核孔膜在饮用水处理技术中的应用基础研究

发布时间：2018-03-25 04:02

本文选题：核孔膜　切入点：双锥型孔道　出处：《天津工业大学》2017年硕士论文

【摘要】：利用兰州重离子加速器提供的25MeV·u~(-1) ~(86)Kr~(26+)离子辐照厚度为12μm-25μm 的聚对苯二甲酸乙二酯(Poly(ethylene terephthalate),PET)薄膜,注量为 2×10~5ions·cm~(-2)、1×10~6ions·cm~(-2)、1.5×10~7ions·cm~(-2)和 5×10~7ions·cm~(-2)等。将辐照后的PET薄膜浸入不同温度、浓度的NaOH溶液蚀刻,制得不同孔径大小和不同孔型的核孔膜样品。分析了测厚法、光学显微镜观察法和泡点法三种孔径测量法的优劣。通过实验和模拟针对直筒孔型和双锥孔型样品进行过滤效果和污染程度比较,并分析检验过滤后水样的细菌含量。结果表明,对于孔径小于11μm的纳米孔径核孔膜,适合利用泡点分析法测量有效截留孔径,测量误差小于5%;对于孔径大于3μm的微米孔径或直筒孔核孔膜,优先选择光学显微镜观察法测量表面孔径,测量误差小于10%。与常规孔道相比,双锥型孔道在相同条件下可大大增加液体的通量,提高了过滤速率。并且根据理论分析,其抗污染能力也较强。内径450nm的核孔膜不仅能分离水样中的大颗粒物,有效降低水样的色度和浊度,还能有效分离水样中绝大部分细菌,说明450nm的核孔膜可以将细菌完全分离。这对医疗卫生等领域有非常重要的作用。
[Abstract]:The irradiated PET thin films with a thickness of 12 渭 m ~ 25 渭 m were irradiated by the 25MeV U ~ ((1) ~ (1)) ~ (86) K ~ ((1)) K ~ ((1)) ~ ((1)) and ~ (5 脳 10~7ions) ~ (2) ~ (5 脳 10~7ions) ~ (-1) ~ (1 脳 10~6ions) ~ (1 脳 10~6ions) ~ (1 脳 10~6ions) ~ (1 脳 10~6ions) ~ (-1) and 5 脳 10~7ions ~ (2) ~ (2) ~ (-1) ~ 1 脳 10~6ions ~ (1.5 脳 10~7ions) ~ (-1) ~ (-1) ~ 1 脳 10~6ions ~ (-1) ~ (1 脳 10~7ions) ~ (2)) respectively. The irradiated PET films were etched in NaOH solution at different temperatures and concentrations. The samples of nuclear porous membranes with different pore sizes and different pore types were prepared. The thickness measurement method was analyzed. The advantages and disadvantages of three kinds of aperture measurement methods, optical microscope observation method and bubble point method, were compared by experiments and simulations for the filtration effect and pollution degree of straight tube and double cone hole samples. The bacterial content of the filtered water sample was analyzed and tested. The results showed that the effective interception pore size could be measured by bubble point analysis for the nuclear pore membrane with nanometer pore size less than 11 渭 m. The measurement error is less than 5. For micrometer aperture or straight tube core pore membrane with pore diameter greater than 3 渭 m, optical microscope observation method is preferred to measure surface pore diameter. The measurement error is less than 10. Compared with conventional pore channel, the measurement error is less than 10. Under the same conditions, the bipyramidal channel can greatly increase the flux of liquid and increase the filtration rate. According to the theoretical analysis, its anti-pollution ability is also strong. The nuclear pore membrane with inner diameter 450nm can not only separate the large particles in the water sample, but also increase the filtration rate. It can effectively reduce the color and turbidity of water samples, and can also effectively isolate most of the bacteria in water samples, which indicates that the nuclear pore membrane of 450nm can completely separate bacteria, which plays a very important role in the field of medical treatment and hygiene.
【学位授予单位】：天津工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ028.8;TU991.2

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