Epoxy/Zn-Al-CO3 LDH nanocomposites: Curability assessment

被引：27
|
作者：
Karami, Zohre [1 ]
Aghazadeh, Mustafa [1 ]
Jouyandeh, Maryam [1 ]
Zarrintaj, Payam [2 ]
Vahabi, Henri [3 ,4 ]
Ganjali, Mohammad Reza [1 ,5 ]
Torre, Luigi [6 ]
Puglia, Debora [6 ]
Saeb, Mohammad Reza [7 ]
机构：
[1] Univ Tehran, Coll Sci, Ctr Excellence Electrochem, Sch Chem, Tehran, Iran
[2] Urmia Univ, Polymer Engn Dept Fac Engn, Orumiyeh, Iran
[3] Univ Paris Saclay, Cent Supelec, Lab Mat Opt Photon & Syst, F-57070 Metz, France
[4] Univ Lorraine, Cent Supelec, LMOPS, F-57000 Metz, France
[5] Univ Tehran Med Sci, Biosensor Res Ctr, Endocrinol & Metab Mol Cellular Sci Inst, Tehran, Iran
[6] Univ Perugia, Dept Civil & Environm Engn, Str Pentima 4, I-05100 Terni, Italy
[7] Inst Color Sci & Technol, Dept Resin & Addit, POB 16765-654, Tehran, Iran
来源：
PROGRESS IN ORGANIC COATINGS | 2020年 / 138卷
关键词：
Cure index; Epoxy; Layered double hydroxide; Zn-Al; Carbonate anion; LAYERED DOUBLE HYDROXIDES; CURE-INDEX; EPOXY/FE3O4; NANOCOMPOSITES; EPOXY ADHESIVES; COATINGS; ZN; CHEMISTRY; BEHAVIOR; INTERCALATION; NANOPARTICLES;
D O I：
10.1016/j.porgcoat.2019.105355
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In this work, the curability of epoxy nanocomposite consisting of Zn-Al layered double hydroxide (LDH) intercalated with carbonate anion (CO3) was studied via nonisothermal differential scanning calorimetry (DSC) by the aid of Cure Index (CI). The hydrothermal-assisted constant pH coprecipitation method was used in synthesis of lamellar LDH and the resulting structure was confirmed by FTIR, XRD and TGA/DTGA analyses. From the CI point of view, the cure state of epoxy/Zn-A-CO3-LDH nanocomposite was Poor at heating rates of 2 (low) and 10 (high) degrees C/min. By contrast, crosslinking of epoxy resin was facilitated in the presence of Zn-Al-CO3-LDH at intermediate heating rates of 5 and 7 degrees C/min due to intensified ring opening reaction of epoxy under the Lewis acid effect of Zn metal, which changed the cure label of epoxy/Zn-Al-CO3-LDH nanocomposite from Poor to Excellent.
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页数：6
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