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Commercially relevant water vapor barrier properties of high amylose starch acetates: Fact or fiction?, TAPPI Journal September 2021
ABSTRACT: Starches have recently regained attention as ecofriendly barrier materials due to the increased demand for sustainable packaging. They are easily processable by conventional plastics processing equipment and have been utilized for oil and grease barrier applications. While starches have excellent oxygen barrier properties and decent water barrier properties at low relative humidity (RH), they are moisture sensitive, as demonstrated by the deterioration of the barrier properties at higher RH values. Starch esters are chemically modified starches where the hydroxyl group of the starch has been substituted by other moieties such as acetates. This imparts hydrophobicity to starches and has been claimed as a good way of retaining water vapor barrier properties of starches, even at high RH conditions. We studied the water vapor barrier properties of one class of starch esters, i.e., high amylose starch acetates that were assumed to have good water vapor barrier properties. Our investigations found that with a high degree of substitution of hydroxyl groups, the modified starches did indeed show improvements in water vapor response as compared to pure high amylose starch films; however, the barrier properties were orders of magnitude lower than commercially used water vapor barriers like polyethylene. Even though these materials had improved water vapor barrier response, high amylose starch acetates are likely unsuitable as water vapor barriers by themselves, as implied by previous literature studies and patents.
Journal articles
Magazine articles
The Creep Properties of Paper, TAPPI Journal August 2022
ABSTRACT: The creep proprties of alpha-pup handshetts were determined at various constant tensile loads and relative humidities for the purpose of clarifying the prerupture mechanical behavior of paper.
Journal articles
Environmental concerns draw crowd to conference in san anton
Environmental concerns draw crowd to conference in san antonio, TAPPI JOURNAL, July 1991, Vol. 74(7)
Journal articles
A mill survey of oxygen utilization in extraction and delign
A mill survey of oxygen utilization in extraction and delignification processes, TAPPI JOURNAL, June 1991, Vol. 74(6)
Journal articles
Control valves for stock and white water: reducing cavitatio
Control valves for stock and white water: reducing cavitation damage by specifying the correct size, TAPPI JOURNAL, June 1991, Vol. 74(6)
Magazine articles
Corrosion-resistant coatings for recovery boiler ductwork, TAPPI JOURNAL, June 1991, Vol. 74(6)
Corrosion-resistant coatings for recovery boiler ductwork, TAPPI JOURNAL, June 1991, Vol. 74(6)
Journal articles
Round-robin evaluation of thickness test methods for gray ca
Round-robin evaluation of thickness test methods for gray cast iron, TAPPI JOURNAL, March 1991, Vol. 74(3)
Journal articles
Optimizing performance in microwave-only packaging with ppo/
Optimizing performance in microwave-only packaging with ppo/hips resins, TAPPI JOURNAL, March 1991, Vol. 74(3)
Journal articles
Biological treatments as an alternative to chemical pretreat
Biological treatments as an alternative to chemical pretreatments in high-yield wood pulping, TAPPI JOURNAL, March 1991, Vol. 74(3)
Journal articles
Effect of drying conditions on the quality of wood-containing lightweight coated paper, TAPPI JOURNAL, May 1991, Vol. 74(5)
Effect of drying conditions on the quality of wood-containing lightweight coated paper, TAPPI JOURNAL, May 1991, Vol. 74(5)