Thermal properties, crystallization and antimicrobial activity of chitosan biguanidine grafted poly(3-hydroxybutyrate) containing silver nanoparticles.
作者： Hend Ezzat Salama , Mohamed Samir Abdel Aziz , Gamal Riad Saad
DOI: 10.1016/J.IJBIOMAC.2017.12.153
关键词: Silver nanoparticle 、 Nanocomposite 、 Chemical engineering 、 Differential scanning calorimetry 、 Copolymer 、 Chitosan 、 Avrami equation 、 Materials science 、 Crystallization 、 Thermal stability
摘要: Abstract Green synthesis of novel nanocomposites series based on chitosan biguanidine grafted poly(3-hydroxybutyrate) copolymer (ChG-g-PHB) and silver nanoparticles (AgNPs) was successfully done via in situ reduction AgNO3 the matrix. Transmission electron microscopy verified homogeneous dispersion spherical shape AgNPs with an average particle size 12.3 to 19.2 nm. X-ray diffraction pattern revealed face centered cubic structure AgNPs. The thermal stability improved upon increasing content up 2.0%, then declined loading 3.0%. Coats-Redfern model showed that sample 2.0% has highest activation energy degradation values 264 270 kJ mol− 1 for 1st 2nd steps, respectively. Differential scanning calorimetry indicated acts as a nucleating agent nonisothermal melt crystallization PHB component. Avrami equation described well segments, exponent 3.10 3.36 ChG-g-PHB its nanocomposite, Regardless AgNPs, antimicrobial activity is better than neat copolymer. loaded 3.0% best MIC value range 0.98–1.95 μg mL− 1.
sci-hub.se 参考文章(70)
L. A. Hadwiger, D. F. Kendra, B. W. Fristensky, W. Wagoner, Chitosan Both Activates Genes in Plants and Inhibits RNA Synthesis in Fungi Springer, Boston, MA. pp. 209- 214 ,(1986) , 10.1007/978-1-4613-2167-5_28
J. Cobntbekt, R.H. Mabchessault, Physical properties of poly-β-hydroxybutyrate Journal of Molecular Biology. ,vol. 71, pp. 735- 756 ,(1972) , 10.1016/S0022-2836(72)80035-4
Hala F. Naguib, Mohamed S. Abdel Aziz, Sherif M. Sherif, Gamal R. Saad, Synthesis and thermal characterization of poly(ester-ether urethane)s based on PHB and PCL-PEG-PCL blocks Journal of Polymer Research. ,vol. 18, pp. 1217- 1227 ,(2011) , 10.1007/S10965-010-9525-Y
Troy M. Benn, Paul Westerhoff, Nanoparticle Silver Released into Water from Commercially Available Sock Fabrics Environmental Science & Technology. ,vol. 42, pp. 4133- 4139 ,(2008) , 10.1021/ES7032718
Cai Zhijiang, Yang Guang, Jaehwan Kim, Biocompatible nanocomposites prepared by impregnating bacterial cellulose nanofibrils into poly(3-hydroxybutyrate) Current Applied Physics. ,vol. 11, pp. 247- 249 ,(2011) , 10.1016/J.CAP.2010.07.016
R. H. Marchessault, Suzanne Coulombe, Hiromichi Morikawa, Keizo Okamura, J. F. Revol, Solid state properties of poly-β-hydroxybutyrate and of its oligomers Canadian Journal of Chemistry. ,vol. 59, pp. 38- 44 ,(1981) , 10.1139/V81-007
Cheng Chen, Xuesong Zhou, Yugang Zhuang, Lisong Dong, Thermal behavior and intermolecular interactions in blends of poly(3‐hydroxybutyrate) and maleated poly(3‐hydroxybutyrate) with chitosan Journal of Polymer Science Part B. ,vol. 43, pp. 35- 47 ,(2005) , 10.1002/POLB.10742
Kannan Badri Narayanan, Natarajan Sakthivel, Biological synthesis of metal nanoparticles by microbes. Advances in Colloid and Interface Science. ,vol. 156, pp. 1- 13 ,(2010) , 10.1016/J.CIS.2010.02.001
Angshuman Pal, Sunil Shah, Surekha Devi, Microwave-assisted synthesis of silver nanoparticles using ethanol as a reducing agent Materials Chemistry and Physics. ,vol. 114, pp. 530- 532 ,(2009) , 10.1016/J.MATCHEMPHYS.2008.11.056
Entsar I. Rabea, Mohamed E.-T. Badawy, Christian V. Stevens, Guy Smagghe, Walter Steurbaut, Chitosan as Antimicrobial Agent: Applications and Mode of Action Biomacromolecules. ,vol. 4, pp. 1457- 1465 ,(2003) , 10.1021/BM034130M