本文關(guān)鍵詞：纖維素膜在離子液體中的制備及性能研究　出處：《內(nèi)蒙古農(nóng)業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 木質(zhì)纖維素 離子液體 再生纖維素膜 TiO_2 復(fù)合膜

【摘要】：本文以木質(zhì)纖維素為原材料,[AMIM]C1和[BMIM]Cl兩種咪唑型離子液體為溶劑,對(duì)其進(jìn)行溶解性能研究；于[BMIM]C1離子液體中制備了纖維素膜,將其與NaOH/硫脲／尿素／水體系和氯化鋰/DMAc體系制備的纖維素膜相比較,選出最適合制備纖維膜的溶劑體系,于其中制備二氧化鈦／纖維素復(fù)合膜,并對(duì)其進(jìn)行相應(yīng)的研究。主要內(nèi)容如下：1.研究了[AMIM]C1和[BMIM]C1兩種離子液體對(duì)木質(zhì)纖維素的溶解性能。結(jié)果表明,在對(duì)木質(zhì)纖維素分子鏈破壞最小的情況下,[BMIM]C1離子液體對(duì)木質(zhì)纖維素的溶解性能優(yōu)于[AMIM]C1。纖維素在兩種離子液體中溶解再生后沒(méi)有發(fā)生衍生化反應(yīng),晶型由纖維素Ⅰ型變?yōu)棰蛐徒Y(jié)構(gòu),并且結(jié)晶度和聚合度都有所降低。2.在NaOF/硫脲/尿素,水溶解體系、氯化鋰/DMAc溶解體系和[BMIM]C1離子液體三種溶解體系中制備再生纖維素膜,研究發(fā)現(xiàn),[BMIM]C1離子液體中再生的纖維素膜具有較高的聚合度、較好的柔韌性,且平整度高以及透明度好等優(yōu)勢(shì),其拉伸強(qiáng)度可達(dá)79.1MPa,但是熱穩(wěn)定性較低。3.采用TEMPO氧化方法對(duì)纖維素結(jié)構(gòu)單元上C6上的羥基進(jìn)行氧化,同時(shí)利用凝膠-溶膠法成功制備了納米TiO2,將其沉積在羧基化纖維素的表面,于[BMIM]C1離子液體中制備了TiO2/纖維素復(fù)合膜。結(jié)果表明：加入Ti02粒子后,復(fù)合膜對(duì)紫外線具有較強(qiáng)的吸收,但是薄膜的親水性和力學(xué)性能隨著TiO2粒子的增加呈下降趨勢(shì)。
[Abstract]:In this paper, lignocellulose was used as raw material. [AMIM] C1 and. [BMIM] Cl two imidazole-type ionic liquids were used as solvents to study their solubility. [Cellulose membranes were prepared in BMIM] C1 ionic liquids and compared with cellulose membranes prepared in NaOH / thiourea / urea / water system and lithium chloride / DMAc system. The best solvent system for preparing fiber membrane was selected to prepare titanium dioxide / cellulose composite membrane, and the corresponding research was carried out. The main contents were as follows: 1. [AMIM] C1 and. [The solubility of BMIM] C1 ionic liquids to lignocellulose was studied. The results showed that, when the molecular chain of lignocellulose was destroyed least, [The solubility of BMIM] C1 ionic liquid to lignocellulose is better than that of Cellulose. [AMIM] C1.Cellulose was dissolved and regenerated in two kinds of ionic liquids without derivatization reaction, and the crystal form changed from cellulose type 鈪，

本文編號(hào)：1413055