A novel hybrid filler of halloysite nanotubes/silica fabricated by electrostatic self-assembly

Hu, Dechao; Zhong, Bangchao; Jia, Zhixin; Lin, Jing; Liu, Maolin; Luo, Yuanfang; Jia, Demin

doi:10.1016/j.matlet.2016.08.144

Cited by 25 publications

(17 citation statements)

References 11 publications

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“…However, the dye rejection ratio for M3 still remained high with a value of 88.1% after adding β‐CD‐HNT additives. The explanations were as follows: on one hand, many reports demonstrated that HNTs emerged negative charge at different pH value . As a result, blending β‐CD‐HNTs could also make PVDF membrane surface having negative charge, which had an electrostatic repulsion with negative dyes .…”

Section: Resultsmentioning

confidence: 99%

“…The explanations were as follows: on one hand, many reports demonstrated that HNTs emerged negative charge at different pH value. [40][41][42] As a result, blending β-CD-HNTs could also make PVDF membrane surface having negative charge, which had an electrostatic repulsion with negative dyes. 13 On the other hand, both β-CD and HNTs have been used as adsorbents for rapid removal of organic pollutants from water due to their high-surface-area and abundant hydroxyl groups.…”

Section: Dye Rejection Experimentsmentioning

confidence: 99%

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High‐flux PVDF membrane incorporated with β‐cyclodextrin modified halloysite nanotubes for dye rejection and Cu (II) removal from water

Yang

et al. 2018

Polymers for Advanced Techs

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The application of polyvinylidene fluoride (PVDF) membrane is impeded by its intrinsic hydrophobic property. In this work, a series of novel membranes were fabricated by blending different contents of β‐cyclodextrin modified halloysite nanotubes (β‐CD‐HNTs) into the casting solution. Elemental mapping images confirmed the good dispersion of β‐CD‐HNTs in the PVDF membrane matrix. The microstructure of membrane was improved as revealed by the morphological characterizations. Besides, the permeation and separation performances of all membranes were extensively studied. The results demonstrated that as‐prepared blend membranes exhibited better hydrophilicity, which included lower contact angle and higher water flux than pristine PVDF membrane. In the separation experiments, the dye rejection for the blend membranes was not declined (85%‐90%), even though the pore size of membranes was increased with the addition of β‐CD‐HNT nanoparticles. More importantly, because of the chelation reaction between β‐CD‐HNTs and heavy metal, the removal ratio of Cu (II) for 3 wt.% content of blend membrane could reach 20.9%, compared with unmodified membrane of 4.2%. After 3 filtration cycles, blend membranes showed superior antifouling property. Overall, this method demonstrated very promising characteristics for removing different scales of pollutants using membrane technology.

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Section: Resultsmentioning

confidence: 99%

Section: Dye Rejection Experimentsmentioning

confidence: 99%

High‐flux PVDF membrane incorporated with β‐cyclodextrin modified halloysite nanotubes for dye rejection and Cu (II) removal from water

Yang

et al. 2018

Polymers for Advanced Techs

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“…TEOS, which was submitted to the hydrolysis/condensation process, was used to in situ prepare the SiO 2 on the cellulose nanocrystal, and the theoretical mass ratio of CNC and SiO 2 was 4:1. The sol–gel method used the previous studies as references [ ]. Firstly, the solvent exchange from water to ethanol of the neutralized CNC suspensions collected from above process was prepared by continual centrifugation.…”

Section: Methodsmentioning

confidence: 99%

In situ fabrication of cellulose nanocrystal‐silica hybrids and its application in UHMWPE: Rheological, thermal, and wear resistance properties

Huang

et al. 2017

Polymer Composites

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Novel cellulose nanocrystal (CNC)‐silica (SiO2) nanohybrids with a better thermal stability were successfully fabricated by sol–gel method. In this unique hybrid architecture, it was found that silica particles were uniformly adsorbed/anchored by the CNC via covalent bonding and hydrogen bonding. Subsequently, the nanocomposites containing nanofillers (CNC‐SiO2 nanohybrids or CNC), ultrahigh molecular weight polyethylene (UHMWPE), polyethylene glycol (PEG), were prepared by the twin screw extrusion and their properties and structure were systematically investigated. With the incorporation of CNC‐SiO2 nanohybrids (or CNC) into the UHMWPE matrix, the tensile strength, flexural strength, flexural modulus, vicat softening temperature, and crystallinity of the ensuing nanocomposites were significantly increased. Meanwhile, the nanofiller could enhance the wear resistance of UHMWPE. Notably, compared to CNC, the unique beaded structure of CNC‐SiO2 nanohybrids could endow the UHMWPE with an overall superior performance. POLYM. COMPOS., 39:E1701–E1713, 2018. © 2017 Society of Plastics Engineers

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“…The improvements of physical and other related properties of rubber depend on several factors, such as the filler aspect ratio, filler's compatibility, the degree of dispersion, and the alignment of the particulates. Halloysite nanotubes (HNT) are a type of nanofiller that has been recently tested in many types of matrix [4][5][6][7]. This is because of the very special characteristics of this material formed by surface weathering of aluminosilicate minerals and composed of aluminum, silicon, hydrogen, and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Maleated Natural Rubber and Modified Palm Stearin as Dual Compatibilizers in Composites based on Natural Rubber and Halloysite Nanotubes

et al. 2020

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The performance of rubber composite relies on the compatibility between rubber and filler. This is specifically of concern when preparing composites with very different polarities of the rubber matrix and the filler. However, a suitable compatibilizer can mediate the interactions. In this study, composites of natural rubber (NR) with halloysite nanotubes (HNT) were prepared with maleated natural rubber (MNR) and modified palm stearin (MPS) as dual compatibilizers. The MPS dose ranged within 0.5–1.5 phr, while the MNR dose was fixed at 10 phr in all formulations. It was found that the mixed MNR/MPS significantly enhanced modulus, tensile strength, and tear strength of the composites. The improvements were mainly due to improved rubber-HNT interactions arising from hydrogen bonds formed in the presence of these two compatibilizers. This was clearly verified by observing the Payne effect. Apart from that, the MPS also acted as a plasticizer to provide improved dispersion of HNT. It was clearly demonstrated that MNR and MPS as dual compatibilizers improved rubber-HNT interactions and reduced filler-filler interactions, which then improved tensile and tear strengths, as well as dynamical properties. Therefore, the mix of MNR and MPS had a great potential to compatibilize non-polar rubber with HNT filler.

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A novel hybrid filler of halloysite nanotubes/silica fabricated by electrostatic self-assembly

Cited by 25 publications

References 11 publications

High‐flux PVDF membrane incorporated with β‐cyclodextrin modified halloysite nanotubes for dye rejection and Cu (II) removal from water

High‐flux PVDF membrane incorporated with β‐cyclodextrin modified halloysite nanotubes for dye rejection and Cu (II) removal from water

In situ fabrication of cellulose nanocrystal‐silica hybrids and its application in UHMWPE: Rheological, thermal, and wear resistance properties

Synergistic Effect of Maleated Natural Rubber and Modified Palm Stearin as Dual Compatibilizers in Composites based on Natural Rubber and Halloysite Nanotubes

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