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The detection properties of silicone rubber can be said to be between organic and inorganic substances. It contains a variety of small molecules and polymers, and the environment of food-contact silicone rubber is complex and diverse.
The food itself can be divided into water, alcohol, acid, and oil. Such steamer mats, baking mats, etc., need to be used for a long time under high temperature and high humidity environments, so it is difficult to analyze.
The analysis and detection of toxic substances in silicone rubber can be roughly divided into two ways. One is to directly and qualitatively detect the presence of toxic substances in silicone rubber materials.
For example, gas chromatography-mass spectrometry can take advantage of the high efficiency of gas chromatography and the strong qualitative power of mass spectrometry to directly detect toxic substances such as cyclosiloxane migrating from silicone rubber products.
Secondly, by analyzing the molecular structure changes of silicone rubber before and after aging, the aging mechanism can be inferred to determine the possibly toxic substances. At present, infrared spectroscopy, nuclear magnetic resonance, and other analytical methods are usually used to infer the aging mechanism of silicone rubber, simple and fast.
I. Silicone rubber test method
Gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS)
At present, GC and GC-MS have become the most commonly used qualitative and quantitative detection methods of silicone rubber for volatile cyclosiloxane in food contact silicone rubber.
The method is suitable for the separation and analysis of complex volatile components with strong chromatographic separation ability and high mass spectrometry resolution. With high separation efficiency and high sensitivity, GC-MS technology is widely used in food safety, environmental pollution, food and pesticide residue detection, and other fields.
In the process of thermal degradation of siloxane rubber, small molecules of circular siloxane were produced, and the low molecular weight circular siloxane migrated from silicone rubber products for food contact was detected by GC-MS, and methyl cyclosiloxane had the lowest single component, the detection amount was 50mg/kg.
On October 1, 2012, the implementation of “Determination of Volatile methylcyclosiloxane residues in silicone rubber” (GB/T 28112-2011) explained in detail the principle of determining the residual volatile cyclosiloxane (D4~D10) content in silicone rubber by gas chromatography.
- Silicone rubber detection method
Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR)
FTIR and NMR are important tools for analyzing the organic structure of silicone rubber materials. Among them, infrared spectroscopy is an important method to identify the composition of silicone rubber materials.
NMR can obtain information about its molecular skeleton structure, and they are widely used in the study of the microstructure of silicone rubber. Infrared spectroscopy does not require sample pretreatment, is low cost has high efficiency and has no pollution, so it is widely used in the food industry.
At present, the NMR detection of silicone rubber is mainly used in the medical field, industrial field, and biological field.
Although there are few reports on the detection of migratory toxic substances in silicone rubber that come into contact with food, foreign scholars have used nuclear magnetic resonance.
Spectroscopic detection of cyclosiloxanes with low detection limits and very specific qualitative and quantitative information.
What else can I help you with?
Silicone rubber test method?
Gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS)At present, GC and GC-MS have become the most commonly used qualitative and quantitative detection methods of silicone rubber for volatile cyclosiloxane in food contact silicone rubber.
Where can silicone rubber be purchased?
You can find silicone rubber anywhere. A trip to your local hardware store will yield the best results. But amazon carries thousands of pounds of silicone rubber on their website.
What are rubber bands made of?
They are made out of silicone rubber
How can I make things out of silicone rubber?
To make things out of silicone rubber, you can start by mixing silicone rubber with a catalyst to create a moldable material. Then, pour or shape the silicone rubber into the desired shape and allow it to cure or set. You can also use molds to create specific shapes. Once the silicone rubber has hardened, you can remove it from the mold and use it for various applications such as creating molds, seals, or custom parts.
How do you make silicon rubber?
Homemade silicone rubber is made by melting silicone until it turns into rubber form. Professionally, there are several ways to produce silicone rubber, most are a mixture of silicone, oxygen, carbon and hydrogen.
How are plastic wristbands produced?
Most plastic wristbands are created out of silicone rubber in factories, most of which are in Asia. Silicone rubber is placed into a mold, and solidifies. The mold would have the proper design which would then be passed on to the silicone rubber.
Are rubber wristbands actually made of rubber?
"Rubber wristbands are commonly made from silicone-a durable synthetic resin. Silicone is rubber-like but unlike rubber, valued for being heat-resistant and latex-free."
Is silicone the same as rubber cases?
no
Do silicone bracelets have rubber in them?
Silicone and rubber are often used interchangeably. They have a similar chemical makeup, but technically silicone is a "rubber-like" material. Natural rubber is a substance that comes from trees, so technically silicone bracelets are a "man made" form of rubber and don't have true rubber in them. I guess it just depends on how technical you want to get. You can check out Wikipedia for some details or talk to an expert who manufactures them, like MonkeyBands.com.
What glue do you use to glue silicone rubber?
Try a silicone adhesive, such as Devcon. This adhered well to a %100 soft silicone rubber part I needed to glue onto some insoles.
Do silicone coasters absorb water ie the condensation from glasses?
Typically "silicone" refers to silicone rubber which is not particularly good at absorbing moisture. In that respect, it is much like regular rubber.
What are rubber buttons in a remote control made of?
They are made of Silicone rubber.
