Effect of poly(diallyldimethylammonium chloride) adsorption on the dispersion features of SiC particles in aqueous media

Niu, Yifan; Zhang, Wenxiao; Zhai, Chaoyang; Liu, Jiaxiang

doi:10.1039/d1nj00062d

Cited by 6 publications

(5 citation statements)

References 55 publications

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“…Compared with other dispersants, the modified SiC slurry by SL had the lower viscosity at the same or higher solid loading. Without doubt, the dispersion of SiC powder modified by SL was the best. ,− …”

Section: Resultsmentioning

confidence: 98%

“…Indeed, it is impractical to maintain the stability of high-concentrated slurry only by electrostatic effect . Hence, polyelectrolyte is one of the most used dispersants of ceramic powder, which can achieve slurry stability by both electrostatic and steric effects. , Anionic polyelectrolytes, such as polycarboxylate (PC), are widely used for the dispersion of metallic oxide powders such as Al 2 O 3 and TiO 2 . , However, the effectiveness of polycarboxylate-based dispersants is limited for SiC powder because of the lower adsorption capacity on a negatively charged surface. , Compared with anionic polyelectrolytes, cationic polyelectrolytes, such as polyethylene imine (PEI) and polydially dimethylammonium chloride (PDADMAC), can be well absorbed on the particle surface to improve the dispersion of SiC powder. , Nevertheless, cationic dispersants are rarely applied in the industry due to high cost . Thus, it is necessary to develop a more effective new dispersant used for SiC powder.…”

Section: Introductionmentioning

confidence: 99%

“…17,18 Compared with anionic polyelectrolytes, cationic polyelectrolytes, such as polyethylene imine (PEI) and polydially dimethylammonium chloride (PDADMAC), can be well absorbed on the particle surface to improve the dispersion of SiC powder. 19,20 Nevertheless, cationic dispersants are rarely applied in the industry due to high cost. 21 Thus, it is necessary to develop a more effective new dispersant used for SiC powder.…”

Section: ■ Introductionmentioning

confidence: 99%

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Adsorption and Dispersion Effect of Sodium Lignosulfonate on Fine SiC Particles in Aqueous Media

Zhang,

Zheng

et al. 2023

Langmuir

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This study presented a novel modification method for fine SiC powder by using sodium lignosulfonate as a dispersant. The adsorption behavior of sodium lignosulfonate on the SiC/water interface and its effect on the performance of a fine SiC slurry were systematically investigated. The adsorption results showed that sodium lignosulfonate formed monolayer adsorption on the surface of fine SiC and that the saturated adsorption capacity was 1.3263 mg/g. The adsorption reached equilibrium within 3 h and was mainly controlled by active sites on the SiC surface. The dispersion, stability, and zeta potential of modified SiC powder were improved after sodium lignosulfonate adsorption. The zeta potential of modified SiC reached a minimum value of −44.8 mV at pH 12. Modified SiC suspensions had great stability in a wider pH range of 6− 12. Modified SiC slurry with 54 vol % solid loading had a low viscosity of 173 mPa•s at pH 10. Subsequently, coarse SiC powder was added for slip casting. A mixed slurry with high solid loading (69 vol %) and low viscosity (583 mPa•s) was prepared using modified SiC and coarse SiC powders at a mass ratio of 2:3. Finally, recrystallized SiC green body with high density (2.6492 g/cm 3 ) was obtained.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption and Dispersion Effect of Sodium Lignosulfonate on Fine SiC Particles in Aqueous Media

Zhang,

Zheng

et al. 2023

Langmuir

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“…As a class of critical functional polymers, cationic quaternary ammonium salt polymers are extensively applied in industrial production and daily life, such as in petrochemical, wastewater treatment, textile printing and dyeing, and daily chemical industries [ 1 , 2 , 3 , 4 ]. As a typical cationic polyelectrolyte, dimethyl diallyl ammonium chloride (DMDAAC) is widely studied and applied [ 5 , 6 , 7 , 8 ]. Nevertheless, studies have illustrated that during the application process, the two methyl groups attached to the quaternary ammonium nitrogen of DMDAAC cause its polymer, poly (dimethyl diallyl ammonium chloride) (PDMDAAC), to have a weak affinity for fatty substances, which limits its application in the lipophilic field [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Demulsification Properties of Poly (DMDAAC-co-DAMBAC) (9:1) Copolymer

et al. 2023

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Utilizing the copolymerization modification of dimethyl diallyl ammonium chloride (DMDAAC), the high positive charge density of the copolymer could be maintained, thereby facilitating the deficiency of its monomer in the application. In this paper, poly (DMDAAC-co-DAMBAC) (9:1) was synthesized with an aqueous polymerization method using DMDAAC and methyl benzyl diallyl ammonium chloride (DAMBAC) as monomers and 2,2’-azobis [2-methylpropionamidine] dihydrochloride (V50) as an initiator. Targeted to the product’s weight-average relative molecular mass (Mw), the response surface methodology (RSM) was used to optimize the preparation process. The optimal process conditions were obtained as follows: w (M) = 80.0%, m (V50):m (M) = 0.00700%, m (Na4EDTA):m (M) = 0.00350%, T1 = 50.0 °C, T2 = 60.0 °C, and T3 = 72.5 °C. The intrinsic viscosity ([η]) of the product was 1.780 dL/g, and the corresponding double bond conversion (Conv.) was 90.25 %. Poly (DMDAAC-co-DAMBAC) (9:1) revealed a highest Mw of 5.637 × 105, together with the polydispersity index d (Mw/Mn) as 1.464. For the demulsification performance of simulated crude oil O/W emulsions, the demulsification rate of poly (DMDAAC-co-DAMBAC) (9:1) could reach 97.73%. Our study has illustrated that the copolymerization of DMDAAC and a small amount of DAMBAC with poor reactivity could significantly improve the relative molecular weight of the polymer, enhance its lipophilicity, and thus the application scope of the polymer.

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“…As a typical cationic polyelectrolyte, poly dimethyl diallyl ammonium chloride (PDADMAC) exhibits desirable properties such as excellent aqueous dispersion, high positive charge density, non-toxicity to environmental organisms, and rapid self-assembly of the material. [25] PDADMAC also has the advantage of acting as a stabilizing polymer and undergoes structural changes only in response to extreme pH values, high temperatures, or intense UV radiation. [26] Therefore, PDADMAC is widely used as an excellent stabilizer.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Zein/PDADMAC Nanoparticles to Encapsulate Tebuconazole by Antisolvent Precipitation Method**

Liu,

Shi,

et al. 2023

ChemistrySelect

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In order to improve the sustained release effect and antifungal activity of tebuconazole (TEB), zein /poly dimethyl diallyl ammonium chloride (PDADMAC) nanoparticles (NPs) were prepared in this study. The hollow zein NPs were made by anti‐solvent precipitation method in which sodium carbonate was chosen as sacrificial template, and PDADMAC was combined with zein NPs via electrostatic self‐assembly after loading TEB. The NPs were characterized through particle size, Zeta potential, scanning electron microscopy (SEM), sustained release effect, contact angle, encapsulation efficiency (EE), loading efficiency (LE) and antifungal activity. In this study, TEB/zein/PDADMAC NPs were stable for at least 28 days at room temperature. The release of TEB showed lower release in NPs compared with technical concentrate (TEB TC, 98 %). In addition, NPs also significantly influenced performance such as wetting performance and antifungal activity. The developed functional TEB/zein/PDADMAC NPs with excellent properties can be promising for antifungal pesticide applications.

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Effect of poly(diallyldimethylammonium chloride) adsorption on the dispersion features of SiC particles in aqueous media

Abstract: Silicon carbide (SiC) is widely used as an advanced ceramic material, but the dispersion of concentrated SiC suspension is difficult. In this work, poly (diallyldimethyl ammonium chloride) (PDADMAC) was used...

Cited by 6 publications

References 55 publications

Adsorption and Dispersion Effect of Sodium Lignosulfonate on Fine SiC Particles in Aqueous Media

Adsorption and Dispersion Effect of Sodium Lignosulfonate on Fine SiC Particles in Aqueous Media

Synthesis and Demulsification Properties of Poly (DMDAAC-co-DAMBAC) (9:1) Copolymer

Fabrication and Characterization of Zein/PDADMAC Nanoparticles to Encapsulate Tebuconazole by Antisolvent Precipitation Method**

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