Nanocellulose: a revolutionary material in green packaging

At a critical juncture in the packaging industry's transition to low-carbon and degradable packaging, nanocellulose has become the core breakthrough to solve the industry's pain points by virtue of its natural properties and extraordinary performance at the microscopic scale. It has the advantages of high strength, high barrier, and full degradation. There is no need to choose between environmental protection and practicality, and it is promoting the green packaging industry to achieve a qualitative leap. Among them, Nanjing Tianlu Nano Technology Co., Ltd. is deeply involved in this field, focusing on the research and development, production and sales of nanocellulose. It uses mature technology and large-scale production capacity to help its industrialization and application upgrade in the field of green packaging.

1. Core characteristics of nanocellulose

Nanocellulose is a nanoscale fiber aggregate separated from natural plant raw materials such as wood and straw through chemical hydrolysis, mechanical grinding and other processes. It mainly includes cellulose nanocrystals ( CNC ) and cellulose nanofibrils ( CNF ). Its core characteristics perfectly meet the needs of packaging materials:

• Ultra-high mechanical properties : Young's modulus can reach 140GPa , and the strength is close to steel. A small amount of addition can significantly improve the toughness and pressure resistance of packaging materials, solving the ' easy breakage ' pain point of traditional degradable materials.

• Excellent barrier capability : The nano-network structure forms a dense barrier, and the oxygen transmission rate is only 1/10 of traditional plastics . It can effectively block oxygen, moisture and grease, ensuring food preservation and item protection.

• Completely biodegradable : Originating from nature and returning to nature, it can be completely degraded 30in the soil with no environmental residue, fundamentally solving the problem of white pollution.

• Easy functional modification : The surface is rich in hydroxyl groups and can be grafted with antibacterial agents and other ingredients to achieve composite functions such as antibacterial and fresh-keeping, adapting to packaging needs in multiple scenarios.

2. Core applications in the field of green packaging

(1) Food preservation packaging: building a food safety ' protective wall '

The core of food packaging is preservation and safety. Nanocellulose-based packaging materials can significantly extend the shelf life of food through multiple protections and take into account environmental protection, making it the preferred solution.

High barrier film is its core application. It can be made into an independent film or coating to form a dense ' nano labyrinth ' . Its oxygen barrier performance is more than 90% higher than that of traditional polyethylene film , which can effectively extend the shelf life of bananas, fresh meat and other foods and reduce losses.

By loading antibacterial ingredients such as chitosan and nanosilver, nanocellulose can prepare antibacterial packaging with an antibacterial rate of over 99% and can inhibit the growth of harmful microorganisms. It is widely used in various types of food packaging, taking into account safety and environmental protection.

The biodegradable lunch boxes made of composite materials can withstand temperatures up to 120°C , can be microwaved, and degrade quickly after use. They are the perfect replacement for disposable plastic lunch boxes and solve the problem of take-out packaging pollution.

(2) Logistics and industrial packaging: creating lightweight ' strong armor '

Express delivery and industrial packaging need to take into account strength, lightweight and cost. Nanocellulose serves as a reinforcing agent to promote the transformation of paper-based packaging into ' low carbon, efficient and durable ' .

Adding to paper pulp can increase the compressive strength of the carton 5% nanocellulose by 40% , enhance the interlayer bonding force by 36% , and reduce the weight by 20% , reducing transportation damage rate and cost, and adapting to high-end packaging needs.

The hydrophobically modified nanocellulose coating can reduce the water vapor transmission rate of the carton by 36% , improve moisture-proof and wear-resistant properties, and adapt to complex transportation scenarios.

Nanocellulose airgel is lightweight, highly elastic and fully degradable. It can replace foam plastics and be used for cushioning filling of electronic products and other products to achieve ' plastic-free cushioning '。

(3) Intelligent packaging: empowering packaging ' perception capabilities '

With the intelligent upgrade of the packaging industry, nanocellulose can be loaded with pH indicators, temperature-sensitive materials, etc., and made into intelligent sensor packaging, which can change color according to the freshness of food, while achieving anti-counterfeiting and traceability, increasing the added value of packaging.

3. Industrialization Challenges and Future Prospects

At present, there are still challenges in the large-scale application of nanocellulose : high production costs, immature large-scale production technology, and reduced barrier properties in high-humidity environments, which require further modification and optimization.

In the future, nanocellulose packaging will break through bottlenecks and achieve large-scale development: as raw materials, agricultural and forestry wastes will be used to reduce costs, which is consistent with Nanjing Tianlu's concept of using green raw materials such as corn straw; technically, it will be combined with bio-based materials, and Nanjing Tianlu has launched multiple models of adapted products with its independent modification patents; in terms of scenarios, it will extend to many fields. Nanjing Tianlu is promoting its widespread application through industry-university-research cooperation and production capacity improvement to help the industry upgrade.

Nanocellulose has solved the dilemma of ' environmental protection and performance cannot have both ' in the packaging industry . As the technology matures and the industry advances, it will become the mainstream of the future packaging market and inject power into the low-carbon transformation of the global packaging industry.