scholarly journals Synthesis of Corn Starch Derivatives and Their Application in Yarn Sizing

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1251
Author(s):  
Stana Kovačević ◽  
Ivana Schwarz ◽  
Suzana Đorđević ◽  
Dragan Đorđević
Keyword(s):  
Corn Starch ◽  
Raw Material ◽  
Hydroxyethyl Methacrylate ◽  
Yarn Properties ◽  
Cotton Yarns ◽  
Starch Derivatives ◽  
Environmental Contribution ◽  
Fabric Production ◽  
Lower Size ◽  
Yarn Surface

The use of synthesized natural starches for the sizing process in fabric production is primarily an environmental contribution. Synthesized corn starch is environmentally friendly and productive, showing good results in cotton yarn sizing. Acrylamide (AA) and 2-hydroxyethyl methacrylate (HEMA) were applied for the grafting process of corn starch, and the initiators azobisisobutyronitrile (AIBN), potassium persulfate (KPS), and benzoyl peroxide (BP) were chosen to form the grafted monomers more effectively. The application of synthesized corn starch has been confirmed, especially with the AIBIN initiator in the grafting process of HEMA onto starch. The FTIR analysis confirmed that new and efficient products for sizing cotton yarns based on natural raw material (corn) were developed. The research showed that the synthesized corn starch improved physical-mechanical yarn properties and abrasion resistance and reduced yarn surface hairiness. Ultrasonic desizing of yarn and the use of a lower size concentration led to better results than desizing by washing, and the Tegewa numbers confirmed that the desizing process was successful.

scholarly journals Preparation of starch phosphate carbamides and its application for improvement of noodle quality

2019 ◽  
Vol 37 (No. 6) ◽  
pp. 456-462 ◽  
Author(s):  
Yaojun Sun ◽  
Shengru Yang ◽  
Guanglei Li ◽  
Mengxing Li
Keyword(s):  
Corn Starch ◽  
High Viscosity ◽  
Pasting Properties ◽  
Gelatinization Temperature ◽  
Dry Process ◽  
Starch Derivatives ◽  
Major Factors ◽  
Phosphate Salts ◽  
Quadratic Models ◽  
Viscosity Stability

Phosphorylated corn starch derivatives show improved pasting properties compared to native corn starch. In this study, starch phosphate carbamides (SPC) were prepared through a dry process reaction of starch with urea and phosphate salts. The effects of major factors on SPC pasting properties were studied by response surface methodology. Validation results showed that the polynomial quadratic models were adequate for predicting SPC pasting properties. Fourier transform infrared spectroscopy (FTIR) and a Rapid Visco Analyzer (RVA) were used to characterize SPC. RVA results showed SPC had higher peak viscosity, trough, breakdown, setback and final viscosities and lower gelatinization temperature compared to native starch. FTIR showed the characteristic absorption of the ester phosphate group in SPC at 1244/cm. SPC with high viscosity stability were applied to replace part of wheat flour used for making noodles. The best quality noodles were obtained with 12% SPC substitution. 

scholarly journals Pemberdayaan Kelompok Tenun Nari-Nari Melalui Pewarnaan Benang Menggunakan Ekstrak Kayu Kuning Dan Kayu Mahoni

2020 ◽  
Vol 5 (2) ◽  
pp. 446-452
Author(s):  
Ruslan R ◽  
Agrippina Wiraningtyas ◽  
Ahmad Sandi ◽  
Muhammad Nasir
Keyword(s):  
Natural Dyes ◽  
Raw Material ◽  
Woven Fabric ◽  
Synthetic Dyes ◽  
Community Group ◽  
Training Stage ◽  
Red Color ◽  
Different Color ◽  
Fabric Production ◽  
The Cost

The "Nari-Nari" Weaving Village in Rabadompu Timur Village, Bima City, is a community group engaged in the weaving industry which has been carried on for generations. During this time, Bima woven fabric products use yarn raw material that has been colored using synthetic dyes. Yarn with synthetic dyes has a more diverse color, the fabric coloring process is easier and the cost is cheap, but synthetic dyes are carcinogenic and harmful to the environment. The solution to the problems faced by using natural dyes obtained from plants. This activity aims to train the Nari-Nari weaving group in yarn coloring using natural dyes. The method used is training through several stages of the activity namely the stage of socialization of activities; the training stage of yarn dyeing and woven fabric production. The dyes used are yellow wood extract and mahogany wood. The results obtained in this activity are the colored yarn has a different color based on the extract of the dye and fixation material. In yellow wood obtained with a maroon red color on alum, black on tunjung and reddish beige on lime. In mahogany wood is obtained beige on alum, black gray on tunjung and beige on lime.  

Improving fiber trapping with a contact surface during the ring twisting of two cotton yarns

2012 ◽  
Vol 82 (3) ◽  
pp. 272-279 ◽  
Author(s):  
Zhigang Xia ◽  
Weilin Xu ◽  
Xungai Wang
Keyword(s):  
Contact Surface ◽  
Plane Surface ◽  
Geometrical Model ◽  
Variation Analysis ◽  
Significance Level ◽  
Yarn Properties ◽  
Cotton Yarns ◽  
Grooved Surface ◽  
Yarn Hairiness ◽  
Plied Yarn

In this study, a geometrical model was introduced to improve the hair trapping via a surface contacting the yarn-twisting triangle during ring twisting of two single yarns. The fiber-trapping improvement with the contact surface was analyzed theoretically. Then, single Ne 80 ring cotton yarns were used to produce two-ply yarns under different ring-twisting conditions, namely conventional twisting, dry twisting of yarns with a plane surface, wet twisting of yarns with a plane surface, dry twisting of yarns with a grooved surface, and wet twisting of yarns with a grooved surface. Plied yarn properties, including yarn hairiness, strength, and irregularity, were tested. The Student Newman Keuls (SNK) test and variation analysis were also carried out in the SPSS program to study the effect of different contact surfaces on related yarn properties; the significance level was 0.05 for the SNK test and variation analysis. The hairiness of plied yarns was significantly reduced when twisting with the plane or grooved surface, especially for the wet twisting cases. This corresponds well with our model on improving fiber trapping.

Fiber Blending Irregularities in Cross Sections and on Yarn Surfaces in Relation to Yarn Properties

1988 ◽  
Vol 58 (5) ◽  
pp. 291-298 ◽  
Author(s):  
Izabella Krucińnska
Keyword(s):  
Surface Analysis ◽  
Cross Sections ◽  
Original Method ◽  
New Method ◽  
Cross Sectional ◽  
Yarn Properties ◽  
Yarn Surface ◽  
Fiber Blending

An analysis of fiber blending irregularities is presented in relation to the disturbances of blend yarn properties resulting from these phenomena. Fiber blending irregularities were assessed using the original method of yarn surface analysis and a new method of yarn cross-sectional division. These methods correctly reflect the disturbances in the mechanical and aesthetic yarn properties resulting from non-uniform mixing of constituent fibers.

scholarly journals Open-End Yarn Properties Prediction Using HVI Fibre Properties and Process Parameters

2017 ◽  
Vol 17 (1) ◽  
pp. 6-11 ◽  
Author(s):  
Hanen Ghanmi ◽  
Adel Ghith ◽  
Tarek Benameur
Keyword(s):  
Response Surface ◽  
Process Parameters ◽  
Processing Parameters ◽  
Raw Material ◽  
Spun Yarn ◽  
Yarn Properties ◽  
Spun Yarns ◽  
Yarn Count ◽  
Input Variables ◽  
Rotor Spun Yarn

AbstractThis article provides three models to predict rotor spun yarn characteristics which are breaking strength, breaking elongation and unevenness. These models used noncorrelated raw material characteristics and some processing parameters. For this purpose, five different cotton blends were processed into rotor spun yarns having different metric numbers (Nm10, Nm15, Nm18, Nm22, Nm30 and Nm37). Each count was spun at different twist levels. Response surface method was used to estimate yarn quality characteristics and to study variable effects on these characteristics. In this study, predicting models are given by the analysis of response surface after many iterations in which nonsignificant terms are excluded for more accuracy and precision. It was shown that yarn count, twist and sliver properties had considerable effects on the open-end rotor spun yarn properties. This study can help industrial application since it allows a quality management-prediction based on input variables such as fibre characteristics and process parameters.

Yarn and fabric properties in a modified ring spinning system considering the effect of the friction surface of the false-twister

2019 ◽  
Vol 90 (5-6) ◽  
pp. 572-580 ◽  
Author(s):  
Rong Yin ◽  
Xiao-Ming Tao ◽  
Bin-gang Xu
Keyword(s):  
Surface Roughness ◽  
Friction Surface ◽  
Experimental Results ◽  
Material Surface ◽  
Ring Spinning ◽  
Knitted Fabrics ◽  
Yarn Properties ◽  
Cotton Yarns ◽  
The Relationship

This paper experimentally studies the relationship between the friction surface of a false-twisting unit and the quality of cotton yarns produced by a modified ring spinning system, with the adoption of the single friction-belt false-twister. The friction surface of the false-twisting unit, as a key twisting component, has been studied in terms of material, surface roughness, hardness and diameter, as well as the interaction between these factors and resultant yarn properties, with particular attention to yarn imperfections. Experimental results showed that the false-twisting unit with a short interactive path demonstrated significant reduction of yarn imperfections, especially yarn neps. With the optimal false-twisting unit, performances of the modified yarns and their knitted fabrics were evaluated and compared with the conventional ones.

Optimization of Processing Technology of Acetylated Corn Starch Films

2012 ◽  
Vol 200 ◽  
pp. 267-270 ◽  
Author(s):  
Zhi Zhou Chen ◽  
Guo Ping Yin
Keyword(s):  
Polyvinyl Alcohol ◽  
Corn Starch ◽  
Orthogonal Experiment ◽  
Alcohol Concentration ◽  
Raw Material ◽  
Glycerol Concentration ◽  
Single Factor ◽  
Starch Concentration ◽  
Film Forming ◽  
Starch Films

Abstract. In this experiment acetylated corn starch was taken as the raw material and its filming property was studied through single-factor experiments and orthogonal experiment. The results showed that the different concentrations of acetylated corn starch, glycerol, polyvinyl alcohol (PVA) and glutaraldehyde had significant effects on the properties of the acetylated corn starch/PVA films. And the optimum film-forming conditions were 4.5% acetylated corn starch, 4.5% PVA, 4.0% glycerol and 0.4% glutaraldehyde for the coating liquid of film-forming, among which the most important factor was the glycerol concentration; the following factors were the acetylated corn starch concentration, the polyvinyl alcohol concentration and the glutaraldehyde concentration.

Development of Biodegradable Films Based on Durian Seed Starch

2012 ◽  
Vol 506 ◽  
pp. 311-314 ◽  
Author(s):  
W. Pimpa ◽  
C. Pimpa ◽  
P. Junsangsree
Keyword(s):  
Mechanical Properties ◽  
Water Vapor ◽  
Food Processing ◽  
Corn Starch ◽  
Water Vapor Permeability ◽  
Cassava Starch ◽  
Raw Material ◽  
Vapor Permeability ◽  
Biodegradable Films ◽  
Durian Seed

Fresh durian seed consists largely of starch and can be considered such a suitable raw material for producing biodegradable films. The aim of this work was to develop biodegradable films based on durian seed starch (DSS) and to characterize their water barrier, microscopic and mechanical properties. DSS films were prepared by casting with glycerol as plasticizer. Corn starch and cassava starch, commonly used in food processing, were chosen to prepare films and compare their properties to the DSS-based films. Using a second biopolymer, carboxymethyl cellulose (CMC), in the DSS based composite has been studied as a strategy to improve their important properties. Water vapor permeability and elongation values were improved significantly (p<0.05) when 5% (w/w DSS) CMC was incorporated. Therefore, preparing biodegradable films from DSS is a new alternative for using this raw material which is sometimes much cheaper than commercial starches

scholarly journals Scrap denim-PP composites as a material for new product design

2016 ◽  
Author(s):  
Jaime Francisco Gómez Gómez ◽  
Francisco Javier González Madariaga ◽  
Luis Alberto Rosa Sierra ◽  
Ruth Maribel León Morán
Keyword(s):  
Corn Starch ◽  
New Products ◽  
New Product ◽  
Raw Material ◽  
Materials Testing ◽  
Manufacturing Companies ◽  
Process Yield ◽  
Whole Process ◽  
Introductory Material ◽  
Third Stage

The growing interest of manufacturing companies to use its scraps as raw material to design and develop alternate products has led them to news ways of processing them. The present project arises from a jeans manufacturing company’s interest on making an effort to reuse its daily denim scrap to manufacture a different kind of product without diversifying its capabilities.   Some studies on denim-binder mixtures have been previously performed, amongst which binders such as corn starch and vinyl adhesives were used. In the present work some preliminary findings are shown using denim in its woven form combined with polypropylene, a common waste worldwide.   The goal of this project is based on the assessment of some of the mechanical properties from the obtained mixtures in order to determine their attributes and possible fields of application in the process of designing new products.   For that purpose, the materials’ testing was structured in four stages regarding the variables linked to the diversification of the mixes.   In the first stage a sandwich-like material was prepared, consisting of two denim skins and a polypropylene core. In the second stage a multilayered “film-stacking” material was developed. In the third stage, a combination was developed consisting of polypropylene mixed with 5% weight of shredded denim. Based on these preliminary findings and the inherent attributes of denim, the fourth stage is a first attempt to use the obtained materials to design new products. In this process an introductory material-product mapping was used in order to provide early insights and define scenarios and user profiles. The results of the whole process yield a first approach to configure future experiments using combinations of denim scrap and other thermoplastic polymers in order to use them in new product development.DOI: http://dx.doi.org/10.4995/IFDP.2016.3360

Preparation and Static Cushioning Property of Foaming Packaging Material with Hemp Haulm

2012 ◽  
Vol 200 ◽  
pp. 401-405 ◽  
Author(s):  
Jun Mu ◽  
Feng Mei Wang ◽  
De Rong Zhang
Keyword(s):  
Corn Starch ◽  
Influence Factors ◽  
Ammonium Bicarbonate ◽  
Raw Material ◽  
Major Influence ◽  
Packaging Materials ◽  
Foam Material ◽  
Hemp Fiber ◽  
Foaming Agent ◽  
Material Sources

Hemp haulm is processing residues extracted after the hemp fiber, with wide raw material sources, cheap price, light quality, good fiber shapes, good toughness, high strength and good buffer performance. In order to develop the application field of hemp stalk processing residues, cushioning packaging materials were prepared using hemp haulm as raw material with the hybrid inorganic foaming agent and corn starch adhesive by microwave foaming method. The properties including density, foam distribution and static compressive properties of this material were analyzed. The experimental results indicated that the density of hemp haulm foaming cushioning packaging materials was 0.235-0.339g/cm3, cell numbers were 14-25.5/cm2, and rebound rate was 62.2%-93.1%. The major influence factors on the properties of hemp haulm foam material were the particle size, foaming agent and adhesives, etc. Research showed while the hemp haulm diameter was small, the ratio of hemp haulm power and starch was 1:0.4 and starch with polyvinyl alcohol (PVA) was 1:0.5, the materials had good buffer performance. When the ratio of compound foaming agent(sodium bicarbonate, ammonium bicarbonate, ammonium carbonate)was 1:2:1, the material had the best cushioning properties as well as higher strength. Compared with polyethylene (EPE) and polystyrene (EPS), the hemp foam material was harder than EPS with no obvious yield point, no material collapsing and good cushioning properties. When the stress was greater than 5-15 N/cm2, the cushioning property of the hemp haulm foaming material was better than EPE, but close to EPS.

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