Biodegradable plastics are modern environmentally friendly plastics. During the design and use period, environmental pollution problems can be eliminated, and long-term use and storage requirements can be met. Under the premise of ensuring performance, it does not contain harmful substances. In actual work, relevant work can be carried out scientifically according to different plastic degradation methods, give full play to the degradation methods of photodegradation, biodegradation and the integration of the two, gradually improve work efficiency, give full play to the positive role of modern degradation work, and meet the modern requirements. Application requirements of degradable plastics to avoid environmental pollution.
Classification and characteristics of degradable plastics
1. Types of photodegradable plastics
Some photosensitizer substances are added to the plastic, which gradually decomposes under sunlight. This decomposition formula has been applied earlier in our country, and there are many shortcomings in practical applications. For example, the degradation time of plastics will be affected by sunlight or climate change, so the degradation time cannot be completely controlled, and the work effect cannot be guaranteed.
2. Types of biodegradable plastics
Under the influence of microorganisms, plastics are broken down into low-level chemicals. In practical applications, this method has the problem of convenient storage and has a wide range of applications, such as the decomposition of packaging bags, the decomposition of medical plastics, and the decomposition of agricultural plastic films.
3. Types of light and biodegradable plastics
When light and microorganisms are coordinated with each other, only the plastic formed by degradation is produced, and it has the characteristics of the degradable and biodegradable types of light.
4. Types of water-degradable plastics
Add some water-absorbing substances to the plastic, and then put it in water for hydrolysis. This method is convenient for disinfection and can be better applied in actual work. For example, in the degradation process of medical water jackets, this method can be used to carry out related work, gradually speed up the work, and improve its safety and reliability.
The performance of degradable plastics will not change when all properties meet the requirements and long-term storage. However, after several degradable plastics were exposed to the environment for 3 months, they began to thin or lose weight, which seriously affected the quality of their services. Therefore, in the process of using degradable plastics, it is necessary to scientifically apply photodegradation and biodegradation technologies to treat them, and play an active role in environmental protection.
Intelligent compost degradation tester is widely used in quality inspection, drug inspection, scientific research, packaging, film, food, medicine, daily chemical, electronics and other industries. The equipment adopts the composting method, the sample is subjected to controlled composting conditions, and the final aerobic biological decomposition capacity and the degree of disintegration are determined by measuring the amount of carbon dioxide emitted. This method achieves the best biodegradation rate by adjusting the temperature, humidity, and oxygen concentration in the compost container.
The intelligent compost degradation tester provides a high-stability constant temperature control cycle system, a temperature and humidity measurement and control system, and a high-precision flow control system to ensure that each reactor can perform stable experiments under arbitrarily set temperature, humidity, vibration and other conditions to speed up Screening of detection conditions and optimization of reaction conditions. The 18 reactors respectively detect carbon dioxide content (and can be equipped with multiple types of sensors to expand more standard applications). The independent PLC control system captures and analyzes data in real time. The experimental results can be uploaded to the computer to achieve full-process tracking of the experiment. The medical-level three-level security authority system, with traceable data to ensure authenticity and validity, is one of the necessary equipment for inspection and testing institutions and scientific research universities to conduct research, analysis and testing on degradable materials.
