Preparation of Polymer Composite Latex via Miniemulsion Polymerization: Fluorinated Acrylate as Co-Stabilizer and Functional Modifier

2013 ◽  
Vol 750-752 ◽  
pp. 200-203
Author(s):  
Fu Chun Zhao ◽  
Shuang Quan Liao ◽  
Yan Fang Zhao ◽  
Hai Sheng Tan ◽  
Nai Xu
Keyword(s):  
Contact Angle ◽  
Fourier Transformation ◽  
Miniemulsion Polymerization ◽  
High Moisture ◽  
Acrylate Monomer ◽  
Water Contact ◽  
Laser Scattering ◽  
Fluorinated Acrylate ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Resultant Film

The silica/polyacylate composite latex was prepared via miniemulsion polymerization. Fluorinated acrylate monomer was used the co-stabilizer and hydrophobic modifier. The effect of fluorinated acrylate on stability of the composite latex was compared with the traditional co-stabilizer. The composite latex and the resultant film were characterized by Fourier transformation infrared spectroscopy, Dynamic laser scattering, Water contact angle. Fluorinated acrylate can stabilize the miniemulsion polymerization as the co-stabilizer and the resultant film has good durability of hydrophobicity under high moisture environments.

Study on Preparation and Surface Properties of Fluorinated Acrylate Hydrophobic Polymer Film

2015 ◽  
Vol 1088 ◽  
pp. 101-106
Author(s):  
Jing Chen ◽  
Qian Cheng ◽  
Shun Quan Chen
Keyword(s):  
Contact Angle ◽  
Water Content ◽  
Polymer Film ◽  
Water Contact ◽  
Fluorinated Acrylate ◽  
Fluorinated Polyacrylate ◽  
Hydrophobic Polymer ◽  
Air Interface ◽  
Surface Morphologies ◽  
Lower Water Content

A new fluorinated acrylate terpolymer hydrophobic polymer was prepared by emulsifier-free inverse microemulsion polymerization using methyl methacrylate (MMA) and hexafluorobutyl acrylate (HFBA) as monomers, and methyl polyethylene glycol methacrylate (MPEGMA) as polymerizable emulsifier. Membrane properties were characterized by means of FT-IR, SEM and Contact Angle Meter. The effect of fluorinated monomer content, water content in the inverse precursor microemulsion on the surface morphologies and hydrophobicity of the polymer film was mainly discussed. Morphological studies of the fluorinated polyacrylate polymers by SEM showed that discrete granular microstructures were obtained from precursor microemulsion with higher water content. On the other hand, smooth and continuous surface morphologies were found with lower water content. Contact angle revealed that the fluorine preferentially enriched at the film-air interface and more hydrophobic that the film-glass interface. The amount of HFBA had significantly effects on the film properties. The water contact angle of the film-air interface increased as the amount of HFBA increased from 0 ml to 4 ml and then remained almost unchangeable. The film formed from the fluorinated polyacrylate polymer with higher water content in the precursor microemulsion exhibited better hydrophobicity in comparison with the film formed from the fluorinated polyacrylate polymer with the lower water content, and it confirmed that rough surface have high water contact angles.

Synthesis of Novel Anionic Fluorinated Polyacrylate Emulsion and its Application in Leather Waterproofing

2012 ◽  
Vol 496 ◽  
pp. 511-514
Author(s):  
Wei Xu ◽  
Li Fen Hao
Keyword(s):  
Contact Angle ◽  
Processing Time ◽  
Processing Parameters ◽  
Single Factor ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Fluorinated Acrylate ◽  
Fluorinated Polyacrylate ◽  
Acrylate Emulsion ◽  
Emulsion Processing

Novel anionic fluorinated polyacrylate emulsion (FLHA) was synthesized and characterized using Infrared spectrum (IR). Then it was used as waterproofing agent to treat wet blue leather and the effects of various parameters, such as dose of fluorinated acrylate emulsion, processing time, temperature, etc., on hydrophobic property of the treated crust leather were also investigated using single factor experimental method. Results showed that water contact angle (WCA) on the grain and flesh layers of the resultant leather had similar rule controled by dose of the FLHA, processing time and temperature and increased with augment of those factors. The most preferable processing parameters of the above factors were 6% (based on the weight of the treated wet blue leather), 60 minutes and 30 °C, repectively. Thus, WCA on the grain and flesh layers of the resultant leather could attain 130° and 136°.

Preparation and Application of Novel Cationic Fluorinated Polyacrylate Latex in Leather Waterproofing

2012 ◽  
Vol 496 ◽  
pp. 515-518 ◽  
Author(s):  
Wei Xu ◽  
Li Fen Hao
Keyword(s):  
Contact Angle ◽  
Infrared Spectrum ◽  
Processing Time ◽  
Processing Parameters ◽  
Single Factor ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Fluorinated Acrylate ◽  
Fluorinated Polyacrylate ◽  
Acrylate Latex

Novel cationic fluorinated polyacrylate latex was synthesized and characterized using Infrared spectrum (IR). Then it was utilized as waterproofing agent to treat wet blue leather and the effects of various parameters, such as dose of fluorinated acrylate latex, processing time, temperature, etc., on hydrophobic property of the treated crust leather were also investigated using single factor experimental method. Results showed that water contact angle (WCA) on the grain and flesh sides of the resultant leather possessed similar rule controled by dose of the CFBDH, processing time and temperature and increased with augment of those factors. The most preferable processing parameters of the above factors were individually 6% (based on the weight of the treated wet blue leather), 60 minutes and 30 °C. Thus, WCA on the grain and flesh sides of the resultant leather could attain 136° and 143°.

Preparation and Characterization of Fluorinated Acrylate Copolymer Emulsion

2015 ◽  
Vol 731 ◽  
pp. 541-546
Author(s):  
Chun Yan Lu ◽  
Guo Rong Cao
Keyword(s):  
Contact Angle ◽  
Shell Structure ◽  
Fourier Transforms ◽  
Sodium Dodecyl ◽  
Raw Material ◽  
Core Shell ◽  
Acrylate Monomer ◽  
Fluorinated Acrylate ◽  
Acrylate Copolymer ◽  
Core Shell Structure

A fluorinated acrylate copolymer emulsion with core-shell structure was synthesized by semi-continuous emulsion polymerization using methyl methacrylate (MMA ), butyl acrylate (BA) as the raw material, hexafluorobutyl methacrylate as fluorinated acrylate monomer, ammonium persulfate (APS) as initiator, sodium dodecyl sulfate (SDS) and polyoxyethylene octyl phenyl ether (OP-10) as emulsifier and taking water as dispersion medium. The as-prepared latexes are characterized by Fourier transforms infrared (FT-IR) spectroscopy. The hydro-oleophobic of copolymer is determined by contact angle meter. The typical core-shell structure is proved by differential scanning calorimetry (DSC). The results show that the copolymer emulsion has good hydro-oleophobic when the content of hexafluorobutyl methacrylate is 15%, used the delay loading method, the water contact angle of the coating surface is 104 °, the hexadecane contact angle is 75 °. Key words: fluorinated acrylate; copolymer; emulsion; hydro-oleophobic; contact angle

scholarly journals Combination of polyethylene glycol impregnation and paraffin heat treatment to protect round bamboo from cracking

2019 ◽  
Vol 6 (11) ◽  
pp. 190105
Author(s):  
Jin Rao ◽  
Jun Jiang ◽  
Nayebare Kakwara Prosper ◽  
Xiushu Yang ◽  
Tingsong Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Contact Angle ◽  
Polyethylene Glycol ◽  
Electron Micrograph ◽  
High Moisture Content ◽  
Scanning Electron Micrograph ◽  
High Moisture ◽  
Water Contact ◽  
Practicable Method ◽  
Scanning Electron

Round bamboo has drawn more and more attention in architecture, decoration and recreational products. Splitting brings some safety problems, which shorten the service life of round bamboo. In this paper, three schemes were adopted as follows to solve the problem: round bamboo was impregnated in polyethylene glycol (PEG)-1000 solution alone, heat treatment in paraffin alone or treated with the combination of PEG impregnation and paraffin heat treatment (PEG–PH). The treated bamboo was exposed outdoors for 26 weeks to evaluate the development of cracks. Results showed as follows: the initial split of PEG–PH-treated bamboo appeared after 22 weeks, while that of the controls after 2 weeks, the total length of cracks was 2271.31 and 873.5 mm for the control and PEG–PH-treated bamboo, respectively. To reveal the reasons for reduced cracks, scanning electron micrograph (SEM) was employed to observe the microstructure of bamboo; besides, hydrophobicity of bamboo was characterized by the water contact angle. PEG can swell the cell wall and the better hydrophobicity of round bamboo could be achieved after PEG–PH treatment. Therefore, the combination of PEG immersion and paraffin heating is an effective and practicable method in bamboo treatment, especially for round bamboo with high moisture content.

Long-Term Stable Metal Organic Framework (MOF) Based Mixed Matrix Membranes for Ultrafiltration

2020 ◽  
Author(s):  
Muayad Al-shaeli ◽  
Stefan J. D. Smith ◽  
Shanxue Jiang ◽  
Huanting Wang ◽  
Kaisong Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Water Contact Angle ◽  
Mixed Matrix Membranes ◽  
Recovery Ratio ◽  
Mixed Matrix ◽  
Water Contact ◽  
Membrane Performance ◽  
Metal Organic ◽  
Matrix Membranes

<p>In this study, novel <a>mixed matrix polyethersulfone (PES) membranes</a> were synthesized by using two different kinds of metal organic frameworks (MOFs), namely UiO-66 and UiO-66-NH<sub>2</sub>. The composite membranes were characterised by SEM, EDX, FTIR, PXRD, water contact angle, porosity, pore size, etc. Membrane performance was investigated by water permeation flux, flux recovery ratio, fouling resistance and anti-fouling performance. The stability test was also conducted for the prepared mixed matrix membranes. A higher reduction in the water contact angle was observed after adding both MOFs to the PES and sulfonated PES membranes compared to pristine PES membranes. An enhancement in membrane performance was observed by embedding the MOF into PES membrane matrix, which may be attributed to the super-hydrophilic porous structure of UiO-66-NH<sub>2</sub> nanoparticles and hydrophilic structure of UiO-66 nanoparticles that could accelerate the exchange rate between solvent and non-solvent during the phase inversion process. By adding the MOFs into PES matrix, the flux recovery ratio was increased greatly (more than 99% for most mixed matrix membranes). The mixed matrix membranes showed higher resistance to protein adsorption compared to pristine PES membranes. After immersing the membranes in water for 3 months, 6 months and 12 months, both MOFs were stable and retained their structure. This study indicates that UiO-66 and UiO-66-NH<sub>2</sub> are great candidates for designing long-term stable mixed matrix membranes with higher anti-fouling performance.</p>

scholarly journals Surface modification of PMMA polymer and its composites with PC61BM fullerene derivative using an atmospheric pressure microwave argon plasma sheet

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrzej Sikora ◽  
Dariusz Czylkowski ◽  
Bartosz Hrycak ◽  
Magdalena Moczała-Dusanowska ◽  
Marcin Łapiński ◽  
...  
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Chemical Composition ◽  
Water Contact Angle ◽  
Plasma Sheet ◽  
Atmospheric Pressure ◽  
Argon Plasma ◽  
Fullerene Derivative ◽  
Water Contact ◽  
Pmma Polymer

AbstractThis paper presents the results of experimental investigations of the plasma surface modification of a poly(methyl methacrylate) (PMMA) polymer and PMMA composites with a [6,6]-phenyl-C61-butyric acid methyl ester fullerene derivative (PC61BM). An atmospheric pressure microwave (2.45 GHz) argon plasma sheet was used. The experimental parameters were: an argon (Ar) flow rate (up to 20 NL/min), microwave power (up to 530 W), number of plasma scans (up to 3) and, the kind of treated material. In order to assess the plasma effect, the possible changes in the wettability, roughness, chemical composition, and mechanical properties of the plasma-treated samples’ surfaces were evaluated by water contact angle goniometry (WCA), atomic force microscopy (AFM), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). The best result concerning the water contact angle reduction was from 83° to 29.7° for the PMMA material. The ageing studies of the PMMA plasma-modified surface showed long term (100 h) improved wettability. As a result of plasma treating, changes in the samples surface roughness parameters were observed, however their dependence on the number of plasma scans is irregular. The ATR-FTIR spectra of the PMMA plasma-treated surfaces showed only slight changes in comparison with the spectra of an untreated sample. The more significant differences were demonstrated by XPS measurements indicating the surface chemical composition changes after plasma treatment and revealing the oxygen to carbon ratio increase from 0.1 to 0.4.

scholarly journals Self-Cleaning Polyester Fabric Prepared with TiOF2 and Hexadecyltrimethoxysilane

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 387
Author(s):  
Euigyung Jeong ◽  
Heeju Woo ◽  
Yejin Moon ◽  
Dong Yun Lee ◽  
Minjung Jung ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Contact Angle ◽  
Treatment Method ◽  
Polyester Fabric ◽  
Anatase Tio2 ◽  
The Self ◽  
Water Contact ◽  
Direct Fluorination ◽  
Tomato Ketchup ◽  
Self Cleaning

In this study, self-cleaning polyester (PET) fabrics were prepared using TiOF2 and hexadecyltrimethoxysilane(HDS) treatment. TiOF2 was synthesized via direct fluorination of a precursor TiO2 at various reaction temperatures. The prepared PET fabrics had superior photocatalytic self-cleaning properties compared with anatase TiO2/HDS-treated PET fabrics under UV and sunlight with 98% decomposition of methylene blue. TiOF2/HDS-treated PET fabrics also had superior superhydrophobic self-cleaning properties compared with anatase TiO2/HDS-treated PET fabrics with a 161° water contact angle and 6° roll-off angle. After the self-cleaning tests of the non-dyed TiOF2/HDS-treated PET fabrics, we prepared dyed TiOF2/HDS-treated PET fabrics to test practical aspects of the treatment method. These PET fabrics were barely stained by tomato ketchup; even when stained, they could be self-cleaned within 4 h. These results suggest that practical self-cleaning PET fabrics with superhydrophobicity and photocatalytic degradation could be prepared using TiOF2/HDS-treatment.

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