KARAKTERISASI BIOPLASTIK DARI RUMPUT LAUT (EUCHEUMA COTTONII) DAN PATI SINGKONG DENGAN PENAMBAHAN PATI BIJI ALPUKAT

The increasing use of plastics in everyday life results in environmental pollution. Synthetic plastic isdifficult to be degraded in nature, so we need the main material for making environmentally friendlyplastics. This research was conducted to synthesize seaweed-based biodegradable plastic (Eucheumacottonii) mixed with cassava starch and polysaccharides derived from various tropical fruit seeds thatare widely available in Indonesia such as avocado and durian with a composition ratio of 3:8:1.Characterization carried out included functional group analysis with FTIR, mechanical properties(tensile strength) and biodegradability.

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THE INFLUENCE OF COMPOSITION OF CNT (CARBON NANOTUBE) ON THE PHYSICAL PROPERTIES OF BIOPLASTIC MADE FROM CASSAVA STARCH

Jurnal Sains Materi Indonesia ◽

10.17146/jsmi.2019.20.4.5514 ◽

2019 ◽

Vol 20 (4) ◽

pp. 174

Author(s):

Masitoh Mangsur ◽

Akbar Hanif Dawam Abdullah ◽

Rahmat Firman Septiyanto ◽

Yus Rama Denny Muchtar ◽

Isriyanti Affifah

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Carbon Nanotube ◽

Aspergillus Niger ◽

Physical Properties ◽

Functional Group ◽

Morphological Characteristics ◽

Cassava Starch ◽

Test Results ◽

Hot Press

Bioplastics are starch-based polymers that are easily degraded by microorganisms, so they can be used as an alternative to the use of conventional plastics. In this research, bioplastics made from cassava starch was made using glycerol as plasticizer and used MWCNTs (Multi-Wall CNTs) type CNT as reinforcement with variations in the composition of 0%, 1%, 2%, and 3%. Bioplastics are made with a dry method (dry blending) with stages of pre-mixing, mixing, hot press and cold press. Characteristics of bioplastic starch/CNT include tensile strength, biodegradation and morphological. The test results show that the addition of CNT composition affects the mechanical properties of bioplastics. The optimum value of tensile strength occurred in the addition of 2% CNT at 13.52 MPa. Biodegradable test results using the Aspergillus niger mushroom prove that bioplastic starch/CNT can be degraded well. The results of morphological characteristics in the form of SEM results showed that 3% bioplastic starch / CNT had cracks and resulted in decreased tensile strength. FTIR test results indicate the presence of a new functional group C≡C because of the addition of CNT.

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Instrumental methods of organic functional group analysis

Analytica Chimica Acta ◽

10.1016/s0003-2670(01)80216-6 ◽

1973 ◽

Vol 66 (1) ◽

pp. 159

Author(s):

A.M.G. Macdonald

Keyword(s):

Functional Group ◽

Group Analysis ◽

Organic Functional Group ◽

Functional Group Analysis ◽

Instrumental Methods

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Characteristics of nanoclay reinforced starch biocomposites through the extrusion process

MATEC Web of Conferences ◽

10.1051/matecconf/201820400008 ◽

2018 ◽

Vol 204 ◽

pp. 00008

Author(s):

Heru Suryanto ◽

Alfian Widi Rahmawan ◽

Solichin ◽

Sahana Rizki Tata ◽

Uun Yanuhar

Keyword(s):

Tensile Strength ◽

Functional Group ◽

Extrusion Process ◽

Cassava Starch ◽

Diffraction Peak ◽

Screw Extruder ◽

Materials Engineering ◽

Single Screw ◽

Single Screw Extruder ◽

Composite Properties

The development of materials engineering has led to many significant discoveries one of which is biocomposite with its diverse applications. The addition of reinforcing materials in biopolymers improves the composite properties. This study aimed at investigating the effect of adding nanoclay on the tensile strength, morphology, functional group, and structure of extruded biocomposites with cassava starch matrix. This experimental research involved different concentrations of nanoclay i.e. 0%, 2.5%, 5%, 7.5%. The extrusion process was performed using a single screw extruder at 120°C. The samples were characterized by tensile testing, XRD, and SEM. The biocomposite reinforced with 5% nanoclay had the highest tensile strength of 10.8 MPa. The highest diffraction peak at 2θ of 19.4° appeared in the sample added with 5% nanoclay. The addition of excessive amounts of nanoclay can hinder the formation of exfoliated structures.

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