The results showed that the sulfonated polystyrene microspheres with good morphology could not be obtained if the amount of concentrated sulfuric acid was less or more, and the sulfonated polystyrene microspheres with good morphology could be obtained only when proper amount of sulfuric acid was used. However, for the sulfonation degree of sulfonated polystyrene, the sulfonation degree of sulfonated polystyrene will increase with the increase of the use volume of concentrated sulfuric acid. The reaction time also plays an appropriate role in the morphology of sulfonated polystyrene. Reaction time is too short, will lead to sulfonated polystyrene agglomeration adhesion. Reaction time is too long, will lead to sulfonated polystyrene deformation. Therefore, the sulfonated polystyrene particles with good morphology can be obtained by changing the reaction time and the amount of concentrated sulfuric acid. (2) the monodisperse polystyrene / silver composite particles with good monodispersity and uniform coating were synthesized by step-by-step method. Firstly, uniform and monodisperse polystyrene particles were synthesized by dispersion polymerization. Then the surface was modified to make the surface negatively charged, adding a certain amount of silver nitrate, depositing silver ions on the surface of the modified polystyrene sphere by electrostatic adsorption, and coating nano-silver on the outer surface of the polystyrene microspheres by reducing agent. Polystyrene / silver composite particles with different morphologies were obtained by changing the amount of silver nitrate. The optimum addition of silver nitrate was 0.32 g 路(3) the polystyrene / silver / silica composite particles were coated with silica. It has also been proved that nano-silver exists in polystyrene / silver / silica composite particles, so that it has certain antibacterial properties. (4) the polystyrene / silver / silica composite particles were superhydrophobic to make them have both antibacterial and hydrophobic properties at the same time. The antibacterial ability of the modified polystyrene / silver / silica composite particles was further enhanced because the superhydrophobic surface could reduce the bacterial adhesion. Judging from the results of the experiment, The hydrophobically modified polystyrene / silver / silica composite particles prepared by us have good superhydrophobic properties. (5) Polystyrene / silica composite particles and hydrophobic particles have been modified by template marking method. The number of bacteria in polystyrene / silica composite particles was determined. It was found that the hydrophobic modified polystyrene / silica composite particles had better antibacterial properties than polystyrene / silica composite particles.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34;O632.13
[Abstract]:In this paper, the superhydrophobic and antibacterial aspects of hollow microspheres are discussed. Superhydrophobic can reduce the adhesion of bacteria and combine it with silver nanoparticles to prepare a better antibacterial agent. (1) using concentrated sulfuric acid as sulfonation agent, by changing the amount of concentrated sulfuric acid and reaction time, The sulfonation degree and microsphere morphology of sulfonated polystyrene were discussed. The results showed that the sulfonated polystyrene microspheres with good morphology could not be obtained if the amount of concentrated sulfuric acid was less or more, and the sulfonated polystyrene microspheres with good morphology could be obtained only when proper amount of sulfuric acid was used. However, for the sulfonation degree of sulfonated polystyrene, the sulfonation degree of sulfonated polystyrene will increase with the increase of the use volume of concentrated sulfuric acid. The reaction time also plays an appropriate role in the morphology of sulfonated polystyrene. Reaction time is too short, will lead to sulfonated polystyrene agglomeration adhesion. Reaction time is too long, will lead to sulfonated polystyrene deformation. Therefore, the sulfonated polystyrene particles with good morphology can be obtained by changing the reaction time and the amount of concentrated sulfuric acid. (2) the monodisperse polystyrene / silver composite particles with good monodispersity and uniform coating were synthesized by step-by-step method. Firstly, uniform and monodisperse polystyrene particles were synthesized by dispersion polymerization. Then the surface was modified to make the surface negatively charged, adding a certain amount of silver nitrate, depositing silver ions on the surface of the modified polystyrene sphere by electrostatic adsorption, and coating nano-silver on the outer surface of the polystyrene microspheres by reducing agent. Polystyrene / silver composite particles with different morphologies were obtained by changing the amount of silver nitrate. The optimum addition of silver nitrate was 0.32 g 路(3) the polystyrene / silver / silica composite particles were coated with silica. It has also been proved that nano-silver exists in polystyrene / silver / silica composite particles, so that it has certain antibacterial properties. (4) the polystyrene / silver / silica composite particles were superhydrophobic to make them have both antibacterial and hydrophobic properties at the same time. The antibacterial ability of the modified polystyrene / silver / silica composite particles was further enhanced because the superhydrophobic surface could reduce the bacterial adhesion. Judging from the results of the experiment, The hydrophobically modified polystyrene / silver / silica composite particles prepared by us have good superhydrophobic properties. (5) Polystyrene / silica composite particles and hydrophobic particles have been modified by template marking method. The number of bacteria in polystyrene / silica composite particles was determined. It was found that the hydrophobic modified polystyrene / silica composite particles had better antibacterial properties than polystyrene / silica composite particles.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB34;O632.13
【相似文献】
相关期刊论文 前10条
1 ;可溶性聚苯的研究[J];塑料工业;1975年04期
2 ;聚苯撑发展概况[J];涂料工业;1976年01期
3 ;聚苯砜醚应用简介[J];工程塑料应用;1979年04期
4 彭远东;;国外聚苯撑合成方法的进展[J];云南化工技术;1982年01期
5 柳方;又一种新型高分子化合物——聚苯d愌鮗J];化学世界;1965年04期
6 ;聚苯d愂髦芯，
本文编号：2434750
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2434750.html
