Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

Abstract

Dickite particles were modified by silane coupling agent, hexadecyl phosphate, oleic acid, and stearic acid (SA), respectively. Modified dickite was composed with linear low-density polyethylene (LLDPE) to prepare a series of LLDPE/modified dickite composites. Hydrophilicity of modified dickite was characterized by dispersion experiments and contact angle tests. The results indicated that hydrophilicity of modified dickite decreases sharply, compared with nonmodified dickite. Among four modifying agents, SA had obvious effect on hydrophobic modification of dickite. Fourier-transform infrared spectra results suggested that chemical bonding between modifying agent and dickite was beneficial to the hydrophobic modification. Results of salt spray tests illustrated that the introduction of modified dickite into LLDPE improved the anticorrosion properties of the polymer universally. The anticorrosion mechanism of LLDPE/modified dickite was analyzed by scanning electron microscope micrograph. The mechanical properties of the resultant composites displayed a fact of reinforcement of modified dickite.

Preparation of Cu/Dickite/LLDPE nanocomposites and synergistic effect of exfoliated dickite and nano-Cu in LLDPE matrix

“…Nonexfoliated dickite aggregates and intercalated thin tactoids are prone to parallel to the nanocomposite surface. This observation is similar to the case of dickite/LLDPE microcomposite we prepared previously . Bigger layered particles in composite are prone to be oriented at the process of hot press formation.…”

“…Meanwhile, it has been pointed out that the properties of polymer/clay nanocomposites also depend on the type of used clay . In our previous study, we found that another clay dickite was also an excellent filler to prepare polymer/clay composites . The experiment results revealed that the resulting dickite/ linear low‐density polyethylene (LLDPE) nanocomposites also possessed better barrier properties.…”

Development of bio‐based magnesium phosphate flame retardant for simultaneously improved flame retardancy, smoke suppression and mechanical properties of HDPE

“…The cracks are conducive to the penetration of flame and combustible gas, and CO and CO 2 generated by combustible decomposition are also easy to diffuse outward through the cracks. 37 Therefore, although the addition of MHPA can play a role in flame retardancy, there are still defects that make the improvement of flame retardancy limited. To improve this situation, the introduction of MH will play a positive role.…”

The effect of alkali treatment and organic modification of diatomite on the properties of diatomite composite separators

“…Therefore, the intensity of the 3450 cm À1 band related to the adsorbed water was increased. After organic modification, the FTIR spectra of O-D and OA-D showed the asymmetric and symmetric CH 2 stretching at 2925 and 2852 cm À1 , 18 indicating that the MPS modifier was grafted onto the surface of diatomite. Fig.…”