环氧改性耐热聚酯无溶剂漆的研制及应用

为开发F、H级通用的无溶剂漆．用耐热的多元醇和多元酸、耐热树脂及顺丁烯二酸酐合成了耐热聚酯，与环氧树脂和其他添加合剂配合制成无溶剂浸渍漆，并进行一系列的性能试验和工艺试验。结果表明，该漆具有粘度小、固化快、挥发物小、贮存稳定性好的优点，同时具有优良的电气性能、耐热性和防潮性，可作为F、H级无溶剂浸渍漆，适用于电机的滴浸、常压浸渍和真空压力浸渍绝缘处理。在微电机、中小型低压电机和煤矿电机中的应用结果表明，该漆完全满足上述各型电机的技术要求．现已在工厂大量生产。     

Solventless synthesis of a Schiff base that forms highly fluorescent organic nanoparticles exhibiting aggregation-induced emission in aqueous media

A highly fluorescent solid state Schiff base compound (DBD) was synthesised using a green, solventless and fast approach in 30 sec. DBD shows almost no emission in THF solution, while it emits strong fluorescence in both dispersed nano-aggregates in the solution and as a powder, through a phenomenon known as aggregation-induced emission. Organic nanoparticles of DBD were prepared in aqueous solution using the nanoreprecipitation method with and without stabilizers. The nanoparticles exhibited strong, blue emission when the non-ionic surfactant, like triton X-100, was used as a stabilizer, and strong green emission when no surfactant or the cationic surfactant, like CTAB as a stabilizer was used. Using atomic force microscopy and dynamic light scattering, the sizes of the nanoparticles were found to be around 75 nm when prepared without surfactant, 50 nm when prepared using triton X-100, and 30 40 nm when prepared using CTAB. DBD nanoparticles show an emission maximum at 527 nm (pure green) in the cases of CTAB and no surfactant, while 400 nm emission is observed when triton X-100 is used. Finally, for practical applications, the new type of highly fluorescent organic nanoparticles (DBD) were chosen for on/off fluorescence switching nano sensor for detecting organic vapour.     

马来酰亚胺改性二苯醚无溶剂浸渍漆的研究

采用马来酰亚胺、酚类化合物与甲氧基次甲基二苯醚反应．将不饱和键引入二苯醚树脂中．再加入苯乙烯、引发剂、阻聚剂、改性剂等组分，制得了亚胺改性二苯醚无溶剂浸渍漆。试验表明：该无溶剂浸渍漆具有优良的机电性能和贮存稳定性，通过调整耐热组分的用量，可以制得耐热等级分别为H级、C级的无溶剂浸渍漆。     

无溶剂型湿固化异氰酸酯树脂胶粘剂的研制

研究在单组分湿固化溶剂型异氰酸酯胶粘剂制备的基础上,通过调节溶剂、增塑剂、降粘剂的用量及PAPI与TDI比例,探索其制备工艺。实验证明,用增塑剂、降粘剂代替溶剂是可行的。最终优化得到的无溶剂型湿固化异氰酸酯胶粘剂的配方组成为:增塑剂15％,降粘剂5％,PAPI与TDI摩尔比为4:1。     

Keggin杂多酸催化合成7-羟基-4-甲基香豆素

以间苯二酚和乙酰乙酸乙酯为原料,Keggin结构磷钨酸、磷钼酸、磷钼钨酸和硅钨酸杂多酸做催化剂,在无溶剂的条件下,经Pechmann反应催化合成了7-羟基-4-甲基香豆素,该催化反应具有选择性高、不污染环境及不腐蚀设备的优点。以H4SiW12O40.15H2O催化剂为代表进行了条件优化,在n(间苯二酚)∶n(乙酰乙酸乙酯)∶n(H4SiW12O40.15H2O)=1∶1.5∶0.01,反应温度130℃,反应时间20min条件下,7-羟基-4-甲基香豆素收率为85.9%。该文报告工作的新颖性已为中国科学技术信息研究所2007年6月4日出具的第20071100100234号《科技查新报告》所证实。     

无溶剂环氧非异氰酸酯聚氨酯重防腐涂料的研制

为了解决目前无溶剂环氧聚氨酯涂料生产中由原材料异氰酸酯有毒,以及对湿度敏感等问题给生产与运输带来的不便,本研究以环氧树脂与二氧化碳反应制得的环氧-环碳酸酯为甲组分,以端氨基聚醚和端巯基乙酸一缩二乙二醇酯为乙组分,配以适当的颜填料和助剂,制备了一种新型双组分重防腐涂料。对所制得的防腐涂料性能、影响因素以及配方设计进行讨论,得出了最佳配方。性能测试结果表明涂层防腐性能及物理机械性能均达到重防腐涂料的行业标准。     

苯并(噁)嗪无溶剂浸渍漆的研制

以苯并噁嗪树脂为主体,用环氧酯进行改性,通过潜伏性固化剂调节漆液的固化速度并保持漆液的贮存稳定性,制备了一种适用于沉浸及VPI工艺的新型无溶剂绝缘浸渍漆。利用旋转粘度计、红外光谱、DSC和TGA对无溶剂漆的适用性和可靠性进行了研究。结果表明,该无溶剂漆具有较好的工艺性、贮存稳定性、以及良好的耐热性和低挥发性。     

无溶剂环氧树脂/酰亚胺/酸酐型浸渍树脂的研究

采用含羧基的酰亚胺对环氧树脂进行扩链,并加入甲基四氢苯酐制备了环氧/酰亚胺/酸酐无溶剂浸渍树脂。树脂的固化工艺由差示扫描量热（DSC）结果确定,用热失重法（TG）对固化树脂耐热性进行评价。以体系在60 ℃温度下放置96 h的黏度变化表征浸渍树脂的储存性。结果表明,酸酐的加入改善了树脂工艺性和储存性,酰亚胺基团的加入使固化树脂具有较好的耐热性。     

Effect of mechanochemical preparation of 2D g-C3N4 on electronic properties and efficiency of photocatalytic hydrogen evolution

A comparative study of morphology, spectral and photocatalytic properties of graphene-like C₃N₄ samples prepared by liquid-phase exfoliation of the bulk (l-C₃N₄) and mechanochemically delaminated g-C₃N₄ (m-C₃N₄) was performed for the first time. It was established that the particles of the mechanochemically prepared m-C₃N₄ are predominantly monolayer whereas the particles of l-C₃N₄ possess few-layer morphology. It was shown that m-C₃N₄ exhibits higher photocatalytic activity in the photocatalytic hydrogen evolution from aqueous solution of lactic acid under AM1.5G irradiation due to monolayer morphology, higher reduction potential, as well as more efficient separation and transfer of the photogenerated charges.     

无溶剂厚膜型防腐涂层抗水和氯离子渗透性试验研究

利用静态浸泡和动态浸泡及氯离子渗透等测试方法研究了无溶剂厚膜型防腐涂层抗水和氯离子渗透能力,探讨了涂料不同配方和实验温度的差异对涂层吸水性和湿附着力的影响.结果表明,涂料配方和实验温度对涂层的抗水渗透性有很明显的影响.研制的新型重防腐涂层无论是在静态还是在动态苛刻环境下抗水渗透性能皆为最佳,并且对氯离子具有很好的屏蔽作用.