PAPERmaking! FROM THE PUBLISHERS OF PAPER TECHNOLOGY Volume 5, Number 1, 2019
STARCH Modification of retrogradation property of rice starch by improved extrusion cooking technology, Yunfei Liu et al, Carbohydrate Polymers , Vol.213. Modifications of molecular structure, and of short- and long-term retrogradation properties, in rice starch by an “improved extrusion cooking technology” (IECT ) were studied. These results show that, under appropriate conditions, IECT is a type of extrusion which can be used to change retrogradation properties of rice starch that have not been previously available. Effect of Octenylsuccinylation of Oxidized Cassava Starch on Grease Resistance and Waterproofing of Food Wrapping Paper, Li Zhong et al, Starch - Stärke , No.1-2, 2019. The surface of food wrapping paper is coated with octenylsuccinic anhydride (OSA) Ǧ modified cassava starch to develop food packaging with high waterproofing and low grease permeability. Oxidised cassava starch is modified using various concentrations of OSA. The effects of OSA concentration, starch content, incubation time, and coating rate on oil resistance and hydrophobicity, grease and water barrier properties are quantified. The influence of octenylsuccinylation of oxidised cassava starch on the optical and physical properties of paper is also investigated. TESTING Maximum Vibration Transmissibility of Paper Honeycomb Sandwich Structures, Rui Yang et al, International Journal of Structural Stability and Dynamics , Online. The maximum vibration transmissibility of paper honeycomb sandwich structures with different sizes of honeycomb core under various static stresses was investigated using the sine frequency sweep test. The effects of the cell length of the honeycomb, the thickness of the sandwich structure, and the static stress on the maximum vibration transmissibility were evaluated. Test method for enhanced mechanical shock fragility statistics accuracy, Shogo Horiguchi & Katsuhiko Saito, Packaging Technology and Science , Vol.30 (4). An optimum cushioning package, which is neither excessive nor inadequate, must be designed to ensure cushioning performance that maintains an acceptable failure rate during transportation while also minimising packaging costs. For this purpose, statistics pertaining to transport hazards and product shock strength must be engaged. The proposed study presents a test method to enhance the statistical accuracy of mechanical shock fragility of products. An example of the application of experimental results to stress Ǧ strength models has also been described. WASTE TREATMENT Preparation of geopolymer inorganic membrane and purification of pulp- papermaking green liquor, M Xu et al, Applied Clay Science , Vol.168. This paper describes a low-cost and highly efficient metakaolin-based geopolymer composite membrane (support + dense layer) at normal pressure and <70 °C. The support was fabricated using geopolymer foam materials and shows a large water flux and good mechanical properties. The dense layer was prepared using a dip-coating process with geopolymer paste on the porous geopolymer support surface. The preliminary ultra- filtration test (0.2 MPa operation pressure) demonstrates that the geopolymer -based composite membrane can effectively treat suspended particles in wastewater and is expected to be applied in the field of wastewater treatment. We then used the composite membrane in the pulp-papermaking green liquor at different temperatures, and it was found that the SS (suspended solids) of the filtrate can be decreased to far below the industrial requirements of green liquor recycling (SS < 20 mg·L−1).
Technical Abstracts
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