Influence of Moisture Content on Starch Esterification by Solvent‐Free Method

Zhu, Jian; Lu, Kai; Liu, Hongsheng; Bao, Xianyang; Yang, Ming‐Bo; Ling, Chen

doi:10.1002/star.202100009

Cited by 11 publications

(2 citation statements)

References 34 publications

(37 reference statements)

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“…Natural starches normally contain about 13% moisture [ 18 , 29 ]. This moisture is generally stable in starch particles in different formats including bound or crystalline water or free water without heating.…”

Section: Resultsmentioning

confidence: 99%

Synergizing Multi-Plasticizers for a Starch-Based Edible Film

Alee

Yang

et al. 2022

Foods

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Synergized multi-plasticizers for a starch-based edible film were developed for food packaging. The most popular edible plasticizers, water, glycerol, and sorbitol were used as modal materials to demonstrate the synergized function of multi-plasticizers. The efficiency, stability, and compatibility of each plasticizer, as well as their synergized functions were investigated based on the characterizations of tensile properties after storing under different humidity conditions and for different times. The relationship between the microstructures of the plasticizers and their performances was studied and established. The results showed that water is an efficient plasticizer but is not stable, which results in it becoming brittle under lower humidity conditions; glycerol has a stronger moisture-retaining and absorption capability, which results in a weaker tensile strength under higher humidity conditions; and sorbitol is an efficient and stable plasticizer but needs to work with water, and its function can be synthesized by mixing it with water and glycerol.

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Section: Resultsmentioning

confidence: 99%

Synergizing Multi-Plasticizers for a Starch-Based Edible Film

Alee

Yang

et al. 2022

Foods

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“…Scientists have developed dry and semi-dry starch modification methods on this basis [20][21][22]. Zhu et al [23] investigated the effect of different starch moistures on solvent-free esterification reactions. At low water contents, the esterification reaction is difficult due to strong hydrogen bonding, whereas at too high moisture, the degree of substitution and the efficiency of the reaction decrease due to side reactions and dilution.…”

Section: Introductionmentioning

confidence: 99%

Alkaline Hydrolysis of Waste Acrylic Fibers Using the Micro-Water Method and Its Application in Drilling Fluid Gel Systems

Long,

Wei,

Zhou

et al. 2023

Gels

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Filtrate reducer is a drilling fluid additive that can effectively control the filtration loss of drilling fluid to ensure the safe and efficient exploitation of oilfields. It is the most widely used treatment agent in oilfields. Due to its moderate conditions and controllable procedure, alkaline hydrolysis of high-purity waste polyacrylonitrile has been utilized for decades to produce filtrate reducer on a large scale in oilfields. However, the issues of long hydrolysis time, high viscosity of semi-finished products, high drying cost, and tail gas pollution have constrained the development of the industry. In this study, low-purity waste acrylic fiber was first separated and purified using high-temperature hydroplastization, and the hydrolyzed product was obtained using alkaline hydrolysis with the micro-water method, which was called MW−HPAN. The hydrolysis reaction was characterized using X-ray diffraction, scanning electron microscopy, infrared spectroscopy, and thermogravimetric analysis, and the elemental analysis showed a hydrolysis degree of 73.21%. The experimental results showed that after aging at 180 °C for 16 h, the filtration volume of the freshwater base slurry with 0.30% dosage and 4% brine base slurry with 1.20% dosage was 12.7 mL and 18.5 mL, respectively. The microstructure and particle size analysis of the drilling fluid gel system showed that MW−HPAN could prevent the agglomeration of clay and maintain a reasonable particle size distribution even under the combined deteriorating effect of high temperature and inorganic cations, thus forming a dense filter cake and achieving a low filtrate volume of the drilling fluid gel system. Compared with similar commercially available products, MW−HPAN has better resistance to temperature and salt in drilling fluid gel systems, and the novel preparation method is promising to be extended to practical production.

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