Investigation of limitations of PET enzymatic hydrolysis is very important in the recycling process; Because polyethylene terephthalate is recycled enzymatically, in these steps, we must recognize the limitations. To increase the reaction efficiency of polyethylene terephthalate recycling, we can make many changes in the reaction medium, for example, increasing the temperature. In the continuation of this PETROPROVIDERS, join us to provide you with the limitations of PET enzymatic hydrolysis

What is polyethylene terephthalate?

PET bottles production

PET bottles production

Abbreviations are usually given to polymeric materials. Polyethylene terephthalate is known by the acronym “PET” in the world. Polyethylene terephthalate is a polymer resin that is known as one of the most important polyesters in the advanced world today! It should be noted that this material has a polyester structure.

There are ester bonds between the monomers of this substance. If you do not know what a polymer is, we must say that “a polymer is a set of monomers that are bonded together using different bonds.” In this regard, you must first get acquainted with the different structures of ester bonds so that in addition to the effective production of this material, you can also recycle it well.

Pet has very interesting properties; For example, it can be used to make a variety of flexible products. One of the most important applications of polyethylene terephthalate in the industry is its use as a resistant material in the production of plastics. In addition, other features of this material are:

  • Excellent heat resistance
  • Excellent resistance to moisture
  • Good resistance to the elasticity
  • Unparalleled moldability
  • cheap price
  • Fantastic market
  • Convenient shopping
  • Various uses
  • ..

In the following, we want to introduce the types of important applications of polyethylene terephthalate in industries.

Applications of polyethylene terephthalate in the world!

PET in cars!

PET in cars!

Polyethylene terephthalate is one of the types of esters that has various applications around the world! This material is widely used in the textile industry. In addition, PET can be used in the automotive industry to produce a variety of auto parts.

It is interesting to know that in the production of durable and flexible plastics, polyethylene terephthalate can be used. This material has various applications in the plastics industry. In addition, polyethylene terephthalate can be used in the insulation industry.

It also has various applications in the aircraft industry. This material is easily molded and transformed into various shapes. The melting point of polyethylene terephthalate is more than 240 degrees Celsius; So it has a very extraordinary resistance.

It should be noted that at temperatures above 65 ° C, this material loses some of its general physical and chemical properties. But it still has its main properties!

Polyethylene terephthalate is also used to make plastic bottles. We know that plastic bottles have certain advantages over glass bottles. Therefore, the use of these materials can lead to the production of durable bottles.

Why recycle polyethylene terephthalate !?

PET in construction

PET in construction

Due to the different production of polyethylene terephthalate, this material must be recycled quickly. The introduction of polyethylene terephthalate into the environment will cause environmental pollution. We see that millions of tons of waste enter the environment every day, and the disposal of this waste requires the use of special methods in recycling.

Therefore, you should consider recycling polyethylene terephthalate as your priority! This substance is approved by the FDA, but the use of this substance can cause damage to the environment if it is not recycled well!

It should be noted that if polyethylene terephthalate is used for daily use, it will not harm human health. However, it has been reported that this substance may be slightly harmful to animal food. Of course, we know that animals do not eat these substances (!), But in any case, it is better to use these substances by following the recycling methods.

There are several methods for recycling polyethylene terephthalate. The most important and best method for PET recycling is the enzymatic method. In this method, polyethylene terephthalate materials are not burned, nor are they buried! They only enter the reaction medium and come in contact with various enzymes. In the following, we want to tell you the benefits of using this method.

Advantages of recycling polyethylene terephthalate by the enzymatic method

We said that in the enzymatic method of recycling polyethylene terephthalate, no toxic substances are produced. In general, the enzymatic method for pet recycling is very interesting! In this method, no hazardous substances will be produced. Only the various enzymes lipase, esterase, cutinase, and PETase react and convert the polymer to polyethylene terephthalate as its monomeric components.

In this process, various changes can be applied that change the reaction process. For example, some of these changes include: immobilization of polyethylene terephthalate, increase in ambient temperature, increase in temperature of enzymes, use of substrates, etc.

Despite these advantages, there are some limitations of PET enzymatic hydrolysis in using the enzymatic method to recycle polyethylene terephthalate. In the following, we want to introduce these restrictions to you.

Investigation of the most important limitations of PET enzymatic hydrolysis

As mentioned and despite all the advantages of the enzyme recycling method of polyethylene terephthalate, this also has its limitations! In these methods, the conditions must be kept constant and the necessary standards for effective recycling of polyethylene terephthalate must be maintained. In this regard, no change in reaction conditions should be made spontaneously.

It should be noted that if you can identify the enzymes used in the enzymatic recycling of polyethylene terephthalates such as PETase, lipase, cutinase, and esterase, you can increase the efficiency of the reactions. In addition, the use of these enzymes causes the hydrolysis of various polyethylene terephthalates; So you should never forget the limitations of PET enzymatic hydrolysis.

In general, four limitations of PET enzymatic hydrolysis are considered for the enzymatic recycling of polyethylene terephthalate. These restrictions include:

1. Inhibition of the reaction by mediated metabolites

Sometimes the enzymatic reactions of polyethylene terephthalate recycling are limited! This limitation may be due to the substances acting as intermediates. It should be noted that these substances are intermediate metabolites that inactivate the reaction.

In this regard, you should first have an overview of these metabolites and then start the enzymatic reaction for the decomposition of polyethylene terephthalate.

2. Limited access to active sites resulting in low catalytic circulation

Sometimes the enzyme method works well but the reaction can not be done well on an active site! In these cases, the catalytic circulation is also reduced and therefore the use of a variety of substrates can help you. This, as one of the limitations of PET enzymatic hydrolysis, must be removed quickly so that the final product does not undergo drastic changes.

3. Enzyme inactivation due to the effect of end products

Another limitation of PET enzymatic hydrolysis is the inactivation of various enzymes during the reaction. Sometimes some end products produced in the recycling process can limit or inactivate enzymes! This means that our expectations of reactions do not come true.

For this reason, you should always adhere to standards to care for the vital conditions of enzymes.

4. Kinetic instability and loss of activity at high temperatures

Sometimes, as the ambient temperature rises, our expectations of enzyme activity are dashed; Because the activity of enzymes is destroyed! In these cases, we must first increase the temperature for the enzymes by the standards.

It should be noted that in some cases, these enzymes can be made more stable. In this article, we have thoroughly investigated this factor to increase the stability of enzymes against heat.

Summary of review of limitations of PET enzymatic hydrolysis

In this article from PETROPROVIDERS, we saw the most important limitations of PET enzymatic hydrolysis. We said that using the enzymatic method to recycle polyethylene terephthalate is one of the best recycling methods. This method does not use burial or cremation; That’s why this method is healthy and has special benefits! To use the enzymatic method in PET hydrolysis, you need to know the limitations and important changes. For example, an increase in immobility or an increase in ambient temperature is some of these changes.

In general, the limitations of PET enzymatic hydrolysis are varied; Knowing these makes vaccinations more efficient and faster. In addition, recycling polyethylene terephthalate is no longer a nightmare!

What do you think about the limitations of PET enzymatic hydrolysis? Is it possible to speed up the recycling reactions of polyethylene terephthalate by removing the restrictions? How to effectively recycling PET using enzymatic methods? We are waiting for you in the comments …


What is polyethylene terephthalate?

Polyethylene terephthalate is a polyester resin that has various applications in global industries.

Why should we recycle polyethylene terephthalate?

Polyethylene terephthalate, after entering the environment, increases environmental pollution; So it is better to recycle this material.

Is it safe for me to use PET?

Yes! The FDA has approved the use of this substance for healthy people, buy it easily!

Why should we buy Iran polyethylene terephthalate !?

Purchasing Iran polyethylene terephthalate will increase the strength of the final products; This substance is cheap and healthy for humans.

What can we do to buy the best Iran polyethylene terephthalate?

To buy Iran Polyethylene terephthalate with the highest quality, contact our experts.