结构型光敏聚酰亚胺的合成研究

以对乙酰氨基苯甲醛、间乙酰氨基苯乙酮为原料经两步反应合成具有光敏性能的1-(3-氨基苯基)-3-(4-氨基苯基)-2-丙烯-1-酮.采用溶液缩聚及化学亚胺化法制备了相应的光敏聚酰亚胺.光敏性二胺经液相色谱分析其纯度分别为99.92%,紫外可见最大吸收波长为349nm.光敏聚酰亚胺的耐热温度超过400℃,紫外可见最大吸收波长为365nm.所得方法操作简便,收率较高,原料易得.并用元素分析、核磁共振、红外光谱等手段对产物的结构进行了表征.     

All‐Polymer Solar Cells Based on a Conjugated Polymer Containing Siloxane‐Functionalized Side Chains with Efficiency over 10%

A novel wide‐bandgap conjugated copolymer based on an imide‐functionalized benzotriazole building block containing a siloxane‐terminated side‐chain is developed. This copolymer is successfully used to fabricate highly efficient all‐polymer solar cells (all‐PSCs) processed at room temperature with the green‐solvent 2‐methyl‐tetrahydrofuran. When paired with a naphthalene diimide‐based polymer electron‐acceptor, the all‐PSC exhibits a maximum power conversion efficiency (PCE) of 10.1%, which is the highest value so far reported for an all‐PSC. Of particular interest is that the PCE remains 9.4% after thermal annealing at 80 °C for 24 h. The resulting high efficiency is attributed to a combination of high and balanced bulky charge carrier mobility, favorable face‐on orientation, and high crystallinity. These observations indicate that the resulting copolymer can be a promising candidate toward high‐performance all‐PSCs for practical applications.     

阴离子表面活性剂缔合亚甲基蓝光度法测定硫化物的研究

在酸性介质中,硫化物与对氨基二甲基苯胺形成亚甲蓝,并与十二烷基磺酸钠缔合,可使吸光度提高．该缔和物于６６０ｎｍ处有最大吸收,摩尔吸光系数为１２０×１０４Ｌ·ｍｏｌ－１·ｃｍ－１,Ｓ２－含量在０～２４μｇ／２５ｍＬ范围内符合比尔定律．该方法用于天然水中微量硫化物的测定,结果满意     

硅氧烷与丙烯酸树脂的原位和接枝聚合研究

介绍了硅氧烷与丙烯酸树脂的原位、接枝聚合方法,改性过程中水、酸、催化剂等的影响。研究结果表明,原位聚合改性大大提高了丙烯酸树脂的耐热性、耐溶剂性     

3D Orientational Control in Self‐Assembled Thin Films with Sub‐5 nm Features by Light

While self‐assembled molecular building blocks could lead to many next‐generation functional organic nanomaterials, control over the thin‐film morphologies to yield monolithic sub‐5 nm patterns with 3D orientational control at macroscopic length scales remains a grand challenge. A series of photoresponsive hybrid oligo(dimethylsiloxane) liquid crystals that form periodic cylindrical nanostructures with periodicities between 3.8 and 5.1 nm is studied. The liquid crystals can be aligned in‐plane by exposure to actinic linearly polarized light and out‐of‐plane by exposure to actinic unpolarized light. The photoalignment is most efficient when performed just under the clearing point of the liquid crystal, at which the cylindrical nanostructures are reoriented within minutes. These results allow the generation of highly ordered sub‐5 nm patterns in thin films at macroscopic length scales, with control over the orientation in a noncontact fashion.     

Flexible Hard Coating: Glass‐Like Wear Resistant,Yet Plastic‐Like Compliant,Transparent Protective Coating for Foldable Displays

A flexible hard coating for foldable displays is realized by the highly cross‐linked siloxane hybrid using structure–property relationships in organic–inorganic hybridization. Glass‐like wear resistance, plastic‐like flexibility, and highly elastic resilience are demonstrated together with outstanding optical transparency. It provides a framework for the application of siloxane hybrids in protective hard coatings with high scratch resistance and flexibility for foldable displays.     

含氢聚硅氧烷/醋酸乙烯酯/N-羟甲基丙烯酰胺三元共聚乳液的研究

采用含氢聚硅氧烷（PHMS），醋酸乙烯酯（VAc)及N－羟甲基丙烯酰胺（NMA）进行三元乳液共聚反应，得到了PHMS／VAc/NMA共聚乳液，讨论了PHMS用量对单体转化率，乳液稳定性，流变性的影响。结果表明：随着PHMS用量的增加，单体转化率下降，体系粘度增加，机械稳定性和冻融稳定性增加，电解质稳定性下降；该其聚物乳液为假塑性流体，具有良好的成膜性，机械稳定性和耐冻融稳定性。     

主链型偶氮苯改性聚芳酰胺的合成及表征

在以N,N二甲基乙酰胺为溶剂,三乙胺为酸吸收剂的条件下,将自制的反式-4,4'-偶氮苯二甲酰氯与对苯二胺进行低温缩聚反应,合成了1种新型的反式偶氮苯聚芳酰胺.用红外光谱、示差热扫描量热分析,热重分析,偏光显微镜,紫外光谱对其结构及性能进行了表征.合成的聚合物表现出了一定的结晶性能,聚合物的稀溶液呈现出溶致液晶行为.     

Thermoreversible Siloxane Networks: Soft Biomaterials with Widely Tunable Viscoelasticity

Polysiloxane elastomers represent a widely utilized soft material with excellent rubber‐like elasticity, biocompatibility, and biodurability; however, there is a lack of an effective and straightforward approach to manipulate the material's viscoelastic response. A facile hydrosilylation reaction is employed to integrate ureidopyrimidinone hydrogen‐bonding side‐groups into linear and crosslinked siloxane polymers to achieve biocompatible soft materials with a highly tunable viscoelastic relaxation timescale. Stacking of H‐bonded moieties is avoided in the designed macromolecular architectures with tight, side‐groups substituents. The obtained siloxane network features the presence of both covalent crosslinks and truly thermoreversible crosslinks, and can be formulated across a broad material design space including elastic solids, recoverable viscoelastic solids, and viscous liquids. The elastomers exhibit unique temperature‐dependent shape‐memory capability and show good cytocompatibility. Importantly, a deformed material's shape‐recovery occurs regardless of external triggering, and through manipulation of network formulations, the shape‐recovery timescale can be easily tuned from seconds to days, opening new possibilities for biomedical, healthcare, and soft material applications.     

有机硅耐热涂料的研究

本课题借助现代化分析手段对有机硅、甲基有机硅及环氧改性有机硅树脂的固化过程进行了研究,以此为依据制定了合理的固化工艺;通过比较不同配方色漆的性能,确定了以TiO2为颜料,SiO2、云母粉、滑石粉石粉为填料的色漆组成。该涂层具有优异的耐热性和机械性能,综合性能良好,长期耐热温度大于250℃,短期耐热大于550℃,可作为耐高温涂料。