scholarly journals Physical and Mechanical Properties of Walnut Shell Flour-Filled Thermoplastic Starch Composites

BioResources ◽  
2016 ◽  
Vol 11 (3) ◽  
Author(s):  
Narjes Abdolhosseini Sarsari ◽  
Shademan Pourmousa ◽  
Ajang Tajdini
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Thermoplastic Starch ◽  
Walnut Shell ◽  
Walnut Shell Flour

scholarly journals DETERMINATION OF PHYSICAL-MECHANICAL PARAMETERS OF WALNUTS

2019 ◽  
pp. 12-17
Author(s):  
Yurii Polievoda ◽  
Igor Tverdokhlib
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Walnut Shell ◽  
Mechanical Parameters ◽  
Peeling Process ◽  
Energy Indices

The information about growing and processing of walnut in Europe and Ukraine is given. The actuality of the implementation of peeling, maximally preserved nuts is established. Based on the conducted research, the physical and mechanical properties of walnut shell are determined. The rational energy indices of the peeling process are found at maximum preservation of the fetus. The use of the developed equipment for preliminary peeling of the walnut in order to get microcracks is proposed.

scholarly journals Study of the Physical and Mechanical Properties of Thermoplastic Starch/Poly(Lactic Acid) Blends Modified with Acid Agents

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 578
Author(s):  
Carolina Caicedo ◽  
Heidy Lorena Calambás Pulgarin
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Organic Acids ◽  
Physical And Mechanical Properties ◽  
Thermoplastic Starch ◽  
Poly Lactic Acid ◽  
Thermal Transitions ◽  
Surface Polarity ◽  
Acid Agent ◽  
Structural Affinity

In this work, we present a functionalization strategy of starch-poly(lactic acid) (PLA) blends with organic acids. Lactic and acetic acid were used as acid agents, and oleic acid was also included in the previous acids, with the aim of finding a synergy that thermodynamically benefits the products and provides hydrophobicity. The ratio of starch and sorbitol was 70:30, and the added acid agent replaced 6% of the plasticizer; meanwhile, the thermoplastic starch (TPS)–PLA blend proportion was 70:30 considering the modified TPS. The mixtures were obtained in a torque rheometer at 50 rpm for 10 min at 150 °C. The organic acids facilitated interactions between TPS and PLA. Although TPS and PLA are not miscible, PLA uniformly dispersed into the starch matrix. Furthermore, a reduction in the surface polarity was achieved, which enabled the wettability to reach values close to those of neat PLA (TPS–L-PLA increased by 55% compared to TPS–PLA). The rheological results showed a modulus similar to that of TPS. In general, there were transitions from elastic to viscous, in which the viscous phase predominated. The first and second-order thermal transitions did not show significant changes. The structural affinity of lactic acid with biopolymers (TPS–L-PLA) allowed a greater interaction and was corroborated with the mechanical properties, resulting in a greater resistance with respect to pure TPS and blended TPS–PLA (28.9%). These results are particularly relevant for the packaging industry.

Physical and mechanical properties of thermoplastic starch/montmorillonite nanocomposite films

2008 ◽  
Vol 73 (1) ◽  
pp. 55-63 ◽  
Author(s):  
Viviana P. Cyras ◽  
Liliana B. Manfredi ◽  
Minh-Tan Ton-That ◽  
Analía Vázquez
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Thermoplastic Starch ◽  
Nanocomposite Films

Thermoplastic starch as a component of film-forming compositions with degradable properties

2021 ◽  
Vol 43 (2) ◽  
pp. 73-78
Author(s):  
T.V. Dmitrieva ◽  
◽  
S.K. Krymovska ◽  
G.E. Glieva ◽  
S.V. Riabov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Thermoplastic Starch ◽  
Extrusion Process ◽  
Polypropylene Glycol ◽  
Technological Parameters ◽  
Biodegradable Film ◽  
Film Forming ◽  
Wide Range ◽  
Crosslinking Agents

A review of the literature on the production of thermoplastic starch, which is an integral part of biodegradable polymer compositions. The analysis of plasticizing additives, influence of their functional groups, chemical structure and technological parameters on physical and mechanical properties of starch compositions is carried out. The list of plasticizing additives studied should include: glycerin, water, polyethylene glycol, polypropylene glycol. Sorbitol, formamide, xylitol, dimethyl sulfoxide, gelatin, maleic anhydride, epoxidized compounds are defined as structure-forming additives. To improve the physical and mechanical properties of the starch, the addition of crosslinking agents such as citric, boric, or ascorbic acid has been proposed. According to the above review of studies, it can be stated that when creating thermoplastic starch, it is mandatory to use both plasticizing components and structure-forming, which allows the processing of thermoplastic starch by extrusion with subsequent granulation. Thermoplasticized starch due to various plasticizing additives and technological parameters of its production acquires a wide range of characteristics, which solves the problem of creating biodegradable film-forming materials. Depending on the goals, the second component of such materials may be synthetic polymers: polyethers, polycaprolactone, polyolefins, polyterephthalates, PVA and others. Technological parameters of processing in the extrusion process range from 115 °C to 190 °C in the extrusion process, which does not establish an optimized technology for thermoplastic starch and requires further research.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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