scholarly journals Cross-linking of poly(dimethylaminoethyl methacrylate) by phytic acid: pH-responsive adsorbent for high-efficiency removal of cationic and anionic dyes

RSC Advances ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 4232-4242 ◽  
Author(s):  
Wenbo Liu ◽  
Rui Hu ◽  
Yanke Li ◽  
Yangze Huang ◽  
Yixi Wang ◽  
...  
Keyword(s):  
Phytic Acid ◽  
High Efficiency ◽  
Ph Sensitive ◽  
Cationic Dyes ◽  
Cross Linking ◽  
Ph Responsive ◽  
High Adsorption ◽  
Anionic Dyes ◽  
Dimethylaminoethyl Methacrylate ◽  
Adsorption Capacities

The adsorbent PADG based on phytic acid and DMAEMA was synthesized and tested, which is pH-sensitive and shows high adsorption capacities for anionic and cationic dyes.

Adsorption of Dyes onto Sodium Alginate Graft Poly(Acrylic Acid-co-2-Acrylamide-2-Methyl Propane Sulfonic Acid)/ Kaolin Hydrogel Composite

2017 ◽  
Vol 25 (8) ◽  
pp. 627-634 ◽  
Author(s):  
Linhui Zhu ◽  
Chengdong Guan ◽  
Bin Zhou ◽  
Zhentao Zhang ◽  
Rui Yang ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Xylenol Orange ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Anionic Dyes ◽  
Hydrogel Composite ◽  
Adsorption Capacities ◽  
Initial Ph ◽  
Poly Acrylic Acid

Adsorption of four dyes, namely methyl violet (MV), rhodamine 6G (R6G), acid chrome blue K (AK) and xylenol orange (XO) onto sodium alginate graft poly(acrylic acid-co-2-acrylamide-2-methyl-1-propanesulfonicacid)/kaolin (SA-g-P(AA-co-AMPS)/KL) hydrogel composite is studied. The factors influencing the adsorption capacities, including the initial concentrations of dye solutions, contact time, initial pH values and dosage of the adsorbent as well as ionic strength of the solution are discussed. It is more effective for the composite to adsorb cationic dyes such as MV and R6G rather than anionic dyes AK and XO. The maximum adsorption capacities of MV, R6G, AK and XO are 1361.1, 1627.8, 563.5 and 312.4 mg/g, respectively. The adsorption thermodynamics for the four dyes are in accordance with both the Freudlich and Redlich-Peterson equations. It is shown that adsorption of the cationic dyes R6G and MV is spontaneous, while that of anionic dyes AK and XO is not. The kinetics studies show that the adsorption of the four dyes fitted a pseudo-second-order equation.

pH sensitive amphiphilic conetworks based on end-group cross-linking of polydimethylsiloxane pentablock copolymer and polymethylhydrosiloxane

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 17851-17861 ◽  
Author(s):  
Ming Qiu ◽  
Xin-Zheng Zhao ◽  
Da-Peng Liu ◽  
Chun-Ju He
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Ph Sensitive ◽  
Cross Linking ◽  
Atom Transfer ◽  
Ph Responsive ◽  
Pentablock Copolymers ◽  
Pentablock Copolymer ◽  
End Group

A series of pH-responsive amphiphilic conetworks were synthesized through cross-linking of well-defined amphiphilic pentablock copolymers via atom transfer radical polymerization.

pH-Responsive reversibly cross-linked micelles by phenol–yne click via curcumin as a drug delivery system in cancer chemotherapy

2019 ◽  
Vol 7 (24) ◽  
pp. 3884-3893 ◽  
Author(s):  
Yuancheng Liu ◽  
Fan Chen ◽  
Kui Zhang ◽  
Quan Wang ◽  
Yuanwei Chen ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Delivery System ◽  
Cancer Chemotherapy ◽  
Drug Loading ◽  
Ph Sensitive ◽  
Cross Linking ◽  
Ph Responsive ◽  
System P

pH-sensitive reversibly cross-linked micelles by phenol–yne click via curcumin (Cur) using mPEG-b-PHEMA-5HA are developed by combining drug loading and cross-linking as a drug delivery system.

scholarly journals Stabilization and Release of Palm Tocotrienol Emulsion Fabricated Using pH-Sensitive Calcium Carbonate

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 358
Author(s):  
Phui Yee Tan ◽  
Beng Ti Tey ◽  
Eng Seng Chan ◽  
Oi Ming Lai ◽  
Hon Weng Chang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Droplet Size ◽  
Entrapment Efficiency ◽  
Ph Sensitive ◽  
Emulsion System ◽  
Ph Responsive ◽  
Small Droplet ◽  
Homogenization Time ◽  
Oil In Water ◽  
Ph Range

Calcium carbonate (CaCO3) has been utilized as a pH-responsive component in various products. In this present work, palm tocotrienols-rich fraction (TRF) was successfully entrapped in a self-assembled oil-in-water (O/W) emulsion system by using CaCO3 as the stabilizer. The emulsion droplet size, viscosity and tocotrienols entrapment efficiency (EE) were strongly affected by varying the processing (homogenization speed and time) and formulation (CaCO3 and TRF concentrations) parameters. Our findings indicated that the combination of 5000 rpm homogenization speed, 15 min homogenization time, 0.75% CaCO3 concentration and 2% TRF concentration resulted in a high EE of tocotrienols (92.59–99.16%) and small droplet size (18.83 ± 1.36 µm). The resulting emulsion system readily released the entrapped tocotrienols across the pH range tested (pH 1–9); with relatively the highest release observed at pH 3. The current study presents a potential pH-sensitive emulsion system for the entrapment and delivery of palm tocotrienols.

scholarly journals Polyaniline and sodium alginate nanocomposite: a pH-responsive adsorbent for the removal of organic dyes from water

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43904-43914
Author(s):  
Deola Majhi ◽  
Braja N. Patra
Keyword(s):  
Sodium Alginate ◽  
Organic Dyes ◽  
Selective Removal ◽  
Ph Responsive ◽  
Anionic Dyes

Polyaniline and sodium alginate nanocomposite was synthesized and it was used for selective removal of both cationic and anionic dyes from water at different pH.

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