Performance Enhancement of Poly(lactic acid) and Sugar Beet Pulp Composites by Improving Interfacial Adhesion and Penetration

2008 ◽  
Vol 47 (22) ◽  
pp. 8667-8675 ◽  
Author(s):  
Feng Chen ◽  
LinShu Liu ◽  
Peter H. Cooke ◽  
Kevin B. Hicks ◽  
Jinwen Zhang
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Interfacial Adhesion ◽  
Performance Enhancement ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Beet Pulp

scholarly journals Poly(Lactic Acid)–Poly(Butylene Succinate)–Sugar Beet Pulp Composites; Part I: Mechanics of Composites with Fine and Coarse Sugar Beet Pulp Particles

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2531
Author(s):  
Rodion Kopitzky
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Sugar Beet ◽  
Cell Structure ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Butylene Succinate ◽  
Fracture Patterns ◽  
Beet Pulp ◽  
The Impact

Sugar beet pulp (SBP) is a residue available in large quantities from the sugar industry, and can serve as a cost-effective bio-based and biodegradable filler for fully bio-based compounds based on bio-based polyesters. The heterogeneous cell structure of sugar beet suggests that the processing of SBP can affect the properties of the composite. An “Ultra-Rotor” type air turbulence mill was used to produce SBP particles of different sizes. These particles were processed in a twin-screw extruder with poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) and fillers to granules for possible marketable formulations. Different screw designs, compatibilizers and the use of glycerol as a thermoplasticization agent for SBP were also tested. The spherical, cubic, or ellipsoidal-like shaped particles of SBP are not suitable for usage as a fiber-like reinforcement. In addition, the fineness of ground SBP affects the mechanical properties because (i) a high proportion of polar surfaces leads to poor compatibility, and (ii) due to the inner structure of the particulate matter, the strength of the composite is limited to the cohesive strength of compressed sugar-cell compartments of the SBP. The compatibilization of the polymer–matrix–particle interface can be achieved by using compatibilizers of different types. Scanning electron microscopy (SEM) fracture patterns show that the compatibilization can lead to both well-bonded particles and cohesive fracture patterns in the matrix. Nevertheless, the mechanical properties are limited by the impact and elongation behavior. Therefore, the applications of SBP-based composites must be well considered.

Biodegradable Composites from Sugar Beet Pulp and Poly(lactic acid)

2005 ◽  
Vol 53 (23) ◽  
pp. 9017-9022 ◽  
Author(s):  
Liu ◽  
Marshall L. Fishman ◽  
Kevin B. Hicks ◽  
Cheng-Kung Liu
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Biodegradable Composites ◽  
Beet Pulp

Green Composites from Sugar Beet Pulp and Poly(lactic acid): Structural and Mechanical Characterization

2007 ◽  
Vol 1 (3) ◽  
pp. 323-330 ◽  
Author(s):  
L. S. Liu ◽  
V. L. Finkenstadt ◽  
C.-K. Liu ◽  
D. R. Coffin ◽  
J. L. Willett ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Mechanical Characterization ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Green Composites ◽  
Beet Pulp

Evaluation of Poly(lactic acid) and Sugar Beet Pulp Green Composites

2006 ◽  
Vol 15 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Victoria L. Finkenstadt ◽  
LinShu Liu ◽  
J. L. Willett
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Green Composites ◽  
Beet Pulp

scholarly journals Effects of chemical preservative and pressing of ensiled sugar-beet pulp on the quality of fermentation process

2011 ◽  
Vol 50 (No. 12) ◽  
pp. 553-560 ◽  
Author(s):  
P. Doležal ◽  
V. Pyrochta ◽  
J. Doležal
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Dry Matter ◽  
Fermentation Process ◽  
Ph Value ◽  
Sugar Beet Pulp ◽  
Dry Matter Content ◽  
Chemical Preservative ◽  
Beet Pulp

This study deals with effects of pressing of ensiled sugar-beet pulp and of application of a chemical preservative on the quality of fermentation process. The experimental silages had a better sensory evaluation than the control ones. In silages treated chemically with a mixture of acids, statistically significantly (P < 0.01) higher dry matter content, lowest pH value, the value of lactic acid and the lowest content of all acids in dry matter were found after 180 days of storage from the beginning of the experiment. The statistically significantly (P < 0.01) highest lactic acid content (43.39 ± 1.25 g/kg DM) was determined in the control pressed silage. The highest LA/VFA ratio (1.40 ± 0.18) was calculated for non-pressed experimental silage (D – 3 l/t of KEM). As compared with untreated control the highest percentage (P < 0.01) of lactic acid and of all fermentation acids was found out in silage D treated with 3 l/t of KEM (58.18 ± 0.47 g/kg DM). Undesirable butyric and propionic acids were not found in chemically treated silage samples (C, D, E, F). However, the highest (P < 0.01) contents of butyric acid (26.37 ± 0.91 g/DM) and propionic acid (4.58 ± 0.78 g/DM) were measured in untreated non-pressed silage samples (B). The highest (P < 0.01) contents of acetic acid and ethanol were found in control silage samples. The quality of these silages was evaluated as very low.  

scholarly journals Poly(lactic acid)–Poly(butylene succinate)–Sugar Beet Pulp Composites; Part II: Water Absorption Characteristics with Fine and Coarse Sugar Beet Pulp Particles; A Phenomenological Investigation

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3558
Author(s):  
Rodion Kopitzky
Keyword(s):  
Sugar Beet ◽  
Water Absorption ◽  
Time Scale ◽  
Absorption Capacity ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
General Description ◽  
Water Absorption Capacity ◽  
Water Binding ◽  
Beet Pulp

Sugar beet pulp (SBP) is a residue available in large quantities from the sugar industry, and can serve as a cost-effective bio-based and biodegradable filler for fully bio-based compounds containing bio-based polyesters. The composition of SBP is characterized by an unusually high content of pectins, which are known as water-binding substances. Their molecular structure and the poor gelling properties, compared to other pectin sources, do not allow industrial use on a larger scale. However, good water absorption capacity can be advantageous for promoting plastics degradation or disintegration in the environment. In this study, we evaluated the water absorption capacity and processes of SBP-filled composites with bio-based polyesters on a longer time scale. We analyzed water absorption from a phenomenological point of view and tried to derive basic parameters for the general description of the composites behavior. We found that polar polyesters or polyester blends filled with higher amounts of especially coarse SBP suffer disintegration within a few weeks when supplied with sufficient water. On the other hand, less polar polyesters filled with fine SBP rather absorb water but do not show disintegration for several months. On a time scale of a few years, catalytic disintegration of the composites appears to be independent of the addition of SBP.

Sign in / Sign up

Export Citation Format

Share Document