Pengujian mekanis komposit rice starch – organic clay sebagai bahan alternatif kotak pendingin makanan

Made Ery Arsana;  ; I Kadek Ervan Hadi Wiryanta; I Putu Adi Wiguna; I Nyoman Artha Gunawan;  ;  ;

doi:10.31940/jametech.v2i2.2717

Pengujian mekanis komposit rice starch – organic clay sebagai bahan alternatif kotak pendingin makanan

Journal of Applied Mechanical Engineering and Green Technology ◽

10.31940/jametech.v2i2.2717 ◽

2021 ◽

Vol 2 (2) ◽

pp. 85-90

Author(s):

Made Ery Arsana ◽

◽

I Kadek Ervan Hadi Wiryanta ◽

I Putu Adi Wiguna ◽

I Nyoman Artha Gunawan ◽

...

Keyword(s):

Citric Acid ◽

Corn Starch ◽

Rice Starch ◽

Organic Clay

Sampah plastik sudah menjadi permasalahan yang menjadi isu utama mengenai sampah di dunia saat ini. Produksi plastik di dunia sudah mencapai 8300 juta metrik ton (Mt) dari tahun 1950 sampai tahun 2015 dan 6.300 Mt adalah limbah berupa sampah plastik. Upaya yang bisa kita lakukan untuk mengurangi limbah plastik ini, dengan menggunakan plastik yang ramah lingkungan seperti bio-plastik. Bio-plastik dapat terurai di alam secara alami. Berbagai teknologi pembuatan bioplastik berdasarkan dari tumbuhan yang dapat tumbuh di Indonesia telah diperkenalkan, termoplastic tersebut menggunakan bahan dasar pati terutama corn starch (kanji) dan getah pohon pinus. Pembuatan plastic dari rice starch (beras) pada penelitian ini. dilakukan dengan bantuan penggunaan gliserol, citric acid dan clay (tanah liat) dan selanjutnya dilakukan pemanasan 100°C sampai 150°C. Komposit bioplastik yang terbentuk dicetak untuk pembuatan specimen uji tarik dan untuk material kotak pendingin makanan. Adanya campuran gliserol dan citric acid dapat membantu proses biodegradable komposit tersebut. Sedangkan campuran tanah liat digunakan untuk membantu matrik plastic agar lebih kuat secara struktur serta diharapkan akan dapat meningkatkan tahanan termalnya.

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Addition of galactomannans and citric acid in corn starch processed by extrusion: Retrogradation and resistant starch studies

Food Hydrocolloids ◽

10.1016/j.foodhyd.2018.03.009 ◽

2018 ◽

Vol 83 ◽

pp. 485-496 ◽

Cited By ~ 15

Author(s):

Erich von Borries-Medrano ◽

Mónica R. Jaime-Fonseca ◽

Miguel A. Aguilar-Méndez ◽

Héctor I. García-Cruz

Keyword(s):

Citric Acid ◽

Resistant Starch ◽

Corn Starch

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Influence of Starch Composition and Molecular Weight on Physicochemical Properties of Biodegradable Films

Polymers ◽

10.3390/polym11071084 ◽

2019 ◽

Vol 11 (7) ◽

pp. 1084 ◽

Cited By ~ 17

Author(s):

Daniel Domene-López ◽

Juan Carlos García-Quesada ◽

Ignacio Martin-Gullon ◽

Mercedes G. Montalbán

Keyword(s):

Molecular Weight ◽

Corn Starch ◽

Amylose Content ◽

Potato Starch ◽

Thermoplastic Starch ◽

Grain Structure ◽

Rice Starch ◽

Hydration Properties ◽

Casting Technique ◽

Starch Films

Thermoplastic starch (TPS) films are considered one of the most promising alternatives for replacing synthetic polymers in the packaging field due to the starch biodegradability, low cost, and abundant availability. However, starch granule composition, expressed in terms of amylose content and phosphate monoesters, and molecular weight of starch clearly affects some film properties. In this contribution, biodegradable TPS films made from potato, corn, wheat, and rice starch were prepared using the casting technique. The effect of the grain structure of each starch on microstructure, transparency, hydration properties, crystallinity, and mechanical properties of the films, was evaluated. Potato starch films were the most transparent and corn starch films the most opaque. All the films had homogeneous internal structures—highly amorphous and with no pores, both of which point to a good starch gelatinization process. The maximum tensile strength (4.48–8.14 MPa), elongation at break (35.41–100.34%), and Young’s modulus (116.42–294.98 MPa) of the TPS films were clearly influenced by the amylose content, molecular weight, and crystallinity of the film. In this respect, wheat and corn starch films, are the most resistant and least stretchable, while rice starch films are the most extensible but least resistant. These findings show that all the studied starches can be considered suitable for manufacturing resistant and flexible films with similar properties to those of synthetic low-density polyethylene (LDPE), by a simple and environmentally-friendly process.

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Structural characteristics of low-glycemic response rice starch produced by citric acid treatment

Carbohydrate Polymers ◽

10.1016/j.carbpol.2009.05.017 ◽

2009 ◽

Vol 78 (3) ◽

pp. 588-595 ◽

Cited By ~ 35

Author(s):

Sang Ick Shin ◽

Chang Joo Lee ◽

Mi Jung Kim ◽

Seung Jun Choi ◽

Hye Jin Choi ◽

...

Keyword(s):

Citric Acid ◽

Acid Treatment ◽

Structural Characteristics ◽

Rice Starch ◽

Glycemic Response

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Mimicking Bone Architecture in a Metallic Structure

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.84.7 ◽

2012 ◽

Vol 84 ◽

pp. 7-12 ◽

Cited By ~ 1

Author(s):

Tamiye Simone Goia ◽

Kalan Bastos Violin ◽

José Carlos Bressiani ◽

Ana Helena de Almeida Bressiani

Keyword(s):

Corn Starch ◽

Bone Structure ◽

Potato Starch ◽

High Vacuum ◽

Total Porosity ◽

Bone Architecture ◽

Rice Starch ◽

Metallic Structure ◽

Air Oxidation ◽

Bone Implant

The porous metallic structure has been developed to mimic the natural bone architecture, having interconnected porosity, disposing enough room to cell migration, anchoring, vascularization, nourishing and proliferation of new bone tissue. The titanium is used as porous implants due its excellent mechanical properties and biological interaction. Research evolving porous titanium has been done with purpose to achieve desirable pore size, total porosity percentage and influence of those in the increasing of bone-implant bond strength interface. Were prepared samples of titanium by powder metallurgy adding natural polymer: corn starch, rice starch, potato starch and gelatin; at proportion of 16 wt%. In aqueous solution the hydrogenated metallic powder (TiH2) and the polymer were mixed, homogenized and frozen in molds near net shape. The water was removed in kiln (38°C/12h) and the polymer by thermal treatment with air-oxidation (350 °C/1h) before sintering in high-vacuum (1300 °C/1h). Resulting from the process, the obtained pores by addition of potato and corn starchs, lead to homogenous and well distributed throughout structure. Samples obtained from addition of rice starch and gelatin formed macropores and micropores randomly distributed within the structure. The apparent porosity for all samples was near 40%. The processing technique allowed the open pore formation, in which the macropores mimics the trabecular bone structure and micropores allows the bone-implant anchorage.

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Citric acid-modified starch as an environmentally friendly binder for wood composite making

BioResources ◽

10.15376/biores.15.2.4234-4248 ◽

2020 ◽

Vol 15 (2) ◽

pp. 4234-4248 ◽

Cited By ~ 2

Author(s):

Mohd Hazim Mohamad Amini ◽

Rokiah Hashim ◽

Nurul Syuhada Sulaiman ◽

Mazlan Mohamed ◽

Othman Sulaiman

Keyword(s):

Citric Acid ◽

Corn Starch ◽

Urea Formaldehyde ◽

Modulus Of Rupture ◽

Bending Test ◽

Formaldehyde Resin ◽

Infrared Analysis ◽

Modified Starch ◽

Wood Composite ◽

Wood Composites

Conventional formaldehyde-based wood binders for composites have been reported as hazardous to humans after prolonged exposure to released fumes. Therefore, this research was conducted to evaluate suitability of citric acid-modified corn starch as binder for wood composites. Corn starch was gelatinized before it was reacted with citric acid, mixed with wood particles, pre-pressed, and finally hot-pressed before characterization and evaluation. Through Fourier transform infrared analysis, ester groups were detected at 1736.8 cm-1, which was characteristic for starch modified with citric acid. Bending test results on citric acid modified corn starch wood composites showed 16.8 N/mm2 and 4020 N/mm2 for modulus of rupture and modulus of elasticity, respectively. Addition of 2% urea-formaldehyde increased these numbers to 17.9 N/mm2 and 5190 N/mm2, respectively. Internal bonding additionally increased from 0.88 N/mm2 to 0.95 N/mm2. All test specimens passed mechanical strength requirements by JIS A 5908 (2003). Based on the demand specification for the final usage of the wood composite, it can be concluded that citric acid modified starch is a possible successful choice as the adhesive, with or without additional urea formaldehyde resin.

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