本文選題：PDMS + 復(fù)合膜�。� 參考：《長(zhǎng)春工業(yè)大學(xué)》2016年碩士論文

【摘要】：滲透汽化技術(shù)是膜分離技術(shù)一個(gè)重要組成部分,近些年來逐漸成為一種新型的分離技術(shù)。安全、高效、分離過程中不引入其他污染物質(zhì)是滲透汽化技術(shù)最鮮明的特點(diǎn),因此該技術(shù)成為了21世紀(jì)最有發(fā)展前景的膜技術(shù)之一。本文先以氫氟酸為表面處理劑對(duì)硅橡膠(PDMS)膜進(jìn)行表面刻蝕改性,增加膜表面粗糙度。刻蝕后的PDMS復(fù)合膜采用DSC、FT-IR、SEM及水接觸角對(duì)其刻蝕后的熱穩(wěn)定性、表面形貌及疏水性進(jìn)行表征分析;研究了分離乙醇/水體系時(shí)操作條件(體系中濃度、溫度及滲透壓力)對(duì)PDMS刻蝕膜分離性能的影響。然后以納米聚四氟乙烯(n-PTFE)PDMS,經(jīng)表面淋洗制備了水砂石型PDMS復(fù)合膜。運(yùn)用SEM、DSC、FT-IR、XRD等表征方法研究填充后PDMS膜的熱穩(wěn)定性、形貌以及結(jié)構(gòu)。采用質(zhì)量比為1:10的n-PTFE-PDMS填充膜對(duì)常見制膜廢水三元體系(DMAC、氯仿水溶液)進(jìn)行了分離,通過改變料液溫度、濃度以及流速對(duì)填充膜滲透汽化性能的影響進(jìn)行了研究。最后通過添加羥基硅油改性的疏水性納米白炭黑(SiO_2),制備納米白炭黑改性PDMS復(fù)合膜。硅油羥基可與SiO_2表面羥基縮合,從而實(shí)現(xiàn)疏水改性,以正庚烷為有機(jī)溶劑,油浴加熱控制溫度98℃,反應(yīng)時(shí)間50 min,此時(shí)白炭黑得到較好改性效果。隨后,制備了改性疏水納米SiO_2填充PDMS復(fù)合膜。通過膜中白炭黑含量、料液溫度、乙醇濃度和流速的改變,對(duì)納米SiO_2填充PDMS膜分離性能進(jìn)行研究。
[Abstract]:Pervaporation technology is an important part of membrane separation technology and has gradually become a new separation technology in recent years. Safety, high efficiency and non-introduction of other pollutants in the separation process are the most distinctive characteristics of pervaporation technology, so this technology has become one of the most promising membrane technologies in the 21st century. In this paper, hydrofluoric acid was used as surface treatment agent to etch the surface of silicone rubber (PDMS) film to increase the surface roughness. The thermal stability, surface morphology and hydrophobicity of the etched PDMS composite film were characterized by DSC-FT-IR SEM and water contact angle. Effect of temperature and osmotic pressure on the separation performance of PDMS etched film. Then the water-sand PDMS composite membrane was prepared by surface elution with nano-PTFE PDMS. The thermal stability, morphology and structure of the filled PDMS films were investigated by means of SEM DSCFT-IR XRD. DMAC- (chloroform aqueous solution), a ternary system of membrane wastewater, was separated by n-PTFE-PDMS filled membrane with 1:10 mass ratio. The effects of temperature, concentration and flow rate on the pervaporation performance of the membrane were studied. Finally, the hydrophobic nano-silica modified PDMS composite film was prepared by adding hydrophobic silica modified with hydrophobic silica. Hydrophobic modification was achieved by condensation of silicone oil hydroxyl groups with SiO-2 surface hydroxyl groups. When n-heptane was used as organic solvent, oil bath heating temperature was 98 鈩，

本文編號(hào)：2031351