Hongzan Song, Zhiqiang Luo, Hongchi Zhao, Shanshan Luo, Xiaojing Wu, Jungang Gao and Zhigang Wang
RSC Advances, 2013, 3, 11665-11675
志剛等在此感謝RSC Advances期刊編輯和審稿人對(duì)于我們研究工作的理解和支持！
感謝啊！
本文報(bào)道成功制備了由1-乙基-3-甲基咪唑醋酸離子液體、微晶纖維素和納米二氧化硅粒子組成的具有高強(qiáng)度和高離子導(dǎo)電率的新型生物納米復(fù)合離子凝膠。動(dòng)態(tài)光散射（DLS）和透射電鏡（TEM）結(jié)果表明納米二氧化硅粒子在離子凝膠中能夠很好分散。為了闡明納米二氧化硅粒子對(duì)體系在溶液-凝膠轉(zhuǎn)變和液晶相轉(zhuǎn)變的影響，采用動(dòng)態(tài)流變學(xué)測(cè)試、力學(xué)性能測(cè)試和偏光顯微鏡對(duì)體系進(jìn)行研究。流變學(xué)測(cè)試結(jié)果表明納米二氧化硅粒子加入可以誘導(dǎo)并加快凝膠化過(guò)程。體系溶液-凝膠的相轉(zhuǎn)變溫度和彈性模量可以通過(guò)改變微晶纖維素和納米二氧化硅粒子的含量來(lái)調(diào)節(jié)，其值可以分別達(dá)到125°C和7 × 105 Pa。偏光顯微鏡觀察結(jié)果表明，納米二氧化硅粒子加入明顯抑制了離子凝膠的液晶行為。更為重要的是，發(fā)現(xiàn)在30°C時(shí)離子凝膠的離子電導(dǎo)率可以達(dá)到10?3 Scm?1數(shù)量級(jí)，并且離子凝膠的離子電導(dǎo)率隨其溫度增加和微晶纖維素濃度減小而增大。上述結(jié)果表明，這類具有高強(qiáng)度拉伸性能的新型離子凝膠有望作為凝膠聚合物電解質(zhì)而得到應(yīng)用。
Novel bionanocomposite ionogels consisting of an ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate (EMIMAc), microcrystalline cellulose (MCC) and nano-silica (nano-SiO2) particles with high tensile strength and high ionic conductivity have been successfully prepared. Dynamic light scattering (DLS) and transmission electron microscopy (TEM) measurements reveal a homogeneous dispersion of nano-SiO2in the MCC/nano-SiO2/EMIMAc bionanocomposite ionogels. In order to clarify the influences of added nano-SiO2on the sol–gel transition process and liquid crystalline phase transition for the MCC/nano-SiO2/EMIMAc systems, the complexes were investigated by dynamic rheological measurements, mechanical tensile property tests and polarized optical microscope (POM) observations. The rheological results indicate that the introduction of nano-SiO2can induce and accelerate the gelation for the MCC/nano-SiO2/EMIMAc solutions. By adjusting the MCC and nano-SiO2concentrations, the gel-sol transition temperature and elastic modulus can be well controlled and the optimized values reach 125 °C and 7 × 105Pa, respectively. The POM results reveal that the addition of nano-SiO2significantly suppresses the liquid crystalline behavior of ionogels. A more significant result is that the bionanocomposite ionogels exhibit high ionic conductivity in the order of 10?3S cm?1at 30 °C. The ionic conductivity of the ionogels increases with increasing temperature and decreasing MCC concentration. The above results demonstrate that the novel bionanocomposite ionogels with high tensile strength are promising for the application as gel polymer electrolytes (GPE) in electrochemical devices.