Effect of bassorin (derived from gum tragacanth) and halloysite nanotubes on physicochemical properties and the osteoconductivity of methylcellulose-based injectable hydrogels

Polyamide 6 (PA6) suffers from fast degradation in humid conditions due to hydrolysis of amide bonds, which limits its durability. The addition of nanotubular fillers represents a viable strategy for overcoming this issue, although the additive/polymer interface at high filler content can become privileged site for moisture accumulation. As a cost-effective and versatile material, halloysite nanotubes (HNT) were investigated to prepare PA6 nanocomposites with very low loadings (1–45% w/w). The roles of the physicochemical properties of two differently sourced HNT, of filler functionalization with (3-aminopropyl)triethoxysilane and of dispersion techniques (in situ polymerization vs. melt blending) were investigated. The aspect ratio (5 vs. 15) and surface charge (−31 vs. −59 mV) of the two HNT proved crucial in determining their distribution within the polymer matrix. In situ polymerization of functionalized HNT leads to enclosed and well-penetrated filler within the polymer matrix. PA6 nanocomposites crystal growth and nucleation type were studied according to Avrami theory, as well as the formation of different crystalline structures (α and γ forms). After 1680 h of ageing, functionalized HNT reduced the diffusion of water into polymer, lowering water uptake after 600 h up to 90%, increasing the materials durability also regarding molecular weights and rheological behavior.

Download Full-text

Physicochemical Properties of Bell Pepper and Kinetics of Its Color Change Influenced by Aloe vera and Gum Tragacanth Coatings during Storage at Different Temperatures

Journal of Food Processing and Preservation ◽

10.1111/jfpp.12018 ◽

2012 ◽

Vol 38 (2) ◽

pp. 684-693 ◽

Cited By ~ 10

Author(s):

Mohebbat Mohebbi ◽

Nasim Hasanpour ◽

Elham Ansarifar ◽

Mohammad Reza Amiryousefi

Keyword(s):

Physicochemical Properties ◽

Color Change ◽

Aloe Vera ◽

Bell Pepper ◽

Gum Tragacanth ◽

Different Temperatures ◽

Kinetics Of

Download Full-text

Synthesis and Investigation of Physicochemical Properties and Mechanical Strength of Natural Aluminosilicate Nanotubes Based Supports for Hydroprocesses Catalysts

Chemistry and Technology of Fuels and Oils ◽

10.32935/0023-1169-2021-624-2-30-36 ◽

2021 ◽

Vol 624 (2) ◽

pp. 30-36

Author(s):

N. R. Demikhova ◽

◽

A. V. Poplavskiy ◽

M. V. Reshetina ◽

S. S. Boev ◽

...

Keyword(s):

Physicochemical Properties ◽

Mechanical Strength ◽

Halloysite Nanotubes ◽

Acidic Properties ◽

Textural Characteristics ◽

Natural Aluminosilicate

Supports based on aluminosilicate halloysite nanotubes and alumina of different contents for hydroprocessing catalysts were synthesized and their textural characteristics and acidic properties were investigated. It was shown that the mechanical strength of the support pellets based on aluminosilicate nanotubes and alumina are comparable or superior to those for industrial analogs.

Download Full-text

The Role of Oil Phase in the Stability and Physicochemical Properties of Oil‐in‐Water Emulsions in the Presence of Gum Tragacanth

Journal of the American Oil Chemists Society ◽

10.1002/aocs.12248 ◽

2019 ◽

Vol 96 (7) ◽

pp. 795-803 ◽

Cited By ~ 1

Author(s):

Khadije Abdolmaleki ◽

Mohammad Amin Mohammadifar ◽

Zhian Sheikhi ◽

Golshan Matinfar ◽

Kooshan Nayebzadeh

Keyword(s):

Physicochemical Properties ◽

Gum Tragacanth ◽

Oil In Water ◽

The Stability

Download Full-text

Injectable enzymatically crosslinked hydrogels based on a poly(l-glutamic acid) graft copolymer

Polymer Chemistry ◽

10.1039/c4py00420e ◽

2014 ◽

Vol 5 (17) ◽

pp. 5069-5076 ◽

Cited By ~ 39

Author(s):

Kaixuan Ren ◽

Chaoliang He ◽

Yilong Cheng ◽

Gao Li ◽

Xuesi Chen

Keyword(s):

Physicochemical Properties ◽

Glutamic Acid ◽

Graft Copolymer ◽

Injectable Hydrogels ◽

Good Biocompatibility

Enzyme-mediated injectable hydrogels based on a poly(l-glutamic acid) graft copolymer with tunable physicochemical properties, biodegradability and good biocompatibility were developed.

Download Full-text