CN100406490C - 一种蓝光发射聚合物膜 - Google Patents

一种蓝光发射聚合物膜 Download PDF

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CN100406490C
CN100406490C CNB2005100116422A CN200510011642A CN100406490C CN 100406490 C CN100406490 C CN 100406490C CN B2005100116422 A CNB2005100116422 A CN B2005100116422A CN 200510011642 A CN200510011642 A CN 200510011642A CN 100406490 C CN100406490 C CN 100406490C
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fluorenes
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CN1854166A (zh
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黄勇
何本桥
于慧
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Institute of Chemistry CAS
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Abstract

一种蓝光发射聚合物膜，聚芴高度取向地分散在聚乙烯基体中，其中聚合物膜的光致发光二色比达到58，聚芴含量为聚合物膜总重量的14-0.4%，优选的聚芴含量为聚合物膜总重量的1-0.5%；聚芴所使用的数均分子量为5,000-50,000，优选的聚芴所使用的数均分子量为5,000-12,000分子量范围，聚乙烯粘均分子量为2000,000-3000,000。其中芴单元的9位上带有两个辛基，聚芴化学名为聚(9，9-二辛基芴)，结构式为右下式。

Description

一种蓝光发射聚合物膜
技术领域
本发明涉及一种可用于光学器件和显示器件高偏振蓝光发射聚合物薄膜。
背景技术
偏振装置是将自然光变成直线偏振光的元件，在光学器件和显示器件方面被广泛应用。目前，通过在聚乙烯中惨杂一种发绿光的共轭聚合物分子，利用传统的拉伸方法制得了偏振发光聚合物膜，C.Weder，C.Sarwa，C.Bastiaansen and P.Smith报道了光致发光二色比高达72的高偏振绿光发射聚合物膜，【Highly polarized luminescence from oriented conjugatedpolymer/polyethylene blend films.Advanced Materials 9，1035-&(1997)】，这种膜由于具有高的取向性和优良的发光性能，可以直接用于液晶显示器中代替原有的偏振片和颜色过滤片，显著提高产品的能效。C.Weder，C.Sarwa，A.Montali，G.Bastiaansen and P.Smith，首先报道了高偏振发光聚合物膜在液晶显示器中地应用【Incorporation of photoluminescent polarizersinto liquid crystal displays.Science 279，835-837(1998)】，受到业界广泛的关注。可是作为三源色之一的蓝光还没有得到高偏振聚合物薄膜。聚芴作为高效蓝光材料已经通过化学的方法合成并工业化，聚芴具有高的量子效率、发纯的蓝光，是一种刚性直链分子，是制备高偏振蓝光的理想材料，人们从方法和工艺上对高偏振蓝光材料进行了大量的研究，但是到目前为止得到的蓝光材料二色比还不超过25，M.Misaki，Y.Ueda，S.Nagamatsu，Y.Yoshida，N.Tanigaki and K.Yase报道了聚芴材料的光致发光二色比为25，【Formation of single-crystal-like poly(9，9-dioctylfluorene)thin film by thefriction-transfer technique with subsequent thermal treatments.Macromolecules 37，6926-6931(2004)】，这是已公开文献中所见的最高的光致发光二色比，但是这不能完全满足工业应用的要求。
发明内容
本发明的目的在于提供一种蓝光发射聚合物膜。
本发明提供的蓝光发射聚合物膜的二色比到达58，也就是说该膜具有很好的发光偏振性。
为实现上述目的，本发明提供的蓝光发射聚合物膜，聚芴高度取向地分散在聚乙烯基体中，其中聚合物膜的光致发光二色比达到58，聚芴含量为聚合物膜总重量的14-0.4％，优选的聚芴含量为聚合物膜总重量的1-0.5％；聚芴所使用的数均分子量为5,000-50,000，优选的聚芴所使用的数均分子量为5,000-12,000分子量范围。
其中芴单元的9位上带有两个辛基，聚芴化学名为聚(9，9-二辛基芴)，结构式为
其中聚乙烯粘均分子量为2000,000-3000,000。
本发明的聚合物膜的制备方法是将聚合物溶液浇注成膜、干燥后，通过拉伸的方法制得高偏振蓝光发射聚合物膜，为了确保聚芴不在膜制备的过程中被氧化，聚芴宜在常温下事先溶解，当聚乙烯完全溶解后再加入到沸腾的聚乙烯溶液中。
具体实施方式
实施例1
称取0.86克聚乙烯倒入95克对二甲苯中加热至沸腾，直到聚乙烯完全溶解；把0.14克聚芴溶解于4克对二甲苯中，然后把该聚芴/二甲苯溶液倒入沸腾的聚乙烯/对二甲苯溶液中，继续加热约10分钟。趁热把混合溶液倒入直径10厘米的玻璃培养皿中，让溶液在20摄氏度下自然冷却，溶剂对二甲苯在20摄氏度下自然挥发形成均匀厚度的薄膜。成膜时间约需两天。裁取适宜于拉伸尺寸大小的膜，加热到100-110摄氏度，并保温在100-110摄氏度下拉伸聚合物膜，从而诱导共轭聚芴分子高度取向。用常规的拉伸方法拉伸该聚合物膜制得了迄今为止偏振性最高的蓝光发射聚合物膜。得到的聚合物膜中聚芴的含量为聚合物膜总重量的14％。
将所得的拉伸聚合物膜用VARIAN公司荧光光谱仪(型号CaryEclipse，FLR025)测定其发光性能，激发光波长350-390nm。在发射光路上安置该光谱仪自带的偏振片附件测定其二色比。二色比的计算是偏振片方向平行于拉伸方向时最高峰发射强度与偏振片垂直于拉伸方向时最高峰发射强度之比。
实施例2
称取0.996克聚乙烯倒入95克对二甲苯中加热至沸腾，直到聚乙烯完全溶解，然后把0.004克聚芴溶解于4克对二甲苯溶液中倒入沸腾的聚乙烯/对二甲苯溶液中，其余操作条件同实施例1。得到的聚合物膜中聚芴的含量为聚合物膜总重量的0.4％。
实施例3
称取0.99克聚乙烯倒入95克对二甲苯中加热至沸腾，直到聚乙烯完全溶解，然后把0.01克聚芴溶解于4克对二甲苯溶液中倒入沸腾的聚乙烯/对二甲苯溶液中，其余操作条件同实施例1。得到的聚合物膜中聚芴的含量为聚合物膜总重量的1％。
实施例4
称取0.995克聚乙烯倒入95克对二甲苯中加热至沸腾，直到聚乙烯完全溶解，然后把0.005克聚芴溶解于4克对二甲苯溶液中倒入沸腾的聚乙烯/对二甲苯溶液中，其余操作条件同实施例1。得到的聚合物膜中聚芴的含量为聚合物膜总重量的0.5％。

Claims (3)

1.一种蓝光发射聚合物膜，聚(9，9-二辛基芴)高度取向地分散在聚乙烯基体中，其中聚合物膜的光致发光二色比达到58，聚芴含量为聚合物膜总重量的1-0.5％，聚芴所使用的数均分子量为5,000-50,000；
其中，聚(9，9-二辛基芴)的结构式为
Figure C2005100116420002C1
2.根据权利要求1所述的蓝光发射聚合物膜，其特征是：聚芴所使用的数均分子量为5,000-12,000分子量范围。
3.根据权利要求1所述的蓝光发射聚合物膜，其特征是：聚乙烯粘均分子量为2000,000-3000,000。
CNB2005100116422A 2005-04-28 2005-04-28 一种蓝光发射聚合物膜 Expired - Fee Related CN100406490C (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1337987A (zh) * 1999-02-04 2002-02-27 陶氏化学公司 芴共聚物以及由该共聚物制成的器件
JP2004059743A (ja) * 2002-07-29 2004-02-26 Osaka Industrial Promotion Organization ポリビニル化合物およびそれを用いた有機ｅｌ素子
CN1184278C (zh) * 2002-05-17 2005-01-12 中国科学院化学研究所 一种蓝色电致发光有机膜及其制备方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1337987A (zh) * 1999-02-04 2002-02-27 陶氏化学公司 芴共聚物以及由该共聚物制成的器件
CN1184278C (zh) * 2002-05-17 2005-01-12 中国科学院化学研究所 一种蓝色电致发光有机膜及其制备方法
JP2004059743A (ja) * 2002-07-29 2004-02-26 Osaka Industrial Promotion Organization ポリビニル化合物およびそれを用いた有機ｅｌ素子

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CN100406490C (zh) 一种蓝光发射聚合物膜

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