高效液相色谱外标法测定硅烷偶联剂中硫脲含量

介绍一种利用高效液相色谱外标法测定硅烷偶联剂中硫脲含量的方法。以乙腈、水为流动相，硫脲为标准样品，采用外标法绘制硫脲标准物质峰面积-质量浓度标准曲线，得出标准曲线的线性回归方程，从而定性、定量分析硅烷偶联剂中硫脲含量。测定结果有助于硅烷偶联剂合成工艺的进一步优化，得到稳定、高品质的产品。     

氨基硅烷偶联剂

介绍了氨基硅烷偶联剂的种类，物性，合成，用途及使用工艺，重点概述了氨基硅烷偶联剂的合成原理及具体实验方法。     

含硫硅烷偶联剂的开发与应用

概述了含硫硅烷偶联剂的种类、合成方法，详细介绍了含硫硅烷偶联剂在轮胎面胶中的应用。并对国内外含硫硅烷偶联剂的市场情况作了介绍。     

含氟硅烷偶联剂的合成及其应用研究进展

介绍了含氟硅烷偶联剂的合成方法，主要包括有机金属化合物法、硅氢加成法、醇解法等，并说明了每种方法的优缺点；阐明了含氟硅烷偶联剂在涂层材料、织物整理、金属表面处理等方面的应用，并对其应用前景进行了展望。     

3—氯丙基三烷氧基硅烷的合成及应用

综述了３－氯丙基三烷氧基硅烷的合成方法，对各种工艺路线进行了评述简要介绍了其在合成硅烷偶联剂中的应用。     

乙烯基硅烷偶联剂合成方法的研究进展

介绍了合成乙烯基硅烷偶联剂的方法：直接合成法、有机金属合成法、热缩合法、硅氢加成法、氯代乙基硅烷脱氯化氢法等，并简明地分析了各种方法的优缺点。     

乙烯基硅烷偶联剂

介绍了乙烯基硅烷偶联剂的种类、物性、合成、用途及使用工艺 ;重点介绍了乙烯基三氯硅烷的合成方法。     

硅烷偶联剂的合成、发展与应用

本文介绍了目前国内外硅烷偶联剂的主要合成技术、生产现状及应用开发情况,并进一步报道了硅烷偶联剂表面改性机理及硅烷偶联剂在塑料、涂料、建筑等行业的应用,展望了硅烷偶联剂的发展前景。     

有机硅改性水性聚氨酯

有机硅改性聚氨酯材料，是由低聚物多元醇构成的软段和二异氰酸酯和扩链剂构成的硬段交替共聚而成，其特征在于在后扩链的过程中采用了可与异氰酸酯基反应的氨基类硅烷偶联剂。本发明还提供了制备这种有机硅改性水性聚氨酯的方法。由于本发明采用氨类硅烷偶联剂，可以在预聚物水分散后加入到体系中，在预聚物的合成中可以不用溶剂或少用溶剂。氨类硅烷偶联剂的胺基可以和残留异氰酸酯基反应而使预聚物扩链，     

胺类硅胶材料的合成及应用

胺类硅胶材料由于具有强吸附性能已经成为人们研究的热门课题,已应用于污水处理、生物医药等很多领域.胺类硅胶材料合成方法主要有包覆法、硅烷偶联剂法、溶胶-凝胶法和化学改性法.本文简单介绍了硅烷偶联剂法和溶胶-凝胶法合成胺类硅胶材料及其在生活中的应用.     

Spectroscopic studies of the gradient in the silane coupling agent/matrix interface in fiberglass-reinforced epoxy

Differential scanning calorimetry, Fourier transform infrared, and solid-state carbon 13 nuclear magnetic resonance were used to study the silane coupling agent/epoxy resin interface. Penetration of epoxy into the hydrolyzed silane has been shown. The addition of a solvent can further increase the penetration of epoxy into the hydrolyzed silane by decreasing the viscosity of the epoxy. Bulk models of the gradient in the silane coupling agent/epoxy interface have shown that the concentration of silane and the degree of hydrolysis of the silane can determine the rigidity or mobility of the interphase region. When the silane is hydrolyzed, the possible formation of entanglements may increase the rigidity of the system and decrease the degree of phase separation through the formation of an interpenetrating network.     

改性煅烧高岭土对EPDM性能的影响

采用硅烷偶联剂对煅烧高岭土进行表面改性，研究硅烷偶联剂品种和用量对煅烧高岭土填充EPDM胶料性能的影响。结果表明。硅烷偶联剂对煅烧高岭土填充EPDM胶料的焦烧时间和正硫化时间影响不大;偶联剂A-17Z的改性作用较为明显，可显著提高EPDM硫化胶的撕裂强度；偶联剂A-172用量过大，对EPDM硫化胶耐溶剂性能不利。     

Synthesis of benzoxazine functional silane and adhesion properties of glass-fiber-reinforced polybenzoxazine composites

A silane coupling agent with a benzoxazine functional group has been synthesized. A series of nonpolar solvents is found to favor benzoxazine monomer formation. Employing these nonpolar solvents, a high-purity benzoxazine functional silane coupling agent is obtained. The effectiveness of this silane coupling agent is evaluated by measuring the interlaminar short-beam shear strength of silane treated glass-fiber-reinforced polybenzoxazine composites. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 2559–2567, 1998     

Water-repellent all-cellulose nanocomposite using silane coupling treatment

Water-repellent all-cellulose nanocomposite (ACNC) was made using the silane coupling agent dodecyltriethoxysilane. The ACNC, consisting of cellulose nanofibers incorporated into a cellulosic matrix, was prepared by reducing crystallinity in the surface of the cellulose nanofibers using DMAc/LiCl solvent, followed by applying pressure and drying. The ACNC surface turned from hydrophilic to hydrophobic by silane coupling treatment. X-ray photoelectron spectroscopy (XPS) measurements confirmed the existence of the silane coupling agent on the surface after treatment. As silane concentration increased, the water contact angle of treated ACNC increased, to a maximum value of 93°. Thermogravimetric analysis and atomic force micrographs showed a multilayered treatment. The silane treated ACNC showed lower water absorption compared to that of untreated one. The silane coupling treatment was also found to increase the mechanical performance of ACNC. Creation of a hydrophobic surface reduces the potential damage associated with water in outdoor applications of ACNC.     

多烷氧基硅烷偶联剂的合成及实验条件探讨

硅烷偶联剂在工业应用上具有重要价值。本实验采用侧链乙烯基硅油与烷氧基氢硅烷加成制备得到多烷氧基长链硅烷偶联剂,对实验条件进行了优化。研究结果表明,采用氯铂酸作为催化剂可以有效的进行硅氢加成反应并得到目标长链硅烷偶联剂,乙烯基过量町控制使硅氢烷的转化率。在相同的反应时问内,4倍乙烯基硅油用量的溶剂可使硅氯烷的转化率最高,催化剂中铂含量为5．0×10^-8mol／g时,在同样反应时间内具有最高的产率。     

Improvement of the Properties of PC/LCP/MWCNT with or without Silane Coupling Agents

Present study concentrates on the effect of silane coupling agent on the properties and dispersibility of multi-walled carbon nanotube (MWCNTs) in the Polycarbonate (PC)/Liquid Crystalline Polymer (LCP) system. Thermal stability of the PC/LCP/MWCNTs has been improved in an appreciable manner with the addition of silane coupling agents, as revealed from thermogravimetric analysis. Storage modulus also enhanced on addition of silane coupling agent into PC/LCP/MWCNTs systems. Field Emission Electron Microscopic study revealed finer morphology and substantial reduction of the LCP domain, indicating better compatibility between PC and LCP in the presence of a silane coupling agent. High Resolution Transmission Electron Microscopic study supports the unform dispersion of MWCNTs throughout the matrix in the presence of a silane coupling agent.     

硅烷偶联剂对电场下丁腈橡胶与铁硫化粘接性能的影响

采用电化学反应的作用方法,研究硅烷偶联剂对丁腈橡胶（NBR）与铁（Fe）的热硫化粘接性能的影响。通过对胶接破坏表面进行扫描电镜以及能谱观察分析,明晰了NBR-Fe粘接界面层的结构特征,并对影响粘合性能以及硫化胶物理机械性能的因素进行了研究分析。结果表明,施加的电场强度、导电填料种类以及硅烷偶联剂的用量对粘合性能作用明显;硅烷偶联剂用量变化不仅对粘合性能影响较大,而且影响NBR硫化胶的导电性及物理机械性能。     

Properties of epoxy molding compound according to the pretreatment method of an amino‐silane coupling agent on epoxy or phenol resin

An amino‐functional silane coupling agent, which is an important component for epoxy molding compound (EMC), has been used by diverse methods, such as integral addition into a mixed powder and pretreatment on silica or on resin. However, the homogeneous dispersion of the amino‐functional silane coupling agent in mixed powder is limited with integral addition, and the possibility of white gel formation, sometimes causing gate blocking during the transfer‐molding process, due to the aggregation of silica with the coupling agent cannot be completely removed by it. The pretreatment of the amino‐functional silane coupling agent on silica has been adopted as an alternative process, but the process is expensive and limited in mass production. Although the pretreatment of the coupling agent on resin as another method has also been used by some EMC manufacturing companies, it has hardly been known in which resin phase, the epoxy or hardener, the silane coupling agent should be pretreated for better mechanical properties of EMC. In this study, the pretreatment of the amino‐functional silane coupling agent on epoxy or phenol resin, essential components of EMC, has been investigated with respect to the reaction during the pretreatment and the properties of EMC according to the different pretreatment methods. In the case of the pretreatment on epoxy, the amino‐functional silane coupling agent rapidly forms an adduct with epoxy via a ring‐opening reaction, whereas its alkoxy groups are well preserved. The glass‐transition temperature and flexural strength of the EMC by the application of the pretreatment method on epoxy are lower than those by the pretreatment on phenol. It is thought that the degree of linkage between the resin matrix and silica becomes lower because of the confinement of aminopropyltriethoxy silane (APTS) within the epoxy matrix through an irreversible reaction with epoxy in advance. In the case of the pretreatment on phenol, most of the alkoxy groups in the coupling agent are assumed to be replaced with protonic nucleophiles such as phenol, generating an equivalent amount of alcohol. Because the adduct between the phenol and amino‐functional silane coupling agent can be easily regenerated during the manufacturing process, it is thought that the pretreatment method of APTS on phenol helps APTS disperse well within EMC. Actually, the glass‐transition temperature and flexural strength of EMC by the application of the pretreatment method on phenol are higher than those by the integral addition method and the pretreatment on epoxy. However, they become lower as the degree of reaction of silane with phenol increases. The pretreatment of the amino‐functional silane coupling agent on phenol shows lots of advantages over the previous methods. From the viewpoint of the process, the homogeneous dispersion of the coupling agent can be obtained with consistency, and the possibility of white gel formation can also be completely removed by it. From the perspective of properties, through a controlled pretreatment on phenol resin, better mechanical properties of EMC can be obtained than those through the pretreatment on epoxy. In addition, the pretreatment process on phenol is simple and feasible for mass production. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2171–2179, 2006     

Insights on Ceramics as Dental Materials. Part II: Chemical Surface Treatments

The purpose of surface treatment (conditioning) methods on dental ceramics is to improve the retention and bonding between the enamel or the dentin and ceramic veneer, with the help of resin composite luting cements. These types of surface treatments include chemically altering the surface of ceramics with some specific acidic etchants followed by applying a silane coupling agent (silane). The silane currently used in dentistry is 3-methacryloxypropyltrimethoxysilane, a hybrid organic–inorganic trialkoxy ester monomer, which is diluted in an acidified water-ethanol solvent system. Such silane primers are said to be pre-hydrolyzed. Some oxide ceramics with high crystalline content, such as alumina and zirconia, cannot be easily etched with acid etchants. They should be silica-coated and silanized prior to bonding. A silane coupling agent should be applied after silica-coating to the ceramic surface to achieve chemical bonding and the optimal durable bond strength.     

氧化锌晶须表面改性及表征

采用湿法表面化学改性法，用硅烷和钛酸酯偶联剂对氧化锌晶须(ZnOw)进行了表面改性；考察了溶剂、pH值、温度及分散时间对硅烷类偶联剂改性效果的影响，采用活化指数、接触角以及傅立叶变换红外光谱对改性结果作了表征。同时将改性后的ZnOw填充到线性低密度聚乙烯(LLDPE)中，测试了复合材料的机械性能。实验结果表明，硅烷和钛酸酯偶联剂均能用于ZnOw的表面改性，其最佳改性条件不同，获得最佳改性效果的偶联剂用量也不同。经ND-42改性的ZnOw填充到LLDPE中，复合材料的弯曲强度大幅度提高。