This week I would like to discuss water-based systems where the challenge is to apply the product effectively on a surface. This can be true for a high number of products ranging from coatings, adhesives, composites (for instance plastics), materials for 3D printing, deicing products and so on. The downstream processing and application of the product is by medium or high shear equipment, meaning either a roller, brush, a spray or the like. This calls for a shear thinning rheology system to stabilize the formulation and give the correct viscosity at each step.
The performance coatings sector has seen decades of development to protect installations and transportation equipment. The sector has been highly dominated by solvent based systems and these systems have seen incremental innovations for a long period of time. The end-user demands for these systems have been set in a context of a world in an ever-changing environment: high pressure on efficiency, increased globalization and international trade, as well as the period of increased climate focus. So how is this world going to look in the near future? In my attempt to share thoughts on this subject, I will focus on the rheology system, how its currently being solved and how it can be solved with alternative, more environmentally friendly technologies in the future.
Another episode of Topic Tuesday where we break down the rheological profile of cellulose fibrils under certain conditions. This week we will show you the robustness of your product's rheology profile under different temperatures when using cellulose fibrils.
We are back with another Topic Tuesday, and today's easy digestible 4 minutes of fame will introduce you to one of our favorite topics: the rheology behavior of cellulose fibrils. Jump on board, as we dig into the shear thinning properties and show you some real life examples.
Water soluble polymers have been used for decades, bringing various functionalities to a high number of applications. The reason for their popularity is the ability to being customized by changing molecular weight and molecular chain length, their high efficiency in use (especially the ones with high molecular weight), and their relatively simple handling. However, in certain cases polymeric viscosifiers fail to offer the needed performance and microfibrillated cellulose can offer exactly the desired properties.
Governments around the world are pushing industries to reduce their volatile organic compound (VOC) emissions. VOCs include very different type of chemicals but they may be dangerous to human health and therefore there is a common desire to reduce the use of them. Health effects vary from eye, nose and throat irritation to causing cancer.
Can MFC assist formulators of car care products achieve the next level of performance? Can it offer ease of use for consumers and car care professionals, while at the same time using safer, more environmentally friendly additives with a wide range of functionality? I think the answer is yes, and I will show you why.
Microfibrillated cellulose (MFC) differs from many rheology modifiers in that aspect that it can be used in high salinity formulations. The rheology effect comes from entangled fibers and salts do not influence this network as it does when the rheology effect is based on ionic interactions. However, the viscosity and other rheological properties vary slightly as a function of salt concentration. Let’s take a closer look at the reasons behind this.
Oil recovery with all different operations is a fascinating field for a rheologist since so versatile rheological properties are required in the processes. Microfibrillated cellulose has been recognized as potential green, safe rheology modifier for the oil recovery industry. Why is that?