Formulation of zeolite supported nano-metallic catalyst and applications in textile effluent treatment

Renewable superhydrophobic materials have attracted great attention due to their extensive applications in the fields such as cost‐effective and biodegradable oil/water separation field. Herein, we reported an eco‐friendly and facile methodology to develop the superhydrophobic cellulosic paper by immersion method using the ethanol solution of stearic acid. Furthermore, the treated cellulosic papers showed super‐hydrophobicity with water contact angle (WCA) above 153°. Interestingly, this method can realize superhydrophobic‐hydrophilic conversion by simply adjusting the temperature and is amenable for different substrates and with the WCA of 114‐162°. More importantly, the utilization of fluorinated reagents has been avoided, thereby minimizing the production cost and improving safety and environmental aspects. Meanwhile, the modified natural cellulosic paper is applied for oil–water separation, and its separation efficiency was as high as 95% after 10 cycles, indicating the good reusability of stearic acid modified filter papers. Consequently, this simple strategy based on the stearic acid immersion method thus provided an easy conversion of superhydrophobic‐hydrophilic interface and provided facile strategies for conversion of commercial quantitative filter paper to functional materials for oil/water separation.

Section: Methodsmentioning

confidence: 99%

Fabrication of the superhydrophobic natural cellulosic paper with different wettability and oil/water separation application

Yun

Tong

Wang

et al. 2020

“…In recent years, novel composites [1][2][3] , polymers, 4 and catalysts 5 have been widely studied and applied in virous fields thanks to their superb properties. Among these materials, due to preferable properties like high strength and stiffness, excellent corrosion resistance, good biocompatibility and radiolucency, polyether-ether-ketone (PEEK) has been widely used in industrial and medical fields [6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of water‐mixing nitrogen atmospheric pressure plasma jet on polyether‐ether‐ketone and time stability under different conditions

Liu

Guan

Shen

et al. 2021

Possessing excellent properties including good biocompatibility, high strength, and stiffness, polyether-ether-ketone (PEEK) has significant application values in medical and industrial fields. However, the relatively poor wettability and low adhesion limit its further applications. Atmospheric pressure plasma jet (APPJ) has been utilized for adjusting PEEK properties, but better hydrophilization effect and time stability after treatment are still urgently needed. In this paper, we employ a water-mixing nitrogen (N 2 H 2 O) APPJ to process PEEK, and surface wettability can be effectively improved (contact angle~18 within 2 min, distance between sample and nozzle outlet: 10 mm) without inducing obvious microstructure damages. Additionally, after storing for 40 days, the sample treated by N 2 H 2 O APPJ also possessed better wettability (~54) compared with that treated by N 2 APPJ (~65). On the basis of this lowdamage and high-efficient modification method, we perform aging experiments under different conditions (different temperatures 25, −10 C; and low vacuum condition: 50 kPa) to determine a relatively optimum storing condition for this method. The experiment results indicate that low temperature and vacuum are conducive to retaining the plasma-induced wettability (~34). The treatment method and storing conditions for PEEK presented here may facilitate the application of PEEK in various fields.

“…8 The applications and properties of polymeric emulsifiers, as in other materials such as zeolites, and nanocomposites are strongly related to their structure. [9][10][11] One of the relevant application of polyglycerol-esters that has been investigated to produce emulsifiers with different properties varying fatty acids, esterification degree, and the length of fatty acids chain. For instance, Shikhaliev et al 12 studied emulsifying properties of polyglycerol-esters obtained from pentaglycerol and various fatty acids varying esterification degrees.…”

Section: Introductionmentioning

confidence: 99%

“…Emulsifiers are amphiphilic molecules that contain a hydrophilic ionic or non‐ionic head and a hydrophobic tail and can exist in monomeric or complex polymeric forms 8 . The applications and properties of polymeric emulsifiers, as in other materials such as zeolites, and nanocomposites are strongly related to their structure 9–11 …”

Section: Introductionmentioning

confidence: 99%

Glycerol polymerization degree effect on the emulsifying properties of polyglycerol esters

Díaz-Lasprilla

Mercado

Ramirez-Caballero

2021

Polymeric emulsifiers based on glycerol and oleic acid were developed and their properties evaluated in palm oil and water solutions. Developed polymeric emulsifiers were polyglycerol-esters. Polymerization degree of polyglycerol-esters at different dosages (from 0.2 to 3% w/v) had a significant effect over emulsion stability, water surface tension, droplet size, and viscosity. Polyglycerol-ester with highest polymerization degree behaved more efficiently as emulsifier. A dosage of 0.5% w/v was required to maintain emulsion stability for a half-life period of 872 min (~14.5 h); which, is 5.6 and 3.6-fold longer stability than with the other two polyglycerol-esters developed. When dosage increased to 3% w/v, the emulsion stability also increased to 3792 min (~2.6 days). Nevertheless, surfactants with lower polymerization degree and molecular weight did not behave the same way. Emulsifier with highest polymerization degree reduced water surface tension by 70% and the mean particle diameter decreased when emulsifier polymerization degree increased. For the viscosity parameter, there were two interesting regions: for shear rates up to 1 s −1 the emulsion behaved as Non-Newtonian fluid type Shear-thinning; while, higher shear rates, the viscosity exhibited a Newtonian profile.