本文選題：聚偏氟乙烯　切入點(diǎn)：碘轉(zhuǎn)移聚合　出處：《濟(jì)南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：聚偏氟乙烯(PVDF)是一種表觀呈白色粉末或顆粒狀的聚合物,具有的特征為機(jī)械強(qiáng)度較高,耐輻射性能優(yōu)異,化學(xué)穩(wěn)定性好,在常溫條件下耐酸堿侵蝕,但是在實(shí)際應(yīng)用過程中由于C-F鍵的強(qiáng)烈的疏水疏油性質(zhì),導(dǎo)致PVDF膜極易在處理各種水廢液中產(chǎn)生分離效率低、吸附污染等問題,所以對(duì)聚偏氟乙烯膜的親水性改性就顯得極為重要。論文的主要研究?jī)?nèi)容為通過合成一種親水性的嵌段共聚物采用物理共混的方法對(duì)聚偏氟乙烯膜進(jìn)行了親水性改性,制備出了親水性良好的聚偏氟乙烯膜。首先,我們采用沉淀聚合的方法以使用三氟三氯乙烷(F-113)作為溶劑,以過氧化苯甲酰(BPO)為引發(fā)劑,以全氟碘丁烷(TI-4)為碘轉(zhuǎn)移劑,在高壓反應(yīng)釜進(jìn)行反應(yīng),通過紅外、核磁的表征證明合成了大分子碘轉(zhuǎn)移劑C4F9-PVDF-I。其后使用溶液聚合的方法以自制的C4F9-PVDF-I為大分子的碘轉(zhuǎn)移劑,以N,N-二甲基甲酰胺為(DMF)溶劑,以過氧化苯甲酰(BPO)為引發(fā)劑制備出了二嵌段共聚物PVDF-b-PtBA。通過使用FT-IR光譜檢測(cè)在2800-3000cm-1 cm-1處以及1734cm-1處出現(xiàn)的吸收峰證明了-C=O以及-CH-伸縮振動(dòng)吸收峰,同時(shí)使用1H NMR光譜對(duì)嵌段共聚物PVDF-b-PtBA進(jìn)行了結(jié)構(gòu)表征,使用電子掃描顯微鏡(SEM)研究了合成的嵌段共聚物PVDF-b-PtBA的自組裝行為,并觀察到了嵌段共聚物PVDF-b-PtBA自組裝的成球現(xiàn)象。使用合成的嵌段共聚物PVDF-b-PtBA、聚偏氟乙烯樹脂、聚乙二醇(PEG-400)以N、N-二甲基甲酰胺為溶劑配置出鑄膜液。使用鑄膜液以相轉(zhuǎn)化法制備出了親水性的偏氟乙烯膜;使用接觸角測(cè)量?jī)x對(duì)制備的親水性的聚偏氟乙烯膜進(jìn)行了親水性測(cè)試,經(jīng)過處理后的的PVDF膜對(duì)水的接觸角的膜從94.7°下降到58.5°;使用TGA的方法對(duì)親水性聚偏氟乙烯膜進(jìn)行了熱穩(wěn)定性的測(cè)試,親水性PVDF膜的熱分解溫度有了較大的提高,分解溫度達(dá)到260℃以上;親水性PVDF膜的機(jī)械強(qiáng)度達(dá)到19MPa;SEM測(cè)試結(jié)果表明親水改性PVDF膜的表面存在凹凸不平的孔洞。實(shí)驗(yàn)結(jié)果表明成功合成了碘轉(zhuǎn)移劑C4F9-PVDF-I,并利用此碘轉(zhuǎn)移劑C4F9-PVDF-I合成了二嵌段共聚物PVDF-b-PtBA,使用嵌段共聚物PVDF-b-PtBA對(duì)聚偏氟乙烯膜進(jìn)行了親水性改性,表明改性的PVDF膜的親水性能有很大的提高。
[Abstract]:Polyvinylidene fluoride (PVDF) is an apparent white powder or granular polymer, characterized by high mechanical strength, excellent radiation resistance, good chemical stability, and resistance to acid and alkali erosion at room temperature. However, due to the strong hydrophobic and oil hydrophobic properties of C-F bond in practical application, the PVDF membrane is prone to low separation efficiency and adsorption pollution in the treatment of various kinds of waste water. So the hydrophilic modification of PVDF membrane is very important. The main research content of this paper is to synthesize a hydrophilic block copolymer and physical blending method to modify PVDF membrane hydrophilic. The hydrophilic poly (vinylidene fluoride) membrane was prepared. Firstly, we used precipitation polymerization method to use trichlorotrichloroethane (F-113) as solvent, benzoyl peroxide (BPO) as initiator and perfluoroiodobutane butyrate (TI-4) as iodine transfer agent. The reaction was carried out in a autoclave. It was proved by IR and NMR characterization that the macromolecular iodine transfer agent C4F9-PVDF-Iwas synthesized. After that, the self-made C4F9-PVDF-I was used as the macromolecular iodine transfer agent, and the NN-dimethylformamide was used as the DMF solvent. Diblock copolymer PVDF-b-PtBA was prepared by using benzoyl peroxide (BPO) as initiator. The absorption peaks at 2800-3000cm-1 cm-1 and 1734cm-1 were determined by FT-IR spectroscopy. At the same time, the structure of block copolymer PVDF-b-PtBA was characterized by 1H NMR spectroscopy, and the self-assembly behavior of block copolymer PVDF-b-PtBA was studied by electron scanning microscope (SEM). The ball-forming phenomenon of block copolymer PVDF-b-PtBA self-assembly was observed. PVDF-b-PtBA, polyvinylidene fluoride resin, were used as block copolymers, polyvinylidene fluoride (PVDF-b-PtBA). PEG-400) the hydrophilic vinylidene fluoride (VDF) membrane was prepared by phase inversion method with NN- dimethylformamide as solvent. The hydrophilic polyvinylidene fluoride (PVDF) membrane was tested by contact angle measuring instrument. The contact angle of the treated PVDF membrane to water decreased from 94.7 擄to 58.5 擄, the thermal stability of the hydrophilic polyvinylidene fluoride membrane was tested by TGA method, and the thermal decomposition temperature of the hydrophilic PVDF membrane was improved greatly. The decomposition temperature is above 260 鈩，

本文編號(hào)：1644778