scholarly journals Pengaruh Kadar Air Dan Jenis Plastisizer Terhadap Sifat Fisik Plastik Biodegradable Dari Campuran Pati Jagung Dan Polivinil Alkohol

2019 ◽  
pp. 18-27
Author(s):  
Budi Utami ◽  
Hendartini Hendartini
Keyword(s):  
Environmental Problem ◽  
Corn Starch ◽  
Solid Material ◽  
Barrier Properties ◽  
Nucleating Agent ◽  
Biodegradable Plastic ◽  
The Other ◽  
Glycerol Monostearate ◽  
Plastic Packaging ◽  
Alternative Choice

Recently the use of plastic packaging is become avoided because their waste will create environmental problem. As an alternative choice the use of biodegradable plastic packaging has been developed Research on biodegradable plastic has been carried out to study the effect of water content and kind of plasticizer on mechanical properties of the biodegradable plastic made from corn starch and polyvinyl alcohol. The result shows that water can increase the elongation of the plastic, but on the other hand it can decrease the tensile strength and barrier properties by increasing the water vapour transsmision rate. Therefore the use of water as a plasticizer must be mixed with other plasticizer such as glycerol, sorbitol, polyethylene glycol and glycerol monostearate. In this study the best result is by using mixture of water andsorbitol with ratio = 5: I and the ratio of solid material (starch + PVOH +nucleating agent) and plasticizer = 1 : I.

Teks Anekdot dalam Cerita Lisan Yong Dollah Pewarisan Orang Melayu Sebagai Alternatif Pemilihan Bahan Ajar Bahasa Indonesia

GERAM ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 30-43
Author(s):  
Muhammad Mukhlis ◽  
Asnawi Asnawi
Keyword(s):  
Content Analysis ◽  
Research Method ◽  
The Other ◽  
Teaching Material ◽  
Generic Structure ◽  
Alternative Material ◽  
Descriptive Approach ◽  
Alternative Choice ◽  
Generic Structures ◽  
Bahasa Indonesia

This research is entitled as "Anecdotal Text in the Oral Story of Yong Dollah Inheritance of Malays as Alternative Choice for Indonesian Language Teaching Materials". It is inspired by the collection of Yong Dollah stories as the inheritance of Malays in Bengkalis Regency which contain of humor elements. In addition, the stories have the same characteristics with anecdotal text, so that it can be applied as teaching material for Indonesia Language subject in the school. This research method was content analysis of descriptive approach. This research was conducted during six months. The technique used to collect data were documentation and interview. The data of this study were the entire generic structure and language features of anecdotal texts contained in a collection of Yong Dollah stories which consisted of 11 stories. The result showed that as following. First, there are five texts contain of complete generic structures and six texts contain of incomplete generic structure which is coda part for data 2, 3, 5, 8, and 1. Second, about language features, there are four data contains of all language features of Anecdote text, but on the other side, there are seven incomplete language features in the texts. Third, the consideration of choosing Yong Dollah as alternative material for Indonesia Language subject refers to eight indicators that are conveyed based on teachers’ perception toward Anecdote text Yong Dolla. 55 % of number of teachers claim that these texts suitable to be implemented as teaching material, but 44% of them claim neutral, and 1% claim disagree on it.

scholarly journals Fabrication and characterization of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite

e-Polymers ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 038-046
Author(s):  
Xu Yan ◽  
Wanru Zhou ◽  
Xiaojun Ma ◽  
Binqing Sun
Keyword(s):  
Thermal Stability ◽  
Oxygen Permeability ◽  
Water Vapor Permeability ◽  
Barrier Properties ◽  
Nucleating Agent ◽  
Vapor Permeability ◽  
Casting Method ◽  
Increasing Trend ◽  
Solution Casting Method

Abstract In this study, a poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) modified with nano-montmorillonite biocomposite (MMT/PHBH) was fabricated by solution-casting method. The results showed that the addition of MMT increased the crystallinity and the number of spherulites, which indicated that MMT was an effective nucleating agent for PHBH. The maximum decomposition peak of the biocomposites moved to a high temperature and residue presented an increasing trend. The biocomposites showed the best thermal stability at 1 wt% MMT. Compared with PHBH, 182.5% and 111.2% improvement in elastic modulus and tensile strength were obtained, respectively. Moreover, the oxygen permeability coefficient and the water vapor permeability of MMT/PHBH biocomposites decreased by 43.9% and 6.9%, respectively. It was also found that the simultaneous enhancements on the crystallizing, thermal stability, mechanical, and barrier properties of biocomposites were mainly caused by the formation of intercalated structure between PHBH and MMT.

scholarly journals Modern Biodegradable Plastics—Processing and Properties Part II

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2523
Author(s):  
Janusz W. Sikora ◽  
Łukasz Majewski ◽  
Andrzej Puszka
Keyword(s):  
Water Vapor ◽  
Rotational Speed ◽  
Corn Starch ◽  
Potato Starch ◽  
Reference Sample ◽  
Film Surface ◽  
Barrier Properties ◽  
Processing Parameters ◽  
Biodegradable Plastics ◽  
Film Blowing

Four different plastics were tested: potato starch based plastic (TPS-P)–BIOPLAST GF 106/02; corn starch based plastic (TPS-C)–BioComp BF 01HP; polylactic acid (polylactide) plastic (PLA)—BioComp BF 7210 and low density polyethylene, trade name Malen E FABS 23-D022; as a petrochemical reference sample. Using the blown film extrusion method and various screw rotational speeds, films were obtained and tested, as a result of which the following were determined: breaking stress, strain at break, static and dynamic friction coefficient of film in longitudinal and transverse direction, puncture resistance and strain at break, color, brightness and gloss of film, surface roughness, barrier properties and microstructure. The biodegradable plastics tested are characterized by comparable or even better mechanical strength than petrochemical polyethylene for the range of film blowing processing parameters used here. The effect of the screw rotational speed on the mechanical characteristics of the films obtained was also demonstrated. With the increase in the screw rotational speed, the decrease of barrier properties was also observed. No correlation between roughness and permeability of gases and water vapor was shown. It was indicated that biodegradable plastics might be competitive for conventional petrochemical materials used in film blowing niche applications where cost, recyclability, optical and water vapor barrier properties are not critical.

scholarly journals Genetic variability in four samples of Neoplecostomus yapo (Teleostei: Loricariidae) from the rio Paranapanema basin, Brazil

2009 ◽  
Vol 7 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Juliana S. Philippsen ◽  
Erasmo Renesto ◽  
Ana Maria Gealh ◽  
Roberto F. Artoni ◽  
Oscar A. Shibatta ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Genetic Distance ◽  
Corn Starch ◽  
The Other ◽  
Allozyme Electrophoresis ◽  
Polymorphic Loci ◽  
Two Samples ◽  
Starch Gel ◽  
The Mean ◽  
Electrophoresis Technique

Four samples of Neoplecostomus yapo were analyzed through the allozyme electrophoresis technique in corn starch gel. The allozyme pattern was similar to those found in N. paranensis with 24 loci scored. Two samples (ribeirão Atlântico and ribeirão Uraí) showed monomorphic bands for all 24 loci, whereas the other two (rio Verde and rio Fortaleza) showed 8.3% of polymorphic loci. The He genetic variability estimates for the rios Verde and Fortaleza populations were 0.0195 and 0.0179, respectively, too much inferior to the mean heterozygosity summed to species from the whole world (0.051). The Wright statistical values F IS = 0.5181, F IT = 0.5681 and F ST = 0.1039 and the genetic distance of Nei values showed that the four samples are genetically very similar to each other and that there is homozygote excess in the polymorphic loci.

Impact of ghosts on the mechanical, optical, and barrier properties of corn starch films

2017 ◽  
Vol 69 (1-2) ◽  
pp. 1600308 ◽  
Author(s):  
Angeles Garcia-Hernandez ◽  
E. Jaime Vernon-Carter ◽  
Jose Alvarez-Ramirez
Keyword(s):  
Corn Starch ◽  
Barrier Properties ◽  
Starch Films

Barrier and biodegradable properties of corn starch-derived biopolymer film filled with nanoclay fillers

2016 ◽  
Vol 33 (3) ◽  
pp. 309-336 ◽  
Author(s):  
TP Mohan ◽  
Kay Devchand ◽  
K Kanny
Keyword(s):  
Water Absorption ◽  
Corn Starch ◽  
Barrier Properties ◽  
Mechanical Analysis ◽  
Oxygen Permeation ◽  
Transmission Electron Microscopy Analysis ◽  
Transmission Electron ◽  
Before And After ◽  
Electron Microscopy Analysis ◽  
Nanoclay Content

The objective of this work is to study the effect of nanoclay fillers on the biodegradation and barrier properties of corn starch polymer-based biofilm. Starch derived from corn plant source was used to prepare a biofilm by plasticization method. The barrier properties, namely, water absorption, moisture permeation, oxygen permeation and swelling of unfilled and nanoclay-filled corn starch biofilms were examined. The results indicate: ∼22% reduced water absorption, 40% reduced moisture uptake, 30% reduced oxygen permeation and 31% reduced swelling for 2–3 wt.% nanoclay-filled biofilm, when compared with unfilled biopolymer. The biodegradation result of unfilled and nanoclay-filled film series indicates that the nanoclay addition delays the biodegradation and is a function of nanoclay content in the film. The tensile, dynamic mechanical analysis and biodegradable studies were conducted on the biopolymers before and after water absorption, and the result shows that the nanoclay-filled biopolymer increased these properties when compared with unfilled biopolymer even after water absorption and is dependent on the nanocomposite structure and morphology as examined by X-ray diffraction and transmission electron microscopy analysis.

scholarly journals Sustainable Bioactive Packaging Based on Thermoplastic Starch and Microalgae

2021 ◽  
Vol 23 (1) ◽  
pp. 178
Author(s):  
Anna Martina Tedeschi ◽  
Fabrizio Di Caprio ◽  
Antonella Piozzi ◽  
Francesca Pagnanelli ◽  
Iolanda Francolini
Keyword(s):  
Corn Starch ◽  
Transmission Rate ◽  
Thermoplastic Starch ◽  
Packaging Material ◽  
Water Vapor Transmission Rate ◽  
Mechanical Stiffness ◽  
Plastic Packaging ◽  
Flexible Packaging ◽  
Starch Films ◽  
Tetradesmus Obliquus

This study combines the use of corn starch and Tetradesmus obliquus microalgae for the production of antioxidant starch films as flexible packaging material. Starch was plasticized with glycerol and blended with 1 w% polyallylamine chosen as an agent to modify the film physical properties. The addition of polyallylamine improved film water stability and water vapor transmission rate as well as mechanical stiffness and tenacity. The dried Tetradesmus obliquus microalgae, which showed an EC50 value of 2.8 mg/mg DPPH (2.2-Diphenyl-1-picrylhydrazyl radical), was then used as antioxidant filler. The addition of microalgae provided the films with good antioxidant activity, which increased with microalgae content increasing. To our knowledge, this is the first study reporting the development of sustainable bioactive packaging films composed of almost 100% starch, and follows the European union’s goals on plastics strategy concerning the promotion of bio-based, compostable plastics and the setting up of approaches to prevent food waste with a simple plastic packaging.

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