Surface modification to produce hydrophobic nano-silica particles using sodium dodecyl sulfate as a modifier

Qiao, Bing; Liang, Yong; Wang, Ting-Jie; Jiang, Yanping

doi:10.1016/j.apsusc.2015.12.116

Cited by 85 publications

(41 citation statements)

References 41 publications

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“…26 In order to overcome this problem, the inorganic llers are subjected to surface modication to improve their adhesion to the organic matrix. [27][28][29][30] Surface modication can increase the interfacial adhesion strength by increasing the surface tension and roughness or changing the surface chemistry of llers. [31][32][33] Recently, Yuan and Cui et al found that CSWs coated by crosslinked polyvinyl alcohol (PVA) or chitosan (CS) greatly improved the tensile and impact properties of CSW/PVC composites, which could be attributed to the good affinity between PVC and PVA or CS molecules coated on the surface of CSWs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Zhang

et al. 2017

RSC Adv.

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Six new polyether titanate coupling agents with different polyethyleneglycol (PEG) segment lengths were prepared in this study and were then used to modify calcium sulfate whiskers (CSWs) in order to improve the compatibility between CSWs and poly(vinyl chloride) (PVC). The chemical structure of these coupling agents was characterized by FTIR, Raman, 1 H NMR and 31 P NMR, and the surface properties of CSWs modified by the coupling agents (mCSWs) were characterized by FTIR, SEM-EDS and XPS. Then, CSW/ PVC and mCSW/PVC composites were prepared using a two-roll mill, and their mechanical and thermal properties were characterized to investigate the effects of the PEG segment length of the coupling agents on the performance and compatibility of the composites. The results show that the new coupling agents can significantly improve the compatibility and the interfacial adhesion between CSWs and the PVC matrix, which results in a significant improvement of the comprehensive performance of mCSW/ PVC composites. PEG4000 shows the best modification effect on CSWs. Finally, the underlying mechanisms are discussed.

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Section: Introductionmentioning

confidence: 99%

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Zhang

et al. 2017

RSC Adv.

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“…The modification was performed using SDS via thermal and drying technique. According to Qiao et al (2016), the suitable ratio for the modification process was in the range of 0 to 75 wt%. In this study, there were two SDS/SiO 2 ratio used to determine the contact angle difference, i.e.…”

Section: Resultsmentioning

confidence: 99%

“…The material used for this modification process is Sodium Dodecyl Sulphate (SDS). The ratio of SDS/SiO 2 was set at 50 wt% based on literature (Qiao, Liang et al 2016). Firstly, SDS was added into 150 ml deionized water in a conical flask.…”

Section: Modification Of Nanosilica Surfacementioning

confidence: 99%

Hydrophobic Nanosilica as Fluid Loss Control Additive for High Performance Water- Based Drilling Fluids

Saparti¹,

Jali²,

Rohani³

et al. 2018

JKUKM

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Water-based drilling fluids (WBDF) are widely applied in oil and gas industry due to its environmental compatibility. However, the issues regarding on the fluid loss control is still a major concern in drilling fluid industry. Therefore, the introduction of nanomaterials in drilling fluids is one of the advanced approaches to solve the problems. Nanomaterials possess inherent physico-chemical properties compared to micro or macro-sized particles due to its large surface area. In this study, nanosilica particles have been selected as fluid loss control additive due to its high stability and functionality. The nanosilica particles were synthesized via sol-gel technique and the average size obtained was 70 ± 7 nm. The nanosilica was then modified using Sodium Dodecyl Sulphate (SDS) in order to produce hydrophobic particles. It was done in order to produce hydrophobic layer that can prevent fluid inflow-outflow in order to stabilize the wellbore during drilling operation by producing a filtration layer on the wall of the wellbore which overcome the fluid loss. A ratio of 50 wt% SDS/SiO 2 was used and the contact angle obtained was 100 ± 8.13°. The hydrophobic nanosilica was added in the drilling fluid formulation and the performance was evaluated in terms of filter cake thickness and filtrate volume. The filter cake thickness was found less than 1 mm and the fluid loss reduction percentage was 44% for drilling fluid with hydrophobic nanosilica. Besides, the drilling fluids with hydrophobic nanosilica presented a good rheological behaviour, thermal stability and a high methylene blue capacity while the filtrates exhibited low alkalinity, low chloride ion concentration and total hardness lower than 500 mg/L.

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“…However, they easily aggregate due to the large specific surface area and rich surface hydroxyl groups, which results in their uneven dispersion in systems and then affects their use . In order to improve the dispersity and stability of SiO 2 nanoparticles, methods of adding surfactant or grafting silane coupling agent or polymer on the surface of the particles are usually used . However, these studies mainly focus on improving the dispersity of SiO 2 nanoparticles in organic solvents or polymer matrices; moreover, the nano‐SiO 2 content in these systems is very low.…”

Section: Introductionmentioning

confidence: 99%

Photopolymerization synthesis of polyacrylic acid dispersant with methoxysilicon end groups and its application in a nano‐SiO₂ aqueous system

Zhou

et al. 2018

Polymer International

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In order to improve the dispersity and stability of the nano‐SiO2 aqueous system with high solid content, a kind of polyacrylic acid dispersant with methoxysilicon end groups (KH590‐PAA) was synthesized by photopolymerization of acrylic acid (AA) initiated with (3‐mercaptopropyl)trimethoxysilane (KH590). After adding KH590‐PAA into the nano‐SiO2 aqueous dispersion system (20 wt% solid content), the viscosity and the curing time of the system were measured with a rotational viscometer and the inverted bottle method. Moreover, the dispersion mechanism of KH590‐PAA for the nano‐SiO2 aqueous system was researched by measuring the adsorption capacity, the particle size and the zeta potential of the nanoparticles with a conductivity meter, dynamic light scattering, SEM and TEM, respectively. The results showed that the methoxysilicon groups in KH590‐PAA could react with hydroxyl groups on the surface of nano‐SiO2 in the process of stirring, which enhanced the adsorption capacity of the dispersant and then increased the surface charge of the particles. Therefore, electrostatic repulsion and steric hindrance effects between the SiO2 nanoparticles could be further enhanced by adding the KH590‐PAA dispersant, and then the nano‐SiO2 aqueous system exhibited better dispersity and stability. Besides, the dispersion properties of SiO2 nanoparticles in water were closely related to the addition amount and the molecular weight of the KH590‐PAA dispersant. © 2018 Society of Chemical Industry

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Surface modification to produce hydrophobic nano-silica particles using sodium dodecyl sulfate as a modifier

Cited by 85 publications

References 41 publications

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Hydrophobic Nanosilica as Fluid Loss Control Additive for High Performance Water- Based Drilling Fluids

Photopolymerization synthesis of polyacrylic acid dispersant with methoxysilicon end groups and its application in a nano‐SiO₂ aqueous system

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Surface modification to produce hydrophobic nano-silica particles using sodium dodecyl sulfate as a modifier

Cited by 85 publications

References 41 publications

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Synthesis of new polyether titanate coupling agents with different polyethyleneglycol segment lengths and their compatibilization in calcium sulfate whisker/poly(vinyl chloride) composites

Hydrophobic Nanosilica as Fluid Loss Control Additive for High Performance Water- Based Drilling Fluids

Photopolymerization synthesis of polyacrylic acid dispersant with methoxysilicon end groups and its application in a nano‐SiO2 aqueous system

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Product

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Photopolymerization synthesis of polyacrylic acid dispersant with methoxysilicon end groups and its application in a nano‐SiO₂ aqueous system