Influence of Nano-Silica on Solvent Absorption in Polypropylene Packaging

2011 ◽  
Vol 117-119 ◽  
pp. 1061-1066
Author(s):  
Wen Cai Xu ◽  
Dong Li Li ◽  
Ya Bo Fu ◽  
Ya Jun Wang
Keyword(s):  
Food Safety ◽  
Crystallization Behavior ◽  
Adsorption Behavior ◽  
Solubility Parameters ◽  
Nano Silica ◽  
Polypropylene Composites ◽  
Solvent Absorption ◽  
Polypropylene Films ◽  
Solvent Residue ◽  
Solvent Adsorption

In this paper, the influence of nano-silica on adsorption behavior of solvent in polypropylene packaging is reported. A principle of reducing solvent residue in polypropylene packaging was explored through analyses of changes of crystallization behavior, polarity, and solubility parameters of nano-silica /polypropylene composites. The results showed that the value of solvent residue in modified polypropylene films was reduced about 50%. Therefore nano-silica modified polypropylene films with lower solvent adsorption are in accordance with food safety.

Reactive Compatibilization in Nano-Silica Filled Polypropylene Composites

2007 ◽  
Vol 121-123 ◽  
pp. 1433-1436 ◽  
Author(s):  
Klaus Friedrich ◽  
Min Zhi Rong ◽  
Ming Qiu Zhang
Keyword(s):  
Glycidyl Methacrylate ◽  
Interfacial Adhesion ◽  
Crystallization Behavior ◽  
Filler Content ◽  
Nano Silica ◽  
Reactive Compatibilization ◽  
Polypropylene Composites ◽  
Amine Functionalized ◽  
Compatibilization Effect ◽  
Notch Impact Strength

Nano-sized silica was pre-grafted with poly(glycidyl methacrylate) (PGMA) by solution free-radical polymerization. When these grafted silica particles were melt compounded with polypropylene (PP), reactive compatibilization effect was perceived due to the chemical bonding between the PGMA and amine functionalized PP, which led to a significant increase of tensile strength and notch impact strength of PP at rather low filler content. Accordingly, compatibility of each kind of the functionalized PP with grafted SiO2 was evaluated through investigating the mechanical properties, crystallization behavior and rheological performance of the composites. The results show that the reactive compatibilization is capable of providing stronger interfacial adhesion.

A Method of Reducing Volatile Compounds in Polypropylene Packaging Materials

2011 ◽  
Vol 284-286 ◽  
pp. 2057-2063
Author(s):  
Dong Li Li ◽  
Wen Cai Xu ◽  
Ya Bo Fu
Keyword(s):  
Ethyl Acetate ◽  
Food Packaging ◽  
Food Contamination ◽  
Packaging Materials ◽  
Adsorption Behaviour ◽  
Nano Silica ◽  
Polypropylene Composites ◽  
Modification Process ◽  
Safe Food ◽  
Solvent Residue

When food contamination problems occur, one of the first priorities is adsorption to any volatile or semivolatile organic chemicals in packaging materials. In this contribution the adsorption behaviour of modified polypropylene composites containing nano-silica is reported. The nano silica can increase the polarity of PP and decrease more volatile solvent residue of ethyl acetate in CPP film. If lower volatile solvent used in print ink or adhesive, load of nano silica can decrease solvent residue too, when a lesser decrease is happen in crystallinity of modified PP. The nano modification process is able to produce more safe food packaging materials, but must consider the load of nanosilica.

A Method of Reducing Volatile Compounds in Polypropylene Packaging Materials

2011 ◽  
Vol 291-294 ◽  
pp. 1100-1105
Author(s):  
Dong Li Li ◽  
Wen Cai Xu ◽  
Ya Bo Fu
Keyword(s):  
Ethyl Acetate ◽  
Food Packaging ◽  
Food Contamination ◽  
Packaging Materials ◽  
Adsorption Behaviour ◽  
Nano Silica ◽  
Polypropylene Composites ◽  
Modification Process ◽  
Safe Food ◽  
Solvent Residue

When food contamination problems occur, one of the first priorities is adsorption to any volatile or semivolatile organic chemicals in packaging materials. In this contribution the adsorption behaviour of modified polypropylene composites containing nano-silica is reported. The nano silica can increase the polarity of PP and decrease more volatile solvent residue of ethyl acetate in CPP film. If lower volatile solvent used in print ink or adhesive, load of nano silica can decrease solvent residue too, when a lesser decrease is happen in crystallinity of modified PP. The nano modification process is able to produce more safe food packaging materials, but must consider the load of nanosilica.

Preparation of Nano-Silica/Polypropylene Composites Using Reactive Compatibilization

2006 ◽  
Vol 312 ◽  
pp. 229-232 ◽  
Author(s):  
Klaus Friedrich ◽  
Min Zhi Rong ◽  
Ming Qiu Zhang ◽  
Wen Hong Ruan
Keyword(s):  
Glycidyl Methacrylate ◽  
Interfacial Adhesion ◽  
Filler Content ◽  
Sio2 Nanoparticles ◽  
Nano Silica ◽  
Reactive Compatibilization ◽  
Polypropylene Composites ◽  
Amine Functionalized ◽  
Compatibilization Effect ◽  
Notch Impact Strength

Nano-sized silica particles were pre-grafted with poly(glycidyl methacrylate) (PGMA) by solution free-radical polymerization. When these grafted silica nanoparticles were melt compounded with polypropylene (PP), reactive compatibilization effect was perceived due to the chemical bonding between the grafted PGMA and amine functionalized PP, which led to a significant increase of tensile strength and notch impact strength of PP at rather low filler content. Accordingly, compatibility of each kind of the functionalized PP with grafted SiO2 nanoparticles was evaluated through investigating the mechanical properties, crystallization behavior and rheological performance of the composites. The results show that the reactive compatibilization is capable of providing stronger interfacial adhesion.

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