Effects of modified attapulgite on the properties of attapulgite/epoxy nanocomposites

Abstract

The aim of this work is to figure out the true effects of filler modification in attapulgite (ATP)/epoxy (EP) nanocomposites through comparing the properties of composites containing pristine or modified ATP clay. ATP particles were first pretreated by a silane coupling agent KH550 and cationic surfactant cetyl trimethyl ammonium bromide (CTAB) separately, and then a series of nanocomposites were prepared with varied clay loadings. Fourier transform infrared spectroscopy and thermogravimetric analysis were used to confirm the modification. The wicking experiment showed the compatibility of ATP with EP increased after modification, especially for CTAB‐ATP, which was discovered to exhibit the highest affinitive ratio. Mechanical and thermal properties of the composites were enhanced on the introduction of ATP. Regarding the efficiency of mechanical reinforcement, KH550 was superior to CTAB at lower ATP loadings (<2 wt%), whereas CTAB became relatively more effective at higher loadings. POLYM. COMPOS., 2013. © 2012 Society of Plastics Engineers

Effect of Surface Modification of Palygorskite on the Properties of Polypropylene/Polypropylene-g-Maleic Anhydride/Palygorskite Nanocomposites

“…The SEM observations suggest that the experimental conditions used during surface modification of Pal did not significantly modify the aspect ratio morphology. was attributed to OH bending vibrations of coordinated, absorbed, and zeolite water [3]; it is probable that the above band could overlap the signal associated with vibrations of the amino groups from silane molecules at 1608 cm −1 . The bands at 1194 cm −1 and 1034 cm −1 were attributed to asymmetric stretching vibrations from Si-O.…”

“…A recurrent procedure to promote Pal dispersion within the polymer is to modify its surface with organic modifiers in order to reduce the interactions among silicate fibers and to promote compatibility with the polymer matrix. Pal has been traditionally modified with a silane coupling agent [1,[10][11][12][13] to produce polymer/Pal nanocomposites based on epoxy resin [3], Nylon 6 [14][15][16][17], natural rubber [18], ethylenevinyl acetate copolymers [19], or poly-aniline [20]. However, the use of cationic surfactants to modify Pal has been less frequently reported [21][22][23][24][25].…”

“…Palygorskite (Pal) is a type of clay with a unique threedimensional structure and fibrous morphology, exhibiting chemical and thermal stability, high aspect ratio, large specific surface area (150-200 m 2 /g), and mechanical strength [1,2] [3]; the clay structure is composed of octahedral and tetrahedral units of silicates that form interconnected channels with dimensions of 3.7 × 10.6Å. Substitutions of Si for Al atoms in the tetrahedral units provide to clay a cation exchange capacity (CEC) ranging from 20 to 30 meq/100 g [2].…”

Polystyrene/attapulgite nanocomposites prepared via in situ suspension polymerization with redox initiation system

“…The peak at 1650 cm 21 is attributed to hydroxyl groups of zeolite water. 44 The two sharp absorption peaks at 1029 and 982 cm 21 correspond to the stretching vibration of SiAOASi bond. 45 Compared with the spectra of pure ATP, in the spectra of M-ATP [ Figure 2(c)], the peak at 1519 cm 21 represents the skeletal vibration of aromatic ring.…”

Preparation and properties of polycarbonate nanocomposites using attapulgite grafted poly(methyl methacrylate) as a potential nanofiller

“…[20][21][22][23] Meanwhile, ATP has attracted much attention as polymer enforcement, polymer materials such as epoxy resins, polyaniline, polyamide-6, and polypropylene have been widely used as matrices in the design of polymer/ATP nanocomposites. [24][25][26][27] However, as reasonable nanofiller with few reports devoted to the nanocomposites of PC. Gao et al 28 prepared ternary ATP/PP/PC nanocomposites with core-shell morphology via two-step melt blending process.…”