本文選題：聚芳醚砜酮 + 超濾膜��； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：膜分離技術(shù)作為一種高效的新型分離技術(shù)具有廣闊的應(yīng)用前景,超濾膜在水處理方面更是得到了廣泛的應(yīng)用,但高分子超濾膜親水性普遍較差,抗污染能力弱,從而阻礙了超濾膜的推廣。膜材料的性質(zhì)是主要的制約因素,開發(fā)新型親水性材料和對已有材料的親水改性成為改善超濾膜抗污染能力的有效途徑。本論文以提高超濾膜的親水性為研究目的,對超濾膜進(jìn)行親水改性并做了系統(tǒng)的研究。本文通過雙酚A(BPA)、雙酚芴(BHPF)、4,4’-二氟二苯甲酮(DFK)和4,4’-二氯二苯砜(DCS)作為原料,改變雙酚A和雙酚芴的摩爾比,以無水碳酸鉀為縛水劑,制備雙酚A/雙酚芴型聚芳醚砜酮(PAESK)共聚物,通過熱失重等表征手段對共聚物結(jié)構(gòu)性質(zhì)進(jìn)行表征;采用浸沒沉淀相轉(zhuǎn)化法制備聚芳醚砜酮(PAESK)超濾膜,通過測試其熱重、水接觸角、孔隙率、水通量、牛血清蛋白截留率、機(jī)械強(qiáng)度等性能,結(jié)果表明,A/芴比為7:1的超濾膜綜合性能較好。通過二氧化鈦(Ti O2)納米粒子對超濾膜進(jìn)行共混改性,將Ti O2利用超聲波的空化作用均勻分布在鑄膜液中,刮制成膜。并通過X射線衍射、水接觸角、掃面電鏡、孔隙率、水通量、牛血清蛋白截留率、機(jī)械強(qiáng)度等性能測試,結(jié)果表明,引入Ti O2增強(qiáng)了膜的親水性和機(jī)械強(qiáng)度,但水通量有所降低,當(dāng)Ti O2納米粒子添加量達(dá)到1.0 wt%時(shí)改性膜的綜合性能最好,抗污染能力得到明顯改善。通過共混改性的方法,利用Pluronic F127對超濾膜進(jìn)行親水改性,將Pluronic F127直接加入鑄膜液混合均勻刮膜,并對改性膜表征和評(píng)價(jià)。并通過測試水接觸角、孔隙率、水通量、牛血清蛋白截留率、機(jī)械強(qiáng)度等性能,結(jié)果表明,引入Pluronic F127改性膜的親水性得到改善,改性膜的總污染和不可逆污染均顯著降低,水通量有大幅度提升,分析改性膜的綜合性能認(rèn)為Pluronic F127最佳添加量為4 wt%。
[Abstract]:Membrane separation technology, as a new separation technology with high efficiency, has a broad application prospect. Ultrafiltration membrane has been widely used in water treatment, but the hydrophilicity of polymer ultrafiltration membrane is generally poor, and its anti-pollution ability is weak. This hinders the promotion of ultrafiltration membrane. The properties of membrane materials are the main limiting factors. The development of new hydrophilic materials and hydrophilic modification of existing materials is an effective way to improve the anti-fouling ability of UF membranes. In order to improve the hydrophilicity of UF membrane, the hydrophilic modification of UF membrane was studied systematically in this paper. In this paper, the molar ratio of bisphenol A (BPA), bisphenol fluorene (BHPF), difluorobenzophenone (DFK) and dichlorobenzophenone (DCS) was changed, and anhydrous potassium carbonate was used as water binding agent. The copolymers of bisphenol A / diphenol-fluorene polyaryl ether sulfone ketone (PAESK) were prepared and characterized by thermogravimetric analysis. The polyaryl ether sulfone ketone (PAESK) ultrafiltration membrane was prepared by immersion precipitation phase inversion method, and its thermogravimetric and water contact angles were measured. Porosity, water flux, bovine serum protein rejection rate, mechanical strength and so on. The results showed that the comprehensive performance of UF membrane was better when the ratio of A / F was 7:1. The ultrafiltration membrane was modified by titanium dioxide (TIO _ 2) nanoparticles. TIO _ 2 was uniformly distributed in the casting solution by ultrasonic cavitation, and the film was prepared by scraping. The results of X-ray diffraction, water contact angle, scanning electron microscope, porosity, water flux, bovine serum protein rejection, mechanical strength and so on showed that the hydrophilicity and mechanical strength of the membrane were enhanced by introducing TIO 2. However, the water flux was decreased, and the comprehensive properties of the modified membranes were the best when the amount of TIO _ 2 nanoparticles reached 1.0 wt%, and the anti-pollution ability was obviously improved. Pluronic F127 was used for hydrophilic modification of ultrafiltration membrane by blending modification. Pluronic F127 was added directly into casting solution to mix uniform scraping membrane, and the modified membrane was characterized and evaluated. Water contact angle, porosity, water flux, bovine serum protein rejection and mechanical strength were measured. The results showed that the hydrophilicity of the modified membrane was improved, and the total and irreversible fouling of the modified membrane were significantly reduced. The water flux was greatly increased. The optimum addition amount of Pluronic F127 was found to be 4 wt by analyzing the comprehensive properties of the modified membrane.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ051.893

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 張建軍;;膜分離技術(shù)的研究與應(yīng)用[J];廣州化工;2015年07期

2 孫福強(qiáng),崔英德,劉永,楊少華,陳循軍;膜分離技術(shù)及其應(yīng)用研究進(jìn)展[J];化工科技;2002年04期

相關(guān)博士學(xué)位論文 前1條

1 劉e，

本文編號(hào)：2085503