Temperature and pH responsiveness of poly-(DMAA-co-unsaturated carboxylic acid) hydrogels synthesized by UV-irradiation

Kakinoki, Sachiro; Kaetsu, Isao; Nakayama, Masashi; Sutani, Kouichi; Uchida, Kenzo; Yukutake, Kouji

doi:10.1016/s0969-806x(02)00401-2

Cited by 26 publications

(19 citation statements)

References 18 publications

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“…Temperature responsiveness is caused by the hydrophobic interaction based on the hydration and dehydration of the methyl group of side chain [71]. Figure 11 shows the hydrodynamic radius distribution of P4VBCB/ DMAA-3 (0.2 mg/mL) with increasing the temperature.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

“…Poly(N,N 0 -dimethylacrylamide) (PDMAA) has temperature responsiveness, which have attracted extensive attention as water-absorbing, soft, and stimulisensitive materials [70][71][72][73]. Therefore, it is expected that the copolymer with DMAA and N 0 -(4-vinylbenzyl)-1,4-diaminobutane dihydrochloride with CB [6] threaded (4VBCB) can be synthesized.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and multi-stimuli-responsive behavior of copolymer of N,N′-dimethylacrylamide and complex pseudorotaxane

Yang

et al. 2012

Polym. Bull.

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Novel water-soluble side-chain copolymer with the pseudorotaxane structure threaded by cucurbit[6]uril (CB[6]) was synthesized by N 0 -(4-vinylbenzyl)-1, 4-diaminobutane dihydrochloride with CB[6] threaded (4VBCB) and N,N 0 -dimethylacrylamide (DMAA) as monomers. SEM results show that the diameter of the spherical particles increases and the crosslinking in spherical particles occurred with the decrease of the molar ratio of DMAA/4VBCB. Interestingly, 1 H NMR spectra show that the threading and dethreading of CB[6] on the side chains could be controlled by the addition of CaCl 2 or BaCl 2 , but CB[6] cannot drop from the side chains by the addition of NaCl. DLS data indicate that the copolymers have thermal sensitivity and their jump temperature could be controlled by adjusting the molar ratio of DMAA/4VBCB, and RLS data show that the size of aggregation increases with increasing the concentration of NaCl. At the same time, the copolymers have pH-responsive behavior.

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and multi-stimuli-responsive behavior of copolymer of N,N′-dimethylacrylamide and complex pseudorotaxane

Yang

et al. 2012

Polym. Bull.

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“…We propose a novel method for imparting thermosensitivity to temperature-insensitive polymers, by which side-chain units of thermosensitive polymers are introduced to the target hyperbranched polymer core as temperature-sensitive moieties. Poly(dimethyoaminoethyl methacrylate), poly(DMAEMA), is a pH-responsive cationic polyelectrolyte containing tertiary amino groups, showing sensitivity to temperature [14]. The pendant tertiary amine groups of DMAEMA are easily protonated below its pK a , and the polymer undergoes a hydrophilic-to-hydrophobic transition when heated above its lower critical solution temperature (LCST) in water [15].…”

Section: Introductionmentioning

confidence: 99%

pH- and Thermo-Sensitive Co-polymers Based on a Hyperbranched Polymers Core as Encapsulation and Release Carriers for Guest Molecules

Jiang

Sun

Zhu

et al. 2011

Designed Monomers and Polymers

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Hyperbranched poly(3-ethyl-3-(hydroxymethyl)oxetane) (HPBO), modified by S-1-dodecyl-S -(α,α -dimethyl-α -acetic acid) trithiocarbonate (DMP) to form a RAFT macroinitiator, and then two monomers, 2-(dimethylamino)ethyl-methacrylate (DMAEMA) and acrylic acid (AA), were polymerized to obtain novel pH-and thermo-sensitive polymers with a hyperbranched polymer core. These polymers exhibited phase transitions in response to pH and temperature. They were possible to harvest a bioactive molecule, indometacin, from solution using the phase transition of these pH-and thermo-sensitive polymers. Various parameters, such as percent loading of drugs, pH, temperature and nature of the release media on the release profiles, were investigated. The resultant polymer carriers can potentially be used for the controlled release of the anti-inflammatory drug indometacin.

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“…The possible applications include metal extraction, wastewater treatment [12], soft contact lenses, controlled release of drugs, enzyme supports, wound dressing, water managing materials, diapers, agrochemical release and others. Recently, a surge in the synthesis and characterization of synthetic polyampholytes has been reported [13][14][15][16][17][18][19]. Polyampholytic hydrogels are defined as crosslinked macromolecular networks containing positively and negatively charged repeating units and show very unusual properties from those of the parent polyelectrolyte polymers, which contain the same charge.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and swelling characteristics of zwitterionic hydrogel

Singh

2008

E-Polymers

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Hydrogels comprising of zwitterionic repeat units were synthesized. The amine groups of the poly (ester amine) were quaternized with 1,3-propane sultone. The gelation was observed on treatment with sultone. The hydrophilic gel thus formed is sensitive to temperature, pH, ionic strength and nature of electrolytes in aqueous solution. In absence of any electrolyte, the extent of swelling decreased with temperature, but in the monovalent salt solution the equilibrium swelling diminished with temperature and the contrary behaviour was experiential in bivalent electrolytes.

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Temperature and pH responsiveness of poly-(DMAA-co-unsaturated carboxylic acid) hydrogels synthesized by UV-irradiation

Cited by 26 publications

References 18 publications

Synthesis and multi-stimuli-responsive behavior of copolymer of N,N′-dimethylacrylamide and complex pseudorotaxane

Synthesis and multi-stimuli-responsive behavior of copolymer of N,N′-dimethylacrylamide and complex pseudorotaxane

pH- and Thermo-Sensitive Co-polymers Based on a Hyperbranched Polymers Core as Encapsulation and Release Carriers for Guest Molecules

Synthesis and swelling characteristics of zwitterionic hydrogel

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