含氟聚酰亚胺的设计、合成及应用性能研究进展

聚酰亚胺作为结构独特的一类功能性高分子材料,应用广泛。随着人们对材料综合性能要求的提高,含氟聚酰亚胺颇受业界关注。聚酰亚胺结构中引入氟原子既能提高材料溶解性和透光率,还能降低其吸湿率和介电常数。综述了近年来含氟聚酰亚胺在设计、合成和应用性能方面的研究进展,指出其结构设计带来的性能优势。特别是对含氟聚酰亚胺的溶解性、光学性能、热性能等进行了总结。展望了其在柔性显示面板/基板市场的应用发展方向。     

含氟聚酰亚胺的设计、合成及应用性能研究进展

聚酰亚胺作为结构独特的一类功能性高分子材料,应用广泛.随着人们对材料综合性能要求的提高,含氟聚酰亚胺颇受业界关注.聚酰亚胺结构中引入氟原子既能提高材料溶解性和透光率,还能降低其吸湿率和介电常数.综述了近年来含氟聚酰亚胺在设计、合成和应用性能方面的研究进展,指出其结构设计带来的性能优势.特别是对含氟聚酰亚胺的溶解性、光学性能、热性能等进行了总结.展望了其在柔性显示面板/基板市场的应用发展方向.     

2，2-二(3-氨基-4-羟基苯基)六氟丙烷的合成、用途及发展前景

介绍了2,2-二(3-氨基-4-羟基苯基)六氟丙烷的合成方法,叙述了2,2-二(3-氨基-4-羟基苯基)六氟丙烷作为合成含氟聚酰亚胺单体的应用和一些其它用途.另外还阐述了其发展前景.     

含氟聚酰亚胺的研究进展

含氟聚酰亚胺是一类重要的高性能聚合物材料,因其突出的物理化学性质、光学和电学性能以及气体选择透过性等被广泛应用于电子工业、光波通讯、航空航天以及气体分离材料等领域。文章着重介绍了含氟聚酰亚胺的研究进展,同时简述含氟聚酰亚胺结构性能及应用。     

含氟聚酰亚胺的合成及性能研究进展

介绍了含氟聚酰亚胺的性能、分类、制备原料、通用制备方法及应用。综述了近年来含氟聚酰亚胺的合成及性能研究进展情况。     

含氟聚酰亚胺气体分离膜研究进展

介绍了一种新型气体分离膜材料-含氟聚酰亚胺,着重介绍了含氟聚酰亚胺的物理化学性质、气体选择透过性。对其发展历史及应用作了简要概述。通过与传统聚酰亚胺膜材料进行比较,指出了该膜材料的广阔发展前景,并对其今后发展方向进行了展望。     

无色透明聚酰亚胺薄膜的研究进展

本文综述了无色透明聚酰亚胺(PI)薄膜的研究进展及其应用,首先分析了聚酰亚胺薄膜产生颜色的原因,并从分子结构设计的角度,介绍了几种制备无色透明聚酰亚薄膜的方法:分子主链上引入含氟基团、脂环结构和非共平面结构等,并分析了各种方法的不足。此外,还介绍了无色透明聚酰亚胺薄膜在光电器件中的应用。     

低介电常数聚酰亚胺的研究进展

现代微电子工业要求层间绝缘材料具有较低的介电常数。该文介绍了几种降低聚酰亚胺介电常数的方法,包括含氟聚酰亚胺、聚酰亚胺无机杂化复合材料和聚酰亚胺多孔材料,其中最为有效的措施是将含氟取代基引入到聚酰亚胺分子结构中。     

含氟表面活性剂在纺织行业中的现状及发展前景

介绍了含氟表面活性剂的性能特点,叙述了国内外合氟表面活性剂在纺织行业的研究进展,展望了含氟表面活性剂在纺织行业中的应用和发展前景.对含氟表面活性剂中碳氟链进行化学修饰,并使其具有更多特殊功能;在有机氟结构中引入硅基团或者醚键,使碳氟链具有更好的柔顺性,可以制成含氟柔软剂;含氟表面活性剂可以用于超临界二氧化碳反相胶束染色,也可以用含氟聚合物对材料表面进行等离子体处理等.     

二氟乙酰氯在含氟医药中的应用进展

介绍了二氟乙酰氯在制备含氟医药中的应用进展。     

Preparation and properties of soluble and colorless fluorine-containing photoreactive polyimide precursors

Photoreactive polyimide precursors, which are readily soluble in common organic solvents and optically transparent at light of 365 nm wavelength (i-line), similar to aliphatic polyimide precursors, were obtained by polycondensation of biphenyltetracarboxylic dianhydride (BPDA) and fluorine-containing diamine compounds. In particular, the polyimide precursor prepared from 2,2 bis(3-amino-4-methylphenyl) hexatluoropropane showed high solubility in common organic solvents and complete transparence at i-line wavelength. A 3 μm thick film of the polyimide precursor on a silicon wafer was exposed and developed, and offered high resolution (0.5μm line) patterns with an aspect ratio of 6.0. This polymide precursor swells very little in the developing solvent, resulting in the high resolution. Conversion of polyamic acid to polyimide at several curing temperatures was observed by infrared spectrophotometer and thermogravimetry.     

PMDA-6FHP-DR1／SiO2杂化纳米材料的结构设计和合成

以含氟的二胺5，5′—(六氟异丙基)—二—(2—氨基苯酚)及均苯四甲酸酐(PMDA)为单体，首先合成了经酰胺化的主链上带有活性羟基的含氟聚酰亚胺，再通过Mitsunobu反应将活性生色分子分散红1(DR1)共价链接到聚酰亚胺的侧链骨架上，合成了含氟聚酰亚胺．采用溶胶—凝胶(SOl—Gel)技术，并利用偶联剂γ—氨丙基三乙氧基硅烷(AFTES)制备带有发色团的和含有硅氧烷端分子的聚酰胺酸，其中的Si(OR)3基经水解、缩合后，与正硅酸乙酯(TEOS)在催化剂作用下反应，经杂化、凝胶后，得到光学透明且热稳定性高的有机／无机杂化材料．将制得的含氟聚酰亚胺／SiO2杂化材料，采用红外光谱(FT—IR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、示差扫描量热法(DSC)，对材料的结构、表面形貌、热性能进行了表征．     

Solvent effect on the conformation in solution of two polyimides

The dilute solution properties of two polyimides have been studied using size exclusion chromatography, light scattering and viscometry in various solvents. Molecular parameters (conformation and aggregation) are found to be solvent dependent. Addition of a non-solvent (H₂O) to 6FDA-mPDA, a fluorine-containing polyimide, or Ultem a polyetherimide, in the good solvent N-methyl-2-pyrrolidone is responsible for an increase in molecular weight. This is attributed to aggregation of polyimides in these conditions. ©1997 SCI     

Asymmetric synthesis of fluorine-containing compounds using organocatalysts

Asymmetric synthesis of fluorine-containing compounds using organocatalysts has been extensively investigated and several important strategies have been developed in the last decade. This review focuses on the recent advances in the introduction of the fluorine atom into organic molecules by: i) electrophilic fluorination reactions; ii) the use of easily available fluorine-containing building blocks, both of interest in our research laboratory.     

Organosoluble and light-colored fluorinated polyimides derived from 2,3-bis(4-amino-2-trifluoromethylphenoxy)naphthalene and aromatic dianhydrides

A novel fluorinated bis(ether amine) monomer, 2,3-bis(4-amino-2-trifluoromethylphenoxy)naphthalene, was prepared through the nucleophilic aromatic substitution reaction of 2-chloro-5-nitrobenzotrifluoride and 2,3-dihydroxynaphthalene in the presence of potassium carbonate, followed by catalytic reduction with hydrazine and Pd/C. A series of new fluorine-containing polyimides having inherent viscosities of 0.54 to 1.10 dl/g were synthesized from the diamine with various commercially available aromatic dianhydrides using a standard two-stage process with thermal imidization of poly(amic acid) films. These polyimides were highly soluble in a variety of organic solvents, and most of them afforded transparent, light-colored, and tough films with good tensile strengths. These polyimides exhibited glass transition temperatures (T_gs) of 247-300 °C and showed no significant decomposition below 500 °C under either nitrogen or air atmosphere. Except for the polyimide derived from pyromellitic dianhydride, the polyimide films were almost colorless, with an ultraviolet-visible absorption cutoff wavelength below 400 nm and low b∗ values (a yellowness index) of 10.7-41.9. These polyimides had dielectric constants of 3.09 to 3.65 (1 MHz) and moisture absorptions in the range of 0.2-0.3 wt%.     

基于含氟单体的系列农药概述

简要介绍了含氟单体四氟乙烯、六氟丙烯、全氟甲基乙烯基醚和二氟一氯甲烷在农药领域的应用.它们的应用领域包括杀虫剂、杀菌剂、除草剂.为氟化工企业指出了一条新的含氟单体的利用途径.     

合理利用含氟矿石资源促进氟化工转型发展

介绍了萤石和磷矿石储量及其氟资源量比较,论述了含氟矿石的使用情况,估算了我国每年使用的磷矿石中伴生氟的耗散量已超过了国内当年氟化工耗用氟资源的总量。提出了加强磷矿伴生氟综合利用的技术开发,提高氟资源利用率,发展先进氟材料和精细氟化工产品,促进氟化工转型发展。     

Viscose materials with soil-repellent properties

The possibility of fabricating viscose fibres with soil-repellent properties by modifying them with composites based on fluorine-containing copolymer latexes produced by domestic industry was investigated. It was shown that the use of composite systems based on fluorine-containing copolymers will allow obtaining viscose materials with a high level of soil-repellent properties, especially with respect to organic contaminants and water systems. Translated fromKhimicheskie Volokna, No. 6, pp. 47–49, November–December, 1998.     

聚酰亚胺／SiO2杂化材料的硅核磁共振波谱和电光性质的研究

以含氟的二胺5，5’-（六氟异丙基）-二-（2-氨基苯酚）（6FHP）及二酐4，4’-（六氟异丙基）-苯二酸酐（6FDA）或均苯四甲酸酐（PMDA）为单体，以分散红1（DR1）为活性生色分子合成具有非线性光学特性的含氟聚酰亚胺，并采用溶胶-凝胶（Sol—Gel）法合成相应的聚酰亚胺／SiO2杂化材料。采用固态^29SiMASNMR谱研究了含氟聚酰亚胺／SiO2杂化材料的交联结构，结果表明杂化材料中是以T^3、Q^3、Q^4结构为主，说明在杂化材料中形成了交联网状结构．采用衰减全反射（ATR）测定了聚酰亚胺和杂化材料在832nm处的电光系数，其值分别为32、28、34和29pm／V，结果表明具有较高的电光系数。