Preparation and swelling properties of pH-sensitive composite hydrogel beads based on chitosan-g-poly (acrylic acid)/vermiculite and sodium alginate for diclofenac controlled release

2010 ◽  
Vol 46 (3) ◽  
pp. 356-362 ◽  
Author(s):  
Qin Wang ◽  
Xiaoling Xie ◽  
Xiaowei Zhang ◽  
Junping Zhang ◽  
Aiqin Wang
Keyword(s):  
Controlled Release ◽  
Acrylic Acid ◽  
Sodium Alginate ◽  
Ph Sensitive ◽  
Composite Hydrogel ◽  
Swelling Properties ◽  
Hydrogel Beads ◽  
Poly Acrylic Acid

Preparation and characterization of a novel pH-sensitive Salecan-g-poly(acrylic acid) hydrogel for controlled release of doxorubicin

2015 ◽  
Vol 3 (13) ◽  
pp. 2685-2697 ◽  
Author(s):  
Xinyu Hu ◽  
Wei Wei ◽  
Xiaoliang Qi ◽  
Hao Yu ◽  
Liandong Feng ◽  
...  
Keyword(s):  
Controlled Release ◽  
Acrylic Acid ◽  
Ph Sensitive ◽  
Swelling Behaviour ◽  
Poly Acrylic Acid

The pH-sensitive swelling behaviour and DOX release of Salecan-g-PAA hydrogels are discussed.

Preparation and swelling properties of poly(acrylic acid-co-acrylamide) composite hydrogels

e-Polymers ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. 95-106 ◽  
Author(s):  
Wei-Min Cheng ◽  
Xiang-Ming Hu ◽  
Yan-Yun Zhao ◽  
Ming-Yue Wu ◽  
Zun-Xiang Hu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Salt Tolerance ◽  
Acrylic Acid ◽  
Water Absorption ◽  
Crosslinking Agent ◽  
Salt Resistance ◽  
Composite Hydrogel ◽  
Swelling Properties ◽  
Unfavorable Effect ◽  
Poly Acrylic Acid

AbstractIn order to study the effect of composite clays on the mechanical properties, water absorption and salt tolerance of a hydrogel, a poly(acrylic acid-co-acrylamide)/bentonite/kaolin composite hydrogel was prepared. Acrylic acid and acrylamide have been used as water absorbent monomers. N,N′-methylene bisacrylamide was used as a crosslinking agent while potassium persulfate was used as an initiator. The water preserving capability, repeated water absorption, salt resistance and the mechanical properties of the composite hydrogel are analyzed and discussed. The results show that a small quantity of bentonite can increase the storage modulus of the composite hydrogel, whereas the excess clay had an unfavorable effect on the mechanical strength of the composite hydrogel. Both bentonite and kaolin significantly improved the water preserving capability, repeated water absorption and salt resistance of the composite hydrogel. Optimum values for the amounts of bentonite and kaolin were found to be 10% and 5%, respectively.

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