Baked hydrogel from corn starch and chitosan blends cross‐linked by citric acid: Preparation and properties

2020 ◽  
Vol 31 (6) ◽  
pp. 1256-1269 ◽  
Author(s):  
Hamed Peidayesh ◽  
Zahed Ahmadi ◽  
Hossein Ali Khonakdar ◽  
Majid Abdouss ◽  
Ivan Chodák
Keyword(s):  
Citric Acid ◽  
Corn Starch ◽  
Chitosan Blends

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

2018 ◽  
Vol 83 ◽  
pp. 485-496 ◽  
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

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

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 4234-4248 ◽  
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.

Optimization of an Extrusion Cooking Process to Increase Formation of Resistant Starch from Corn Starch with Addition of Citric Acid

2019 ◽  
Vol 72 (3-4) ◽  
pp. 1900150 ◽  
Author(s):  
David Neder‐Suárez ◽  
Carlos Abel Amaya‐Guerra ◽  
Esther Pérez‐Carrillo ◽  
Armando Quintero‐Ramos ◽  
Gerardo Mendez‐Zamora ◽  
...  
Keyword(s):  
Citric Acid ◽  
Resistant Starch ◽  
Corn Starch ◽  
Extrusion Cooking ◽  
Cooking Process

Utilization of Metabolic Citric Acid from Aspergillus niger Using Corn Starch in the Nickel Leaching of Indonesian Saprolitic Ore

2015 ◽  
Vol 1130 ◽  
pp. 251-254
Author(s):  
Widi Astuti ◽  
Tsuyoshi Hirajima ◽  
Keiko Sasaki ◽  
Naoko Okibe
Keyword(s):  
Citric Acid ◽  
Carbon Source ◽  
Acid Concentration ◽  
Atmospheric Pressure ◽  
Corn Starch ◽  
Low Grade ◽  
Citric Acid Concentration ◽  
Nickel Extraction ◽  
Nickel Recovery ◽  
Nickel Leaching

Citric acid has been proved to be the most effective organic acid for nickel extraction from nickel lateritic ores. Citric acid can be produced from fungal metabolism by utilizing several types of carbon source as fungal nutrient. In the current experiment, production of metabolic citric acid from metabolism of Aspergillus niger by using corn starch as a carbon source was investigated. The application of the citric acid produced in the leaching of nickel from Indonesian saprolitic ore under atmospheric pressure was also conducted. The optimum citric acid concentration (i.e. around 0.05 M) can be produced by using 5% w/v of corn starch after 5 days incubation of A. niger, 30°C of temperature, shaker speed of 120 rpm, and 3% v/v of methanol as an additive. The metal leaching of Indonesian saprolitic ore was conducted using <75μm of ore particle size, 5% w/v of pulp density and 200 rpm of shaker speed at different leaching temperatures (30°C, 40°C, and 60°C). The results showed that the optimum nickel recovery (around 40%) can be reached after 3 days of leaching process at 40°C. It was also found that the use of metabolic citric acid was more effective for nickel leaching compared to the use of chemical citric acid at similar citric acid concentration (i.e. 0.05 M). It can be concluded that the metabolic citric acid produced from corn starch by A. niger will be an excellent leaching reagent for extracting nickel from low-grade Indonesian saprolitic ore.

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

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.

An electrochemical approach for citric acid treatment of corn starch granules

2016 ◽  
Vol 68 (5-6) ◽  
pp. 558-567
Author(s):  
Carmen Hernandez-Jaimes ◽  
Eduardo Jaime Vernon-Carter ◽  
Consuelo Lobato-Calleros ◽  
Luis Arturo Bello-Perez ◽  
Jose Alvarez-Ramirez
Keyword(s):  
Citric Acid ◽  
Acid Treatment ◽  
Corn Starch ◽  
Starch Granules ◽  
Electrochemical Approach
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