Thawien Wittaya

Prince of Songkla University · Department of Material Product Technology

The characteristics and properties of native rice starch (NRS) and hydroxypropylated rice starch (HPRS) in relation to HPRS films with 6–12% propylene oxide were investigated. The molar substitution of the resulting HPRS was in the range of 0.022–0.033. The results showed that gelatinization properties (To, Tp and Tc) and enthalpy (ΔH) of HPRS were...

In this study, the dual-modified rice starch was hydroxypropylated with 6-12% of propylene oxide followed by crosslinking with 2% sodium trimetaphosphate (STMP) and a mixture of 2% STMP and 5% sodium tripolyphosphate (STPP). Increasing the propylene oxide concentrations in the DMRS yielded an increase in the molar substitution (MS) and degree of su...

The effect of chemical crosslinking on the mechanical, thermal properties and water vapor permeability of rice starch-based films were investigated. Epichlorohydrin (EPI), Sodium trimetaphosphate (STMP) and the mixing of STMP/STPP (Sodium tripolyphosphate) were used as crosslinking agents. The viscosity of crosslinked rice starch decreased when the...

This work describes the synthesis of oil palm empty fruit bunch (OPEFB) lignin derivatives and their performance for the production of linerboard coating. OPEFB lignin derivatives were synthesized by the reactions of OPEFB lignin and soy bean oil with two proportions (OPEFB lignin: soy bean oil at 1:1 and 1:2). The formation of the derivatives was...

This paper is a report of a project to recover and evaluate the lignin obtained from the black liquor of oil palm empty fruit bunches (OPEFBs). The potential use of the recovered lignin for the production of linerboard coating was also studied. The influence of the pHs (5, 4, 3, and 2) of the black liquor on the recovery mass and the characteristic...

The properties of tapioca starch adhesives were improved by cross-linking and the cross-linked adhesive compared with pure tapioca starch and poly(vinyl alcohol) adhesives. The effect of starch ratio, type of PVOH, and adding citric acid were important factors on the cross-linked adhesives. Wood adhesives made from cross-linked PVOH/starch were pre...

Linerboard coating, using lignin extracted from oil palm empty fruit bunches (OPEFB) was prepared by mixing 5% (w/v) lignin into oxidized starch solution. The effect of the type (arabic gum, carrageenan and guar gum) and concentration (1–5%, w/w of lignin) of stabilizers on the coating characteristics and properties of coated linerboard was investi...

A rice starch based film, reinforced with starch nanocrystals (prepared by submitting native granules of rice starch to acid hydrolysis at 40 °C) was prepared by casting film-solution on leveled trays. The influence of the content of starch nanocrystals (5 to 30%) on the mechanical, thermal and structural properties of rice starch films was investi...

Rice starch biodegradable films were prepared by casting film solution on leveled trays and ultra violet (UV) irradiation for 10 min was applied. The influence of content (3%, 6% and 9 wt. %) of the photosensitizer (sodium benzoate) on the properties of rice starch films was investigated. The tensile strength and gel fraction increased but elongati...

Antibacterial activity, total phenolic compound content, beta-carotene content and antioxidant activity of low acid paste, Tom-Yum paste was evaluated before subjected to apply to white shrimp as marinade agent. It was found that Tom-Yum paste could inhibit S. aureus, E. coli 0157:H7, L. monocytogenes and P. fluorescens with clear zone's sizes of 2...

Photo-crosslinked rice starch-based biodegradable films were prepared by casting film-solution on leveled trays and ultra violet (UV) irradiation was applied for 10 minute. The effect of the content (3%, 6% and 9 wt. %)of photosensitiser (sodium benzoate) on mechanical properties, water vapor permeability (WVP) and structural properties of rice sta...

cellulose microfibre; sugarcane bagasse; eco-friendly adhesive; composite adhesives; shear strength. T he properties of eco-friendly adhesives prepared from poly(vinyl alcohol) (PVOH) can be improved by the use of cellulose microfibre (CMF). The CMF was prepared from oven dried sugarcane bagasse fibres. They were hydrolyzed with nitric acid of 10%...

Rhodotorula glutinis TISTR 5159 is oleaginous red yeast that accumulates both lipids and carotenoids. It was cultured in palm oil mill effluent (POME) with only the addition of ammonium sulfate and Tween 20 as a suitable nitrogen source and surfactant, respectively. Response surface methodology (RSM) was applied to optimize initial chemical oxygen...

Crude glycerol, a by-product of biodiesel plants, was used as the sole carbon source for concomitant production of lipids and carotenoids by oleaginous red yeast Rhodotorula glutinis TISTR 5159. The addition of ammonium sulfate as a nitrogen source and Tween 20 as a surfactant increased the accumulation of lipids and carotenoids. Among the factors...

The antimicrobial properties of wood extracts are well known; however their application to edible films is limited. In this study, the minimum bactericidal concentration (MBC) of kiam wood extract was established as 300 mg/L at which bacterial growth was completely inhibited. The antimicrobial properties of hydroxypropyl methylcellulose (HPMC) film...

The biodegradable rice starch (RS) films reinforced with different concentration of palm pressed fiber (PPF) silane treatments (10, 20, 30 and 40% glysidoxy propyltriethoxy silane/PPF) and content of treated PPF were investigated. Higher tensile strength (TS), water vapor permeability (WVP) and thermal properties of biodegradable RS films were obta...

Antimicrobial activity and the properties of edible film were studied by incorporating with encapsulated clove (Eugenia caryophyllata Thunb.) oil as a natural antibacterial agent. The minimal bactericidal concentration (MBC) of clove oil inhibited the growth of E. coli O175:H7, S. aureus and L. monocytogenes were tested in the stationary phase. The...

The antimicrobial effect against Escherichia coli O175:H7, Staphylococcus aureus and Listeria monocytogenes of edible film containing phayom wood (Shorea tolura) extract was investigated. In this study, the minimum bactericidal concentration (MBC) of phayom wood (Shorea tolura) extract was established as 300 mg/L at which bacterial growth was compl...

Acetone-butanol-ethanol (ABE) production from cassava starch was enhanced by a syntrophic co-culture of Clostridium butylicum TISTR 1032 and high amylase producing Bacillus subtilis WD 161 without anaerobic pretreatment. The production of amylase and ABE using this co-culture were respectively 16 and 6 times higher than those using the pure culture...

This study investigated the effect of lipid types (oleic acid, palm oil, and margarine) and their concentrations (0, 10, 20, 30, 40, and 50wt%) on the water vapor permeability (WVP), tensile strength (TS), percentage of elongation at break (%E), and structure of emulsified rice starch-chitosan composite film. The influence of rice starch-chitosan c...

The objectives of this study were testing the methodology involved in the recovery of water-soluble proteins from surimi wash-water (SWW) by shifting the pH and organic solvent use, and characterization of the recovered proteins. Water-soluble proteins were recovered from three successive washes in a surimi process; these were: 1.23±0.08, 0.64±0.06...

Edible films can be prepared from protein, polysaccharide and lipid materials. Among them, protein- based edible films are the most attractive. These films have impressive gas barrier properties compared with those prepared from lipids and polysaccharides. The mechanical properties of protein-based edible films are also better than those of polysac...

Rice starch films reinforced with microcrystalline cellulose from palm pressed fiber (MCPF) were prepared and characterized. The dependence of morphology and properties of rice starch films on MCPF (average length of about 0.480+0.023 μm) content in the range of 0 to 40 wt.-percent was characterized by scanning electron microscopy and the measuring...

Biodegradable blend films from rice starch–chitosan were developed by casting film-solution on leveled trays. The influence of the ratio of starch and chitosan (2:1, 1.5:1, 1:1, and 0.5:1) on the mechanical properties, water barrier properties, and miscibility of biodegradable blend films was investigated. The biodegradable blend film from rice sta...

Edible films and coatings have received considerable attention in recent years because of their advantages including use as edible packaging materials over synthetic films. This could contribute to the reduction of environmental pollution. By functioning as barriers, such edible films and coatings can feasibly reduce the complexity and thus improve...

This research investigated the factors affecting the properties of edible film prepared from mungbean protein (Vigna radiate (L.) Wilczek). The effects of pH, heating temperature and heating time of the film-solution on various film properties were determined using Response Surface Methodology (RSM). Generally, the impact of pH and heating temperat...

Edible film from water-soluble fish proteins were developed by casting film solution on leveled trays and effects of pH (9.5, 10.0 and 10.5), heating temperature (60, 70 and 80 °C), and heating time (10, 20 and 30 min) of the film solution on various film properties were determined using Response Surface Methodology (RSM). The impact of pH and heat...

Edible film made from water-soluble fish proteins present in surimi wash-water were developed based on formulation conditions explored in a previous study. Type and concentration of plasticizer significantly (p < 0.05) affected the mechanical and barrier properties of the films. Sorbitol (SOR) plasticized films were the most brittle, with the highe...

This study was conducted to investigate the effect of some process parameters on the properties of cast edible protein film produced from lizard fish muscle (Saurida undosquamis) and the effects of pH (2.5, 3.0 and 3.5), heating temperature (50, 60 and 70 o C), and heating time (10, 20 and 30 min) of the film-solution on various film properties. Th...

Thesis (Ph.D.)--Chulalongkorn University, 2003 This research was to test the methodology involved in recovery of water-soluble fish proteins in surimi wash-water by freeze-drying, shifting the pH and ethanol and development of edible films from water-soluble proteins from different recovery methods. Water-soluble fish proteins were recovered in dec...