scholarly journals Effect of bacterial cellulose nanofibers incorporation on acid-induced casein gels: microstructures and rheological properties

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Kai Yuan ◽  
Xiaofei Li ◽  
Xudong Yang ◽  
Shuai Luo ◽  
Xi Yang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Rheological Properties ◽  
Bacterial Cellulose ◽  
Structural Properties ◽  
Gluconic Acid ◽  
Cellulose Nanofibers ◽  
Gel Strength ◽  
Structural Homogeneity ◽  
Mechanical And Structural Properties ◽  
Addition Amount

Abstract In this study, the effect of bacterial cellulose nanofibers (BCNF) incorporation on the structural and rheological properties of casein gels was investigated, where the mixed BCNF and casein gels were prepared by adding gluconic acid δ-lactone (GDL) to acidify the mixed polymer solutions at 3.0% casein concentration (w/v) and varying BCNF concentrations (0–0.5%, w/v). By changing the addition amount of GDL, the mechanical and structural properties of the mixed gels were studied at above, near and below the electric point (pI) of the casein. At pH above the pI of the casein, the introduction of BCNF initially increased the gel strength, but further addition of BCNF weakened the mixed gels. At near and below the pI of the casein, the incorporation of BCNF continuously increased the gel strength. Besides, all gels showed good structural homogeneity, without macroscopic phase separation occurring, which indicated good compatibility of BCNF with the casein gels.

The influence of alkaline treatment on the mechanical and structural properties of bacterial cellulose

2021 ◽  
pp. 118431
Author(s):  
Si-Qian Chen ◽  
Oliver W. Meldrum ◽  
Qiudong Liao ◽  
Zhaofeng Li ◽  
Xiao Cao ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Structural Properties ◽  
Alkaline Treatment ◽  
Mechanical And Structural Properties

Mechanical and structural properties of native and alkali-treated bacterial cellulose produced by Gluconacetobacter xylinus strain ATCC 53524

Cellulose ◽  
2009 ◽  
Vol 16 (6) ◽  
pp. 1047-1055 ◽  
Author(s):  
Brigid A. McKenna ◽  
Deirdre Mikkelsen ◽  
J. Bernhard Wehr ◽  
Michael J. Gidley ◽  
Neal W. Menzies
Keyword(s):  
Bacterial Cellulose ◽  
Structural Properties ◽  
Gluconacetobacter Xylinus ◽  
Strain Atcc ◽  
Mechanical And Structural Properties

Mechanical and structural properties of Permalloy films on glass and/or Si(111) substrates

2008 ◽  
Vol 94 (2) ◽  
pp. 431-436 ◽  
Author(s):  
S. U. Jen ◽  
Y. T. Chen ◽  
N. T. Yang ◽  
W. C. Cheng
Keyword(s):  
Structural Properties ◽  
Mechanical And Structural Properties

scholarly journals Influence of biological origin on the tensile properties of cellulose nanopapers

Cellulose ◽  
2021 ◽  
Author(s):  
Katri S. Kontturi ◽  
Koon-Yang Lee ◽  
Mitchell P. Jones ◽  
William W. Sampson ◽  
Alexander Bismarck ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cell Wall ◽  
Bacterial Cellulose ◽  
Raw Materials ◽  
Cellulose Nanofibers ◽  
Nanofibrillated Cellulose ◽  
Primary Cell Wall ◽  
Biological Origin ◽  
Basic Principles ◽  
Fiber Mats

Abstract Cellulose nanopapers provide diverse, strong and lightweight templates prepared entirely from sustainable raw materials, cellulose nanofibers (CNFs). Yet the strength of CNFs has not been fully capitalized in the resulting nanopapers and the relative influence of CNF strength, their bonding, and biological origin to nanopaper strength are unknown. Here, we show that basic principles from paper physics can be applied to CNF nanopapers to illuminate those relationships. Importantly, it appeared that ~ 200 MPa was the theoretical maximum for nanopapers with random fibril orientation. Furthermore, we demonstrate the contrast in tensile strength for nanopapers prepared from bacterial cellulose (BC) and wood-based nanofibrillated cellulose (NFC). Endemic amorphous polysaccharides (hemicelluloses) in NFC act as matrix in NFC nanopapers, strengthening the bonding between CNFs just like it improves the bonding between CNFs in the primary cell wall of plants. The conclusions apply to all composites containing non-woven fiber mats as reinforcement. Graphic abstract

Cellulose nanofibers from banana rachis added to a Curcuma longa L. rhizome suspension: Color, stability and rheological properties

2021 ◽  
Vol 27 ◽  
pp. 100180
Author(s):  
A.M. Serpa Guerra ◽  
C. Gómez Hoyos ◽  
J.A. Velásquez-Cock ◽  
P. Gañán Rojo ◽  
A. Eceiza ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Curcuma Longa ◽  
Cellulose Nanofibers ◽  
Color Stability

Conformational and rheological properties of bacterial cellulose sulfate

2021 ◽  
Author(s):  
Shen Song ◽  
Xiaoyuan Liu ◽  
Ling Ding ◽  
Ji Zhang ◽  
Yulong Huang ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Bacterial Cellulose ◽  
Cellulose Sulfate

Stereo-chemical contributions to the glass transition and liquid–liquid phase separation in high molecular weight poly(N-vinyl carbazole)

RSC Advances ◽  
2016 ◽  
Vol 6 (35) ◽  
pp. 29326-29333 ◽  
Author(s):  
Abdul G. Al Lafi ◽  
James N. Hay
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Phase Separation ◽  
Liquid Phase ◽  
High Molecular Weight ◽  
Structural Properties ◽  
Thermal History ◽  
Liquid Phase Separation ◽  
High Molecular Weight Poly ◽  
Liquid Liquid Phase Separation

Thermal history and purification effects on the structural properties of PVK were investigated. Liquid–liquid phase separation is suggested to occur by separation of isotactic rich segments from a matrix which is predominantly atactic.

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