Properties of starch‐based blend films using citric acid as additive. II

Yoon, Soon-Do; Chough, Sung-Hyo; Park, Hye-Ryoung

doi:10.1002/app.23783

Cited by 83 publications

(51 citation statements)

References 23 publications

(19 reference statements)

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“…While concentration at 0.75%, the elongation increased significantly. This result is consistent with the study of Negim et al [13] and Yoo et al [30]. The hydrolysis reaction of the glycosidic bond in starch decreased the molecular weight of the starch which could increase the mobility of the starch molecules.…”

Section: Mechanical Propertiessupporting

confidence: 93%

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Improving Properties of Arrowroot Starch (Maranta arundinacea)/PVA Blend Films by Using Citric Acid as Cross-linking Agent

Sholichah

Purwono

Nugroho

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. This research studied the effect of PVA as organic polymer and citric acid as crosslinker agent in the arrowroot starch/PVA blend films. The properties of films were investigated by water uptake, water vapor permeability, mechanical properties, thermal stability, spectra of FTIR and XRD patterns. PVA used in this research influenced the film properties at the highest concentration. The cross-linkingsinter or intra molecules of arrowroot and PVA were developed as ester bonds which are formed from the reaction of hydroxyl groups consisting of starch and PVA with citric acid. The ester bond was confirmed by FTIR spectra. The increase of the amount of citric acid affected significantly on physical, chemical and mechanical properties, water uptake, WVP and crystallinity. Water barrier level was reduced by decreasing of water uptake and WVP succeeded significantly with increased crosslinking. Cross-linking impact the thermal stability of the films. The elasticity of the films also increases the production of citric acid as a plasticizer in the making of the films as a food packaging material.

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Section: Mechanical Propertiessupporting

confidence: 93%

“…The use of citric acid as a crosslinking agent at concentrations of 0.5% and 0.75% reduced the tensile strength of the film significantly, this result is similar to [30] and [31]. The amount of citric acid used in film preparation greatly influences the mechanical properties of the film.…”

Section: Mechanical Propertiesmentioning

confidence: 68%

Improving Properties of Arrowroot Starch (Maranta arundinacea)/PVA Blend Films by Using Citric Acid as Cross-linking Agent

Sholichah

Purwono

Nugroho

2017

IOP Conf. Ser.: Earth Environ. Sci.

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“…23 Mechanical properties of the films Films were prepared with the method developed in our previous work. 24 Figures 5 and 6 show the effects of the tensile strength and elongation with the relative humidity on films containing NCS or RS4 in which GL and CA were used as additives.…”

Section: Determination Of Rs4mentioning

confidence: 99%

“…23 Starch/PVA blend film preparation Films were obtained with the casting method. 24 First, a PVA solution was prepared through the dissolution of PVA in hot water (988C). NCS, RS4, and additives (GL and CA) were mixed together with water with a Kitchen Aid mixer (Anymix, Hyunwoostar, Seoul, Korea) for 10 min.…”

Section: Preparation and Determination Of Rs4mentioning

confidence: 99%

Preparation of resistant starch/poly(vinyl alcohol) blend films with added plasticizer and crosslinking agents

Yoon

Chough

Park

2007

J of Applied Polymer Sci

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We report on the physical properties of films synthesized with native corn starch (NCS) and resistant starch (RS4) prepared with NCS. NCS and RS4/poly(-vinyl alcohol) (PVA) blend films were synthesized with a mixing process and casting method. Glycerol (GL) and citric acid (CA) were used as additives. Glutaraldehyde (GLU) was used as a crosslinking agent of the films. RS4 was synthesized with sodium trimetaphosphate and sodium tripolyphosphate as a crosslinker. Then, the RS4 thus synthesized was confirmed by the pancreatin-gravimetry method, swelling power, differential scanning calorimetry, and X-ray diffraction. The tensile strength, elongation, swelling behavior, and solubility of the films were measured. The results of the measurements indicated that the RS4-added film was better than the NCS-added film. In particular, the RS4/PVA blend film with CA as an additive showed physical properties superior to those of the other films. Also, the physical properties with GLU added as a crosslinking agent to the films were investigated. With increasing GLU contents, the tensile strength increased but the elongation, swelling behavior, and solubility values of the GL-added and CA-added films decreased.

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“…It was reported that adding citric acid decreased the strength of the starch-PVA film but provided better strength than glycerol-added starch-PVA films. The better strength of the citric acid-added starch-PVA film compared to glycerol-added starch-PVA films was attributed to the better hydrogen bonding between citric acid and starch-PVA molecules compared to glycerol and starch-PVA molecules (Yoon et al, 2006(Yoon et al, , 2007.…”

Section: Introductionmentioning

confidence: 99%