What is Modified Cellulose? Uses, Health Risks

What is modified cellulose is one of the most common questions we get from our readers and this is why, this article talks about everything related to this question. This article also talks about its safety concerns and all industrial uses. 

What is Modified Cellulose?

The term "modified cellulose" describes chemical changes made primarily to the hydroxyl groups in the cellulose backbone. Each cellulose unit contains both primary and secondary hydroxyl groups, with the primary C6-hydroxyl group exhibiting higher reactivity. Shredded cheese (parmesan), ice cream, fast food (burgers), powdered drink mixes, and other commercial foods can all be thickened or creamed with cellulose that has been chemically processed from wood pulp or cotton. Modified cellulose comes in soluble and insoluble varieties. Corn cobs or stalks, soybean hulls, sugar cane stalks, oat hulls, rice hulls, wheat straws, sugar beet pulp, bamboo, jute, flax, and ramie can all be used to make cellulose.

Methylcellulose (MC), carboxymethyl cellulose (CMC), and microcrystalline cellulose (MCC) are the most frequently used modified cellulose ingredients in the food industry. Methylcellulose is made up of various cellulose ethers that are created by adding methyl groups either alone or in combination with other functional groups (such as methyl chloride and propylene oxide). Therefore, a wide variety of cellulose ethers, including simple MC and hydroxypropyl MC, are technically included in the MC classification.

The most prevalent type of cellulose ether is simple MC, which is created by replacing hydroxyl groups at the C-2, C-3, and/or C-6 positions of anhydro-d-glucose units with hydrophobic groups of methyl (CH3). A long-chain ionic polysaccharide called carboxymethyl cellulose is created by first treating cellulose with sodium hydroxide and then reacting it with monochloroacetic acid or its sodium salt (Rahman et al., 2021). Some of the naturally occurring hydroxyl groups in cellulose will be swapped out for carboxymethyl groups while creating CMC (-CH2-COOH).

Applications of Modified Cellulose:

Apart from the question of what is modified cellulose, its applications are also very important to discuss. Processed meat products with less fat are one use for modified cellulose ingredients. By stabilizing the protein gel network and interacting favorably with other parts of the processed meat system, fat structurally enhances processing yields and the general textural properties of meat products. Therefore, a potential substitute ingredient with comparable technological performance is needed to make up for a decrease in water-holding capacity and potential texture losses when fat levels are reduced. Incorporating non-meat ingredients is a common strategy for reducing fat in processed meat products.

With a great deal of potential to replace fossil-based materials that are environmentally unfriendly and detrimental to ecosystems, cellulose satisfies the requirements that offer it distinct benefits over synthetic fibers in the current global context. Since characteristics like renewability and low cost are the most crucial ones for economic success, cellulose research is mostly focused on industrial requirements in the majority of laboratories across the world. The potential of cellulose to replace materials made of fossil fuels, which are known to be bad for ecosystems, and its advantages over synthetic fibers are still being demonstrated. Among the many appealing uses of cellulose are in packaging, medical supplies, electronics, and printing. The equilibrium of hydrophilicity, along with its mechanical and optical properties, appears to be the focal point of the majority of applications.

In many different kinds of processed food products, modified cellulose ingredients like MC, CMC, and MCC have been used as low-calorie, functional additives. The ability of MC to thicken, form films, and create thermal gels that melt when cooled are key components of its functionality. According to descriptions of the substance's functionality, CMC can thicken, stabilize, and change the flow properties of hydro colloidal suspensions and aqueous solutions.

The Food and Drug Administration (FDA) states that modified cellulose gum is typically regarded as a relatively safe food additive. Despite having no nutritional value or health advantages, it can be a very helpful addition to a wide range of products. The food industry frequently uses methylcellulose (MC), carboxymethyl cellulose (CMC), and microcrystalline cellulose as modified cellulose ingredients (MCC). 

Wrapping Up:

Before we wrap the question of "what is modified cellulose", it can now be stated that it is a type of food additive made from cellulose, a natural polymer found in plant cell walls, modified cellulose gum. In a wide range of food products, including ice cream, salad dressings, and processed meats, it serves as a thickening and stabilizing agent.