Properties of Wheat Gluten/Poly(lactic acid) Laminates

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Properties of Wheat Gluten/Poly(lactic acid) Laminates

Cho, Sung-Woo (author): Högskolan i Borås,KTH,Polymera material,Institutionen Ingenjörshögskolan

Gällstedt, Mikael (author): RISE,KTH,Innventia

Hedenqvist, Mikael S (author): RISE,KTH,Fiber- och polymerteknologi,Innventia

(creator_code:org_t)

2010-05-26
2010
English.
In: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 58:12, s. 7344-7350

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; https://urn.kb.se/re...; https://urn.kb.se/re...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Laminates of compression-molded glycerol-plasticized wheat gluten (WG) films surrounded and supported by poly(lactic acid) (PLA) films have been produced and characterized. The objective was to obtain a fully renewable high gas barrier film with sufficient mechanical integrity to function in, for example, extrusion-coating paper/board applications. It was shown that the lamination made it possible to make films with a broad range of glycerol contents (0-30 wt %) with greater strength than single unsupported WG films. The low plasticizer contents yielded laminates with very good oxygen barrier properties. In addition, whereas the unsupported WO films had an immeasurably high water vapor transmission rate (WVTR), the laminate showed values that were finite and surprisingly, in several cases, also lower than that of PLA. Besides being a mechanical support (as evidenced by bending and tensile data) and a shield between the WG and surrounding moisture, the PLA layer also prevented the loss of the glycerol plasticizer from the WG layer. This was observed after the laminate had been aged on an "absorbing" blotting paper for up to 17 weeks. The interlayer adhesion (peel strength) decreased with decreasing glycerol content and increasing WG film molding temperature (130 degrees C instead of 110 degrees C). The latter effect was probably due to a higher protein aggregation, as revealed by infrared spectroscopy. The lamination temperature (110-140 degrees C) did not, however, have a major effect on the final peel strength.

Subject headings

TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)

Keyword

Wheat gluten
poly(lactic acid)
glycerol content
laminate
oxygen permeability
water vapor transmission rate
biopolymer
GLUTEN FILMS
BARRIER PROPERTIES
SALICYLIC-ACID
PLASTICIZERS
EXTRUSION
GLYCEROL
PROTEINS
CORN
Chemical engineering
Kemiteknik

Publication and Content Type

ref (subject category)
art (subject category)

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By the author/editor: Cho, Sung-Woo; Gällstedt, Mikae ...; Hedenqvist, Mika ...

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Composite Scienc ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Polymer Chemistr ...

Articles in the publication: Journal of Agric ...

By the university: Royal Institute of Technology; RISE; University of Borås

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