FDBusiness.com

Lignin boosts properties of starch-based packaging, finds study

 Breaking News
  • 2 Sisters Food Group Sells Christmas Puddings Business to Valeo Foods 2 Sisters Food Group is selling its Matthew Walker Christmas puddings business to Valeo Foods Group, the fast-growing international ambient foods producer, for £67 million. The Matthew Walker business, based...
  • Carlsberg Gives Latest Green Fibre Bottle Update Carlsberg Group has given an update on its journey to create the world’s first ‘paper’ beer bottle made from sustainably-sourced wood fibres that is both 100% bio-based and fully recyclable....
  • Loma Launches New RUN-WET IQ4 Metal Detector Loma Systems, a leading manufacturer of high performance metal detectors, checkweighers and x-ray inspection systems for the global food and pharmaceutical industries, has introduced new RUN-WET® specification to its range...
  • Campari Group Expands Brands Portfolio Campari Group, the Italian and international drinks business, has acquired a controlling interest in Mexican super premium brands Ancho Reyes spicy liqueur and Montelobos mezcal. In 2018 the net sales...
  • Winners of the 2019 Global Bottled Water Awards The winners of the 2019 Global Bottled Water Awards were announced at an awards ceremony held at the iconic Burj Al Arab, during the 16th Global Bottled Water Congress in...

Lignin boosts properties of starch-based packaging, finds study

July 31
10:45 2013

Packaging incorporating natural biopolymers can improve the mechanical and barrier properties of starch-based films, according to a study.

Results showed packaging films produced by incorporating isolated lignin improved selected thermo-mechanical and barrier properties with reduction in water vapour permeability, and improved water resistance and seal strength.

Bhat et al said that lignin, a natural biopolymer, was extracted from oil palm black liquor waste (BLW) and sago-starch is produced from sago palm plant in Malaysia.

Preparation method

Food packaging films were prepared by casting method from sago palm starch (as film matrix with 30% w/w glycerol as plasticizer) by adding lignin isolated from oil palm black liquor waste (BLW) as a reinforcing material (1, 2, 3, 4 and 5% v/w).

The sago starch films prepared by incorporating lignin isolated from BLW were found to be comparable with the films incorporated with commercial lignin.

Due to high hydrophilic nature, packaging films produced from starch possesses poor barrier (against gas and moisture) and mechanical properties, said the researchers.

This limits their potential as basic raw materials for developing biodegradable packaging materials.

Biome Bioplastics recently partnered with the University of Warwick’s Centre for Biotechnology and Biorefining in the UK to conduct research into lignin potentially providing the foundation for a new generation of bioplastics.

Exploring the benefits

The film forming solutions were prepared by addition of a percentage of sago-starch with distilled water (4g sago starch/100 ml water) at room temperature and Glycerol was added as plasticizer at a concentration of 30% (30g glycerol/100 g sago starch).

Lignin (isolated lignin and commercial lignin) was dissolved with 90% di-methyl sulfoxide (DMSO) and incorporated into the film solution at different concentrations (1, 2, 3, 4 and 5% v/w of film forming solution.

On comparison with the control, an increase in tensile strength (TS) was recorded in films produced by incorporating isolated lignin from BLW compared to commercial lignin.

“It increased corresponding to increase in the isolated lignin from BLW at 1%, 2% and 3% with a value of 3.48 ± 0.15 megapascals (MPa), 3.76 ± 0.40 MPa and 4.20 ± 0.42 MPa, respectively,” found the researchers.

With regard to elongation at break (EB), a decrease was recorded in films produced by addition of isolated lignin from BLW (at 3, 4 and 5%).

However, no significant differences were recorded in films produced by incorporating 1% and 2% of BLW isolated lignin with the films found to be more stretchable.

Films produced by using 1% and 2% of BLW isolated lignin had higher elastic modulus (EM) values compared to control films.

Those produced by incorporating lignin from BLW at 3% showed highest improvement compared to control and all the other formulations.

Further investigations are underway to evaluate biodegradability of the films for commercial use.


Warning: count(): Parameter must be an array or an object that implements Countable in /home/fdbusiness/public_html/wp-content/themes/legatus-theme/includes/single/post-tags.php on line 5
Share

About Author

colin

colin

Related Articles

Food & Drink Business Conference & Exhibition 2016

Upcoming Events

[eventlist]

Jobs: New Product Development

find food jobs

The Magazine

F&D Business Preferred Suppliers

New Subscriber

Subscribe Here



Advertisements