磷酸功能化有机无机SiO2复合防腐涂层的结构及性能

采用溶胶-凝胶法,以γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)与正硅酸乙酯(TEOS)进行水解聚合,再与磷酸氢二(甲基丙烯酰氧乙基)酯(EGMP)进行自由基聚合,在马口铁上制备有机无机复合防腐涂层。通过傅里叶变换红外光谱表征涂层结构,扫描电镜研究涂层的微观表面,附着力测试研究涂层对基材的附着水平,极化曲线以及中性盐雾测试对复合薄膜的防腐性能测试,并探讨了EGMP量对涂层的性能的影响。结果表明,有机无机网络结构已形成,表面致密光滑,其附着力水平达到1级,n(KH570)∶n(EGMP)=4∶1时涂层的防腐性能最好。     

防腐蚀涂料

正201604020具有优异防腐性能的铈掺杂型硅氧烷-PMMA复合涂料及其性能研究[刊,英]/Harb,S.V.等//RSC Advances.-2015,5(20).-15 414~15 424涉及了一种铈掺杂型有机-无机复合涂料,其涂层在碳钢材料上的防腐性能与涂层的结构特征有关。采用溶胶凝胶法,将甲基炳烯酸甲酯(MMA)与3-甲基丙烯酰丙基三甲氧基硅烷(MPTS)进行自由基聚合,然后采     

KH 570改性硅溶胶的研制

以正硅酸乙酯(TEOS)水解制备硅溶胶,在水解反应的同时直接引入γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH 570),制得KH 570改性硅溶胶。研究了反应温度、配料比等工艺条件对改性硅溶胶性能的影响,结果表明,在温度50℃、反应体系p H值为8、n(H2O)∶n(TEOS)∶n(KH 570)∶n(C2H5OH)∶n(NH3·H2O)=6∶1∶1∶6∶0.08、持续水解反应5 h条件下,制得的KH 570改性硅溶胶的蓝光效果最佳,固体质量分数达24.9%,表现出良好的稳定性,并对产物进行了红外、热稳定性、粒径、扫描电镜的测试和表征,证实已成功制得KH 570改性硅溶胶。     

有机硅改性丙烯酸酯乳液的性能研究

采用γ-甲基丙烯酰氧基丙基三甲基硅烷(KH 570改性丙烯酸酯类聚合物,合成了丙烯酸酯聚合乳液,研究了单体配比、乳化剂用量、聚合方法对乳液性能的影响.结果表明:单体配比MMA∶BA∶MAA=54∶44∶2,乳化剂用量为3%时,乳液的综合性能较好.     

KH570改性聚氨酯/丙烯酸酯乳液制备及应用

实验主要以异佛尔酮二异氰酸酯(IPDI)、聚四氢呋喃醚二醇(PTMG1000)、N-甲基二乙醇胺(MDEA)、三羟甲基丙烷(TMP)等为基本原料合成聚氨酯乳液,在合成乳液的过程中应用硅烷偶联剂γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)对水性聚氨酯进行交联改性,这样不但可以增加聚氨酯的分子量,同时也可以改善其涂膜的防水性能。实验表明,经KH570改性的聚氨酯乳液的最佳合成条件为:n(-NCO)∶n(-OH)=1.12,m(St)∶m(BA)=1∶2,w(MDEA)=5.50%,w(TMP)=0.55%,w(KH570)=0.7%,w(HEA)=0.92%,引发剂的加入量为0.2 g,聚合温度控制在80℃。此条件下合成的乳液性能最好。     

复合改性水滑石的制备与表征

采用十二烷基硫酸钠(SDS)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)对镁铝水滑石进行有机改性,得到插层改性和表面改性结合的复合改性水滑石。XRD、FTIR的分析结果表明:SDS已垂直插入水滑石层间,层间距达到2.72 nm,KH570只覆盖在水滑石表面,与层板表面羟基进行偶联。通过控制离子交换反应条件,有机阴离子可以插入水滑石层间完全取代CO2-3,反应生成的柱撑水滑石具有完整的层状结构。     

苯乙烯在改性氧化石墨烯表面的接枝聚合

采用硅烷偶联剂γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)对氧化石墨烯(GO)进行有机改性,得到了改性氧化石墨烯(GO-KH570),然后在GO-KH570表面接枝苯乙烯(St),制备了一种表面接枝聚苯乙烯(PS)的阻燃剂(GO-KH570)-g-PS。采用傅里叶变换红外光谱仪、X射线光电子能谱、热失重分析仪和扫描电子显微镜对GO、GO-KH570和(GO-KH570)-g-PS进行了测试表征。结果表明,成功合成了接枝率为20.37%的(GOKH570)-g-PS。     

新型含硅氧烷丙烯酸酯共聚物的制备及其涂膜性能

以单体甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、硅烷偶联剂3-甲基丙烯酰氧丙基三甲氧基硅烷(KH570)为原料,采用自由基溶液聚合方法合成了一种含有机硅氧烷的丙烯酸酯共聚物P(MMA-BA-KH570),并将此共聚物与无机硅溶胶进行复配制得一种新型有机-无机杂化涂料.讨论了共聚物合成工艺的主要影响因素,利用傅里叶变...     

改性凹凸棒土增容PP/PGA复合材料及纤维的结构与性能

采用γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)对凹凸棒土(ATP)进行表面化学改性制得ATP-KH570,再经接枝聚合制得ATP接枝聚甲基丙烯酸缩水甘油酯改性粒子(ATP-g-PGMA).以ATP-g-PGMA为增容剂,协同聚丙烯接枝马来酸酐(PP-g-MAH)对PP/聚乙醇酸共混物(PP/PGA)进行增容改性...     

硅烷改性丙烯酸酯乳液性能研究

在水解抑制剂(YZ-1)的作用下,通过乳液聚合实现甲基丙烯酸甲酯(MMA),丙烯酸丁酯(BA)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)共聚,合成了硅丙乳液。研究了YZ-1和KH570用量对聚合过程和聚合物性能的影响。结果显示,当YZ-1用量2%,硅单体质量分数9%时,聚合过程稳定,共聚物具有较好的相容性,乳胶膜的吸水性由8.33%降至2.64%。     

表面修饰凹凸棒石及其在环氧丙烯酸树脂中的应用

旨在提高凹凸棒石在环氧丙烯酸酯中的力学性能及分散性能,以凹凸棒石纳米粉体为载体,采用化学沉淀法制备出包硅凹凸棒石复合纳米材料(Si O2/ATP),再用硅烷偶联剂KH570对Si O2/ATP表面进行有机改性,制得KH570-g-Si O2/ATP复合材料。通过TEM、FTIR、XRD及TG对复合材料进行表征。采用共混法制备了紫外光固化复合涂层,考察了KH570-g-Si O2/ATP的添加量对复合涂层耐冲击力、柔韧性的影响。结果表明,当KH570-g-Si O2/ATP的用量占涂料总重量的5%时,与EA涂层相比,复合涂层的耐冲击力的高度由15 cm增加至35 cm;涂膜的柔韧性由15 mm提升至5 mm;此外,与ATP、Si O2/ATP以及KH570-g-ATP相比,KH570-g-Si O2/ATP在EA涂层中具有良好的分散性,EA涂层的力学性能也得到明显改善。     

Influence of MWCNTs modified by silane coupling agent KH570 on the properties and structure of MWCNTs/PLA composite film

Composite films based on poly(lactic acid)(PLA) filled with modified multiwalled carbon nanotubes (MWCNTs) were prepared by casting/solvent evaporation technique and investigated for their properties and structures. MWCNTs were modified by coupling agent KH570 which can improve the dispersion of MWCNTs and then enhance the comprehensive properties of PLA. The influences of modified conditions, including the amounts of KH570, the reaction temperature and time, were analyzed. And also the structures and properties of composite films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FTIR) and thermogravimetric analysis (TG). The two components of the composite films, WMCNTs and PLA, had excellent compatibility. The addition of MWCNTs modified by coupling agents KH570 was beneficial for the crystallization of PLA, and the toughness of composite films was also improved. When the reaction temperature was 70 °C, reaction time was 6 h, and the amount of KH570 was 3 % respectively, the obtained composite films had the perfect comprehensive properties.     

硅烷偶联剂对纳米Al2O3改性的研究

本工作以改善纳米粒子在环氧树脂基体中的分散性,提高无机粒子与基体的界面结合力为目的,选择了硅烷偶联剂KH550和KH570分别对纳米Al2O3粒予表面进行改性。文章系统研究了各种聚合条件（加料顺序、偶联剂加入量、反应时间）对改性效果的影响。TGA测试表明获得了不同接枝率的改性粒子。改性粒子与环氧树脂反应后进行的TGA测试以及FTIR测试证明了KH550改性的纳米粒子能够与环氧树脂发生反应,而KH570改性的纳米粒子不能发生反应。     

有机硅改性丙烯酸酯树脂的合成及其光固化动力学研究

以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(n-BA)、二缩三丙二醇二丙烯酸酯(TPGDA)、γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH-570)为单体,正十二烷基硫醇(NDM)为链转移剂,偶氮二异丁腈(AIBN)为引发剂,合成了一种可紫外光固化的丙烯酸酯树脂(UV-WZF)。通过FT-IR、DSC、TGA对其结构和性能进行了研究。讨论了KH-570的含量和TPGDA的含量对光固化膜的附着力、光固化速率的影响。结果表明:当硅烷偶联剂KH-570的用量为6%时,涂膜附着力良好;当TPGDA的用量为26%时,固化漆膜的光固化时间最短。采用实时红外光谱原位跟踪监测了该树脂的光固化动力学行为,结果表明:当光引发剂Darocur1173含量为树脂质量的5%时,体系的光固化速率最优,增大光强利于光固化。     

Oxidation‐grafting surface modification of waste silicone rubber composite insulator powder: Characterizations and properties of EPDM/modified waste powder composites

In order to broaden the applications of waste silicone rubber composite insulator powder (WSP), modified waste powder (WSP‐KH570) was prepared by a two‐step treatment process involving improved surface oxidation approach by using acidic H₂O₂ solution and subsequently grafting of KH570. Fourier transform infrared spectroscopy in the attenuated total reflection mode (FTIR‐ATR) analysis revealed the presence of KH570 on the powder surface. The result was confirmed by thermogravimetric analysis (TGA). Blends of ethylene propylene diene monomer (EPDM) with WSP‐KH570 were prepared. The effects of WSP‐KH570 on mechanical properties and thermal properties of the blends were investigated. The WSP‐KH570 showed an observed improvement in tensile strength and elongation at break of EPDM/WSP‐KH570 blends compared with corresponding compositions of EPDM/WSP blends. The TGA cure showed that EPDM filled with WSP‐KH570 had higher thermal stability at 210–380 °C than EPDM/WSP. Dynamic mechanical analysis indicated EPDM and WSP‐KH570 were better miscible with the blend ratio (90/10). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45438.     

Some interesting phenomena in silica‐filled HNBR with the addition of silane coupling agent

Hydrogenated nitrile rubber (HNBR)/silica nanocomposites were prepared by in‐situ modification dispersion technology, and the silane coupling agent γ‐methacryloxypropyl trimethoxy silane (KH570) was chosen to promote the interfacial strength between silica particles and HNBR matrix and further improve the dispersion of silica particles. Rubber Process Analyzer (RPA2000) was used to test the Payne effect of HNBR/silica compounds, from which some interesting phenomena were found: the Payne effect became stronger after KH570 was added to HNBR/silica compound at room temperature, which was a contrary result compared to SBR/silica system. However, after stored for a month at room temperature, the Payne effect weakened, which was contrary to the traditional phenomenon of storage hardening of filled rubber. All these results are related to filler–filler interaction and filler–rubber interaction. The modulus at small strain amplitude of HNBR/silica compound with KH570 gradually decreased with the increase of times of circulatory strain sweep but that of compound without KH570 had almost no change, which was explained by Fourier Transform Infrared (FTIR) results that the reaction between silica and KH570 almost completed at the test condition: 80°C and about 1 h. The effects of silane amount, heat‐treated temperature and time on the Payne effect of compounds and the mechanical properties of vulcanizates were also investigated. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

纳米二氧化硅颗粒表面设计及其填充聚氯乙烯复合材料的性能

利用表面原位接枝聚合在纳米二氧化硅颗粒表面引入聚甲基丙烯酸甲酯(PMMA)高分子链段,用共混法制备了nano-SiO2/PVC复合材料,研究了不同界面特性时SiO2/PVC复合材料的力学性能.研究结果表明通过表面原位接枝聚合反应可以在纳米二氧化硅颗粒表面接枝聚甲基丙烯酸甲酯;表面接枝PMMA的nano-SiO2/PVC复合材料在力学和加工性能等方面都优于偶联剂处理和表面未处理样品.在纳米二氧化硅颗粒填充量为0%～8%(wt)时,复合材料的拉伸强度和冲击强度随着填充量的提高先上升后下降,并在4%～6%(wt)达到最大值.经PMMA表面接枝后SiO2/PVC具有更强的界面作用,偶联剂KH570处理的次之,表面未处理样品的最差.     

有机硅氧烷双重改性水性环氧乳液的研究

采用有机硅烷单体KH570和KH550双重改性水性环氧乳液,通过FT - IR、TGA、接触角测量仪对KH550、KH570改性所得产物及其涂膜进行表征,对改性后水性环氧乳液固化涂膜的微观结构及宏观性能进行了研究.结果表明:当KH570与KH550含量占环氧树脂的质量分数比为5∶1时,双重改性环氧乳液具有良好的贮存稳定...     

等规聚丁烯-1/玉米秸秆复合材料的制备与性能研究

使用硅烷偶联剂γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)改性生物质废弃物玉米秸秆粉(CP),以期改善其与聚合物的相容性,并将其引入等规聚丁烯-1(iPB)基体中制备iPB/CP复合材料,考察了改性前后复合材料的力学性能、热变形温度及微观形貌.结果表明,KH570成功的接枝到CP表面,经过KH570改性后的复合材料...