Swelling behavior of pH-sensitive copolymers based on styrene and 4-(or 2-)vinylpyridine

1993 ◽  
Vol 26 (17) ◽  
pp. 4675-4680 ◽  
Author(s):  
Christopher D. Batich ◽  
Jun Yan ◽  
Charles Bucaria ◽  
Maher Elsabee
Keyword(s):  
Ph Sensitive ◽  
Swelling Behavior

pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89083-89091 ◽  
Author(s):  
Huijuan Zhang ◽  
Xianjuan Pang ◽  
Yuan Qi
Keyword(s):  
Graphene Oxide ◽  
Mechanical Strength ◽  
Sodium Alginate ◽  
Ph Sensitive ◽  
Swelling Behavior ◽  
Ph Dependent

A pH-sensitive and mechanically strong graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel was designed and prepared. The composite semi-IPN hydrogel showed superior mechanical strength and pH-dependent swelling behavior.

Preparation and pH-sensitive swelling behavior of physically crosslinked polyampholyte gels

2006 ◽  
Vol 102 (4) ◽  
pp. 3857-3861 ◽  
Author(s):  
Yanbing Zhao ◽  
Yajiang Yang ◽  
Xiangliang Yang ◽  
Huibi Xu
Keyword(s):  
Ph Sensitive ◽  
Swelling Behavior ◽  
Physically Crosslinked ◽  
Polyampholyte Gels

scholarly journals Rheological and Swelling Behavior of pH Sensitive Hydrogel Particles

2014 ◽  
Vol 9 ◽  
pp. 192-196 ◽  
Author(s):  
Lomas K. Tomar ◽  
Charu Tyagi ◽  
Yahya E. Choonara ◽  
Pradeep Kumar ◽  
Viness Pillay
Keyword(s):  
Ph Sensitive ◽  
Swelling Behavior ◽  
Hydrogel Particles ◽  
Ph Sensitive Hydrogel

Effect of temperature and pH on swelling behavior of hydroxyethyl cellullose-acrylamide hydrogel

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Gabriel J. Alonso ◽  
José Luis A. Rivera ◽  
Ana María M. Mendoza ◽  
Maria Leonor H. Mendez
Keyword(s):  
Infrared Spectroscopy ◽  
Crosslinking Agent ◽  
Ph Sensitive ◽  
Swelling Behavior ◽  
Hydroxyethyl Cellulose ◽  
Effect Of Temperature ◽  
Swelling Capacity ◽  
Different Levels

AbstractThe swelling behavior of hydroxyethyl cellulose-acrylamide hydrogels at different pH and temperatures was studied. The absorption increased for the first 12 hours and then decreased. Several hydroxyethyl cellulose-acrylamide ratios were studied. Increasing hydroxyethyl cellulose amount decreased swelling, indicating that swelling was affected by increase in crosslinking. Three different levels of crosslinking agent were studied. Hydrogels exhibited a thermal and pH sensitive behaviour. Highest swelling capacity was found at pH 7.0 and 30 °C. All samples were characterized by means of infrared spectroscopy (FTIR). Characteristic absorbance peaks for both materials were found, showing the presence of hydroxyethyl cellulose and acrylamide on hydrogel.

scholarly journals Microstructured Macromaterials Based on IPN Microgels

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1078 ◽  
Author(s):  
Irina Rashitovna Nasimova ◽  
Vladimir Yurievich Rudyak ◽  
Anton Pavlovich Doroganov ◽  
Elena Petrovna Kharitonova ◽  
Elena Yurievna Kozhunova
Keyword(s):  
Computer Simulations ◽  
Polyacrylic Acid ◽  
Ph Sensitive ◽  
Conformational State ◽  
Swelling Behavior ◽  
Environmental Sensitivity ◽  
Interpenetrating Networks ◽  
Material Development ◽  
Microgel Particles

This study investigates the formation of microstructured macromaterials from thermo- and pH-sensitive microgels based on interpenetrating networks of poly-N-isopropylacrylamide (PNIPAM) and polyacrylic acid (PAA). Macromaterials are produced as a result of the deposition of microgel particles and subsequent crosslinking of polyacrylic acid subnetworks to each other due to the formation of the anhydride bonds during annealing. Since both PNIPAM and PAA are environment-sensitive polymers, one can expect that their conformational state during material development will affect its resulting properties. Thus, the influence of conditions of preparation for annealing (pH of the solution, the temperature of preliminary drying) on the swelling behavior, pH- and thermosensitivity, and macromaterial inner structure was investigated. In parallel, the study of the effect of the relative conformations of the IPN microgel subnetworks on the formation of macromaterials was carried out by the computer simulations method. It was shown that the properties of the prepared macromaterials strongly depend both on the temperature and pH of the PNIPAM-PAA IPN microgel dispersions. This opens up new opportunities to obtain materials with pre-chosen characteristics and environmental sensitivity.

Novel pH-sensitive chitosan hydrogels: swelling behavior and states of water

Polymer ◽  
2000 ◽  
Vol 41 (12) ◽  
pp. 4589-4598 ◽  
Author(s):  
X Qu ◽  
A Wirsén ◽  
A.-C Albertsson
Keyword(s):  
Ph Sensitive ◽  
Swelling Behavior ◽  
Chitosan Hydrogels
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