本文创新性地将POSS核树枝状凝胶因子(POSS-G1-BOC)加入基体液晶分子5CB中,并且将偶氮苯化合物(Azo)作为光响应剂掺杂至该体系中制备得到液晶物理凝胶.通过管反演法、DSC、旋转流变仪等方法研究液晶物理凝胶的凝胶行为.采用SEM、紫外分光光度计、雾度仪等手段研究液晶物理凝胶的表观形貌、紫外吸收、透光率等.研究结果表明:在凝胶因子含量仅为0.5wt％即可形成凝胶强度良好的液晶物理凝胶,且此时体系溶胶-凝胶温度可达到111℃,远高于基体液晶的相转变温度35℃,具有良好的热稳定性.由于体系中偶氮苯光响应剂的存在,使得其对365nm紫外光及455nm蓝光也具有可逆的响应行为.本文成功地制备了具有光、热双控性质的液晶物理凝胶,为其在防伪商标、食品包装材料、光热传感器、生物医用材料等领域的应用提供了可能.
参考文献
| [1] | 沈利英,陈肖卓,于海涛,梁刚.刺激响应型有机小分子凝胶的研究进展[J].有机化学,2009(03):321-333. |
| [2] | 靳清贤,李晶,李孝刚,张莉,方少明,刘鸣华.超分子凝胶的手性功能应用：手性分子识别与不对称催化[J].化学进展,2014(06):919-930. |
| [3] | N.Mizoshita;Y.Suzuki;K.Kishimoto;T.Kato .Electroptical properties of liquid-crystalline physical gels.: a new oligo (amino acid) gelator for light scattering display materials[J].Journal of Materials Chemistry,2002,12:2197-2201. |
| [4] | Y.Hirai;N.Mizoshita;M.Moiyama;T.Kato .Selfassembled fibers photopolymerized in nematic liquid crystals: Stable electooptical swiching in light-scattering mode[J].LANGMUIR,2009,25(15):8423-8427. |
| [5] | A.Bobrovsky;K.Mochalov;V.Oleinikov;A.Sukhanova .Optically and electrically controlled circularly polarized emission from cholesteric liquid crystal materials doped with semiconductor quantum dots[J].Advanced Materials,2012,24(46):6126-6222. |
| [6] | Y.X.Zhou;N.Sharma;P.Deshmuh et al.Hierachically structured free-standin hydogels with liquid crystalline domains and magnetic nanoparticles as dual physical cross-linkers[J].Journal of the American Chemical Society,2012,134(3):1630-1641. |
| [7] | X.Tong;D.Han;D.Fortin;Y.Zhao .Highly oriented nanofibrils of regiorgular poly (3-hexylthiophene) formed via block copolymer self-assembly in liquid crystals[J].Advanced Functional Materials,2013,23(2):204-208. |
| [8] | T.Kato;Y.Hirai;S.Nakaso et al.Liquid-crystalline physical gels[J].CHEMICAL SOCIETY REVIEWS,2007,36:1857-1867. |
| [9] | N.Mizoshita;K.Hanabusa;T.Kato .Fast and high-contrast electro-optical switching of liquid-crystalline physical gel:formation of oriented microphase-separated structures[J].Adv Funct Mater,2003,13(4):313-317. |
| [10] | S.G.Bia;H.Penga;S.J.Longa et al.High modulus and lowvoltage driving nematic liquid-crystalline physical gels for lightscattering displays[J].SOFT MATERIALS,2013,9(32):7718-7725. |
| [11] | G.D.Tang;S.Chen;F.Ye;X.P.Xu, X.Wang .Loofahlike gel network formed by the self-assembly of a 3D radially symmetrical organic-inorganic hybrid gelator[J].Chemistry Communications,2014,50(54):7180-7183. |
| [12] | E.A.Wilder;C.K.Hall;R.J.Spontak .Physical organogels composed of amphiphilic block copolymers and 1, 3: 2, 4-dibenzylidene-D-sorbitol[J].J of Colloid and interface Science,2003,267(2):509-518. |
| [13] | 方晶,黄卓婷,周云,施燕琴,王旭,陈思.一种应用于光信息存储介质材料的吡啶偶氮苯液晶化合物的制备与表征[J].材料科学与工程学报,2013(06):846-851. |
| [14] | 周云,陈思,叶锋,吴彬霜,王旭.溶剂对偶氮苯酚羟基反应选择性的影响[J].材料科学与工程学报,2012(05):766-769. |
| [15] | 韩相恩,阳岑,张艺馨,张术兵,李戈.偶氮苯液晶聚合物的研究进展[J].材料科学与工程学报,2008(03):485-488. |
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