scholarly journals Grafting of Heparin on Blend Membrane of Citric Acid Crosslinked Chitosan/Polyethylene Glycol-Poly Vinyl Alcohol (PVA-PEG)

2019 ◽  
Vol 19 (1) ◽  
pp. 151
Author(s):  
Retno Ariadi Lusiana ◽  
Ginanjar Argo Pambudi ◽  
Fitra Nilla Sari ◽  
Didik Setiyo Widodo ◽  
Khabibi Khabibi ◽  
...  
Keyword(s):  
Citric Acid ◽  
Vinyl Alcohol ◽  
Membrane Properties ◽  
Poly Vinyl Alcohol ◽  
Test Results ◽  
Blend Membrane ◽  
Grafting Reaction ◽  
Physical Tests ◽  
Crosslinked Chitosan ◽  
Poly Ethylene

Heparin, an active sulfate group material, grafted onto blend membrane citric acid cross-linked chitosan/poly (vinyl alcohol)-poly(ethylene glycol) (PVA-PEG) to improve the membrane properties. The physical tests shown that grafting reaction of citric acid crosslinked chitosan increased the mechanical strength and membrane swelling. The permeability test results, it was found that the grafted chitosan membrane was improved permeability of both urea and creatinine as compared to chitosan pure and chitosan crosslinked membrane. The negative charge of the sulphonate group of heparin increased the number of the active side of the carrier in the membrane, which then correlated to the membrane’s permeability process.

scholarly journals Preparation of Citric Acid Crosslinked Chitosan/Poly(Vinyl Alcohol) Blend Membranes for Creatinine Transport

2018 ◽  
Vol 16 (2) ◽  
pp. 144 ◽  
Author(s):  
Retno Ariadi Lusiana ◽  
Dwi Siswanta ◽  
Mudasir Mudasir
Keyword(s):  
Citric Acid ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Crosslinking Reaction ◽  
Transport Capacity ◽  
Chitosan Membrane ◽  
Group Modification ◽  
Crosslinked Chitosan ◽  
Pass Through ◽  
Functional Group Modification

Preparation of membrane using crosslinking reaction between chitosan and citric acid showed that functional group modification increased the number of active carrier groups which lead to better transport capacity of the membrane. In addition, the substitution of the carboxyl group increased creatinine permeation of chitosan membrane. The transport capacity of citric acid crosslinked chitosan membrane for creatinine was found to be 6.3 mg/L. The presence of cyanocobalamin slightly hindered the transport of creatinine although compounds did not able to pass through citric acid crosslinked chitosan/poly(vinyl alcohol) blend membrane, as compounds no found in the acceptor phase.

Branched/Hyperbranched Copolyesters from Poly(vinyl alcohol) and Citric Acid as Delivery Agents and Tissue Regeneration Scaffolds

2021 ◽  
pp. 2100134
Author(s):  
Srijoni Sengupta ◽  
Abhishek Singh ◽  
Koushik Dutta ◽  
Ram Prasad Sahu ◽  
Satish Kumar ◽  
...  
Keyword(s):  
Citric Acid ◽  
Tissue Regeneration ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol

Effect of Cobalt Stearate and Vegetable Oil on Uv and Biodegradation of Linear Low-Density Poly(Ethylene)-Poly(Vinyl Alcohol) Blends

2011 ◽  
Vol 2 (4) ◽  
pp. 131-148 ◽  
Author(s):  
Francis Vidya ◽  
Subin S. Raghul ◽  
Sarita G Bhat ◽  
Eby Thomas Thachil
Keyword(s):  
Vegetable Oil ◽  
Vinyl Alcohol ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Low Density ◽  
Compression Moulding ◽  
Melt Mixing ◽  
Degradation Behaviour ◽  
Moulding Process ◽  
Poly Ethylene

The main objective of this study was to enhance the rate of UV and biodegradation of polyethylene by incorporating biodegradable materials and prooxidants. Prooxidants such as transition metal complexes are capable of initiating photooxidation and polymer chain cleavage, rendering the product more susceptible to biodegradation. In this work, the effect of (1) a metallic photoinitiator, cobalt stearate, and (2) different combinations of cobalt stearate and vegetable oil on the photooxidative degradation of linear low-density poly(ethylene)-poly(vinyl alcohol) (LLDPE/PVA) blend films has been investigated. For this, film-grade LLDPE was blended with different proportions of PVA. PVA is widely used in the industrial field, and recently it has attracted increasing attention as a water-soluble biodegradable polymer. Cobalt stearate and vegetable oil were added to the blends as prooxidants. The blends were prepared by melt mixing in a Thermo HAAKE Polylab system. Thin films containing these additives were prepared by a subsequent compression moulding process. The effect of UV exposure on LLDPE/PVA films in the presence as well as absence of these additives was investigated. Tensile properties, FTIR spectra, and scanning electron microscopy (SEM) were employed to investigate the degradation behaviour. It was found

Miscible blends of poly(ethylene oxide) with brush copolymers of poly(vinyl alcohol)-graft -poly(l -lactide)

2016 ◽  
Vol 54 (13) ◽  
pp. 1217-1226 ◽  
Author(s):  
Ainhoa Lejardi ◽  
Jose-Ramon Sarasua ◽  
Agustin Etxeberria ◽  
Emilio Meaurio
Keyword(s):  
Ethylene Oxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Miscible Blends ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
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