Structure–Property Relationships of Hyperbranched Polymer/Kaolinite Nanocomposites

Omara, Shereen; Rehim, Mona H. Abdel; Ghoneim, Ahmed; Madkour, Sherif; Thünemann, Andreas F.; Turky, Gamal; Schönhals, Andreas

doi:10.1021/acs.macromol.5b01693

Cited by 25 publications

(14 citation statements)

References 159 publications

(332 reference statements)

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“…Figure 1f shows the 1 H NMR results of the freeze-dried OMMT/HBPA emulsion. From Figure 1f, it was observed that the obtained results were consistent with the results obtained in the literature (Hong and Pan 2001;Lligadas and Percec 2007;Omara et al 2015) and the characteristics of HBPA existed. It was further observed that the signals of the protons of the main chains HBPA (CH 3 /-CH 2 -) were present in the regions of 1.30-2.70 ppm.…”

Section: Characterization Of Ommt/hbpa Emulsionsupporting

confidence: 90%

“…The first step of the experiment was to prepare OMMT/hyperbranched basal polymer (HBBP). The parameters that are necessary for the synthesis were determined based on the literature (Kuang et al 2010;Liu et al 2016;Omara et al 2015) and a large number of prior experiments were conducted in order to ensure the process. The DEA was dissolved in methanol.…”

Section: Synthesis Of Waterborne Ommt/hbpa Emulsionmentioning

confidence: 99%

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Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Ling

et al. 2020

Holzforschung

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In this work, a novel waterborne hyperbranched polyacrylate (HBPA) dispersed organo-montmorillonite (OMMT) emulsion was synthesized and used for the treatment of wood in a vacuum environment in order to enhance the physical and mechanical properties of the wood. The sapwood of Cathay poplar (Populus cathayana Rehd.) and Radiata pine (Pinus radiata D.Don) were used as the samples for experimentation. The results showed that the physical and mechanical properties of the wood improved significantly due to the successful penetration of the OMMT and HBPA into the wood cell wall. From it was also observed that OMET completely exfoliated from the HBPA matrix and formed a hydrophobic film covering on the inside walls of the cell lumen. Further, it was observed that the poplar sample displayed better mechanical properties than the pine sample because the pine has a more compact structure when compared to poplar and contains rosin. Furthermore, it was also observed that the mechanical properties of the modified wood sample gradually improved with an increase in the concentration of the emulsion. However, excessive concentration (>4 wt%) did not lead to further improvement.

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Section: Characterization Of Ommt/hbpa Emulsionsupporting

confidence: 90%

Section: Synthesis Of Waterborne Ommt/hbpa Emulsionmentioning

confidence: 99%

Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Ling

et al. 2020

Holzforschung

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“…The first step was to prepare OMMT/hyperbranched basal polymer (HBBP) according to Omara et al [ 27 ] The DEA was dissolved in methanol. Afterwards, it was mixed with MMA at mole ratio of 1:1.2 and OMMT at a mass ratio of 6:1.…”

Section: Methodsmentioning

confidence: 99%

Wood composites modified with waterborne hyperbranched polyacrylate dispersed organo‐montmorillonite emulsion and the permeability investigations by surface characterizations

Ling

et al. 2020

Polymer Composites

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A novel waterborne hyperbranched polyacrylate (HBPA) dispersed organo‐montmorillonite (OMMT) emulsion was synthesized in laboratory. The sapwood of Cathay poplar (Populus cathayana Rehd.) was modified with the emulsion via vacuum treatment for polymer impregnated wood composite with cross section sealing off. Some surface characterization was carried out to analyze the impregnation depth. The results showed that OMMT and HBPA successfully penetrated into the wood cell wall with completely exfoliated OMMT and formed a hydrophobic film covering on the inner surface of cell wall lumen, which improved the surface hydrophobicity and mechanical properties of wood cell wall. With increasing impregnation depth, the improvements decreased, which was associated with the limited impregnation ability of the modifiers only with the pathway of radial and tangential sections. Thus, for better modification, the cross section of the wood must be unobstructed.

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“…Researches on organic-inorganic hybrid materials have been thriving over the past few years because these materials combined the structural, physical and chemical properties of both inorganic host materials and organic guest species 1–3 . Intercalation reaction of natural layered minerals is a well-known method for preparing hybrid materials in a nanoscale 4–6 . Kaolinite, a 1:1 type layered aluminosilicate, has received considerable attentions due to its natural “Janus” structure 7–10 .…”

Section: Introductionmentioning

confidence: 99%

Efficient preparation of kaolinite/methanol intercalation composite by using a Soxhlet extractor

2019

Sci Rep

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Kaolinite/methanol intercalation composite (KMe) is a key precursor for preparing clay-based inorganic/organic hybrid materials and kaolinite nanoscrolls. However, synthesis of KMe is a time and methanol dissipative process and the complexity of this process also limits its further applications. In this study, Soxhlet extractor was introduced to synthesize an intercalation composite and KMe was efficiently synthesized in a Soxhlet extractor through a continuous displacement process by using kaolinite/DMSO intercalation composite (KD) as a precursor. The formation process of kaolinite/methanol intercalation composite was studied by X-ray diffraction (XRD) and infrared spectroscopy (IR). The results showed that the DMSO in kaolinite could be completely displaced by methanol in this process and the preparation of KMe could be completed in 8 hours, which was far faster than the reported methods. Moreover, methanol used in this process could be recycled. Furthermore, the resulting material could be successfully used to prepare kaolinite nanoscrolls in high yield.

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Structure–Property Relationships of Hyperbranched Polymer/Kaolinite Nanocomposites

Cited by 25 publications

References 159 publications

Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Enhancement of the physical and mechanical properties of wood using a novel organo-montmorillonite/hyperbranched polyacrylate emulsion

Wood composites modified with waterborne hyperbranched polyacrylate dispersed organo‐montmorillonite emulsion and the permeability investigations by surface characterizations

Efficient preparation of kaolinite/methanol intercalation composite by using a Soxhlet extractor

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