TY - JOUR
T1 - Control of chitosan molecular weight with cyclotron ion beam irradiation
AU - Kim, Mi Sook
AU - Choi, Yoon Jeong
AU - Noh, Insup
PY - 2008/5
Y1 - 2008/5
N2 - Control of water-soluble chitosan molecular weight was performed by irradiation of cyclotron proton ion beams by changing treatment conditions such as beam irradiation time for upto 10 min, beam energies as well as beam distances between the sample surface and beam after pre-calculating the sample positions with Stopping and Range of Ions in Matter software. Irradiation of high energy cyclotron ion beam induced significant reduction of molecular weights of water-soluble chitosan as observed by changes in both relative viscosity and molecular weights measured by gel permeation chromatography. The molecular weights of the beam-treated chitosan were reduced to 55-20% compared to that of the untreated one, depending on the beam irradiation conditions such as treatment time and beam energy. Polydispersity index indicated that the reduced chitosan molecular weights were wider distributed compared to that of the untreated chitosan samples.
AB - Control of water-soluble chitosan molecular weight was performed by irradiation of cyclotron proton ion beams by changing treatment conditions such as beam irradiation time for upto 10 min, beam energies as well as beam distances between the sample surface and beam after pre-calculating the sample positions with Stopping and Range of Ions in Matter software. Irradiation of high energy cyclotron ion beam induced significant reduction of molecular weights of water-soluble chitosan as observed by changes in both relative viscosity and molecular weights measured by gel permeation chromatography. The molecular weights of the beam-treated chitosan were reduced to 55-20% compared to that of the untreated one, depending on the beam irradiation conditions such as treatment time and beam energy. Polydispersity index indicated that the reduced chitosan molecular weights were wider distributed compared to that of the untreated chitosan samples.
KW - A. Polymers
KW - B. Chemical synthesis
KW - D. Surface properties
UR - http://www.scopus.com/inward/record.url?scp=43449100056&partnerID=8YFLogxK
U2 - 10.1016/j.jpcs.2007.10.039
DO - 10.1016/j.jpcs.2007.10.039
M3 - Article
AN - SCOPUS:43449100056
SN - 0022-3697
VL - 69
SP - 1577
EP - 1580
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 5-6
ER -