PREPARATION OF DIFFERENT MOLECULAR WEIGHT CHITOSANS BY CONTROLLING MULTISTAGE DEACETYLATION CONDITIONS AND ITS EFFECT ON POROSITY OF PREPARED SCAFFOLDS

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YAGHOBI N.; MIRZADEH H.; VAKILI H.

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Journal: Journal of Applied Research in Chemistry Year:2013 | Volume:7 | Issue:2 Page(s): 41-50

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Title

PREPARATION OF DIFFERENT MOLECULAR WEIGHT CHITOSANS BY CONTROLLING MULTISTAGE DEACETYLATION CONDITIONS AND ITS EFFECT ON POROSITY OF PREPARED SCAFFOLDS

Author(s)

YAGHOBI N. | MIRZADEH H. | VAKILI H. | Issue Writer Certificate

Keywords

BIOPOLYMERQ2

CHITOSANQ1

MOLECULAR WEIGHTQ1

DEGREE OF DEACETYLATIONQ2

INTRINSIC VISCOSITYQ2

Abstract

Chitosan samples with different MOLECULAR WEIGHTs (Mw) and DEGREE OF DEACETYLATION (DD) were prepared by controlling operating conditions through multistage alkali treatment. The temperature of reaction, time duration, and number of reaction steps were considered as effective parameters. A database was developed for CHITOSAN preparation in order to achieve high degrees of deacetylation and control over the MOLECULAR WEIGHT of CHITOSAN without changing other molecular structures. The number of treatments and the duration of each step of deacetylation significantly affected MOLECULAR WEIGHT so that two samples were obtained with the DD of 99% and two different MOLECULAR WEIGHTs ranging from 4.66×105 to 2.93×105. Based on the results, the highest MOLECULAR WEIGHT obtained using the multistage treatment without decreasing DD was 5.32×105 with the DD of 96.67%. Also, the morphological studies indicate that MOLECULAR WEIGHT of CHITOSAN has significant effect on pore size of the prepared scaffolds, although its quantity is critical.

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APA: Copy

YAGHOBI, N., MIRZADEH, H., & VAKILI, H.. (2013). PREPARATION OF DIFFERENT MOLECULAR WEIGHT CHITOSANS BY CONTROLLING MULTISTAGE DEACETYLATION CONDITIONS AND ITS EFFECT ON POROSITY OF PREPARED SCAFFOLDS. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), 7(2), 41-50. SID. https://sid.ir/paper/180041/en

Vancouver: Copy

YAGHOBI N., MIRZADEH H., VAKILI H.. PREPARATION OF DIFFERENT MOLECULAR WEIGHT CHITOSANS BY CONTROLLING MULTISTAGE DEACETYLATION CONDITIONS AND ITS EFFECT ON POROSITY OF PREPARED SCAFFOLDS. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)[Internet]. 2013;7(2):41-50. Available from: https://sid.ir/paper/180041/en

IEEE: Copy

N. YAGHOBI, H. MIRZADEH, and H. VAKILI, “PREPARATION OF DIFFERENT MOLECULAR WEIGHT CHITOSANS BY CONTROLLING MULTISTAGE DEACETYLATION CONDITIONS AND ITS EFFECT ON POROSITY OF PREPARED SCAFFOLDS,” JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), vol. 7, no. 2, pp. 41–50, 2013, [Online]. Available: https://sid.ir/paper/180041/en

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