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Journal articles
Magazine articles
Open Access
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
Execute! Execute! Execute!, Paper360º September/October 2021

Execute! Execute! Execute!, Paper360º September/October 2021

Journal articles
Open Access
Refining: Good practice for refining the types of fiber found in modern paper furnishes, February 1995 Tappi Journal [95Feb147.pdf]

Good practice for refining the types of fiber found in modern paper furnishes, TAPPI JOURNAL, February 1995, Vol. 78(2)

Journal articles
Open Access
Effects of fibers and fillers on the optical and mechanical characteristics of paper, TAPPI JOURNAL, February 1995, Vol. 78(2)

Effects of fibers and fillers on the optical and mechanical characteristics of paper, TAPPI JOURNAL, February 1995, Vol. 78(2)

Journal articles
Open Access
Applying enzymes and polymers to enhance the freeness of recycled fiber, TAPPI JOURNAL, February 1995, Vol. 78(2)

Applying enzymes and polymers to enhance the freeness of recycled fiber, TAPPI JOURNAL, February 1995, Vol. 78(2)

Journal articles
Open Access
Water uptake in newsprint during offset printing, TAPPI JOURNAL, January 1995, Vol. 78(1)

Water uptake in newsprint during offset printing, TAPPI JOURNAL, January 1995, Vol. 78(1)

Journal articles
Open Access
Superheated steam drying of paper: effect of sulfonation level, TAPPI JOURNAL, July 1995, Vol. 78(7)

Superheated steam drying of paper: effect of sulfonation level, TAPPI JOURNAL, July 1995, Vol. 78(7)

Journal articles
Open Access
Yankee dryer joint corrosion: cause, prevention, and repair, TAPPI JOURNAL, July 1995, Vol. 78(7)

Yankee dryer joint corrosion: cause, prevention, and repair, TAPPI JOURNAL, July 1995, Vol. 78(7)

Journal articles
Open Access
On the effect of centrifugal force on winding, TAPPI JOURNAL, July 1995, Vol. 78(7)

On the effect of centrifugal force on winding, TAPPI JOURNAL, July 1995, Vol. 78(7)

Journal articles
Open Access
Reducing chlorinated organic compounds from bleached kraft mills through first stage substitution of chlorine dioxide for chlorine, TAPPI JOURNAL, June 1995, Vol. 78(6)

Reducing chlorinated organic compounds from bleached kraft mills through first stage substitution of chlorine dioxide for chlorine, TAPPI JOURNAL, June 1995, Vol. 78(6)

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