**Compatibility**

The transformation of an active liquid into a pseudo-solid or powdered product can not only limit agglutination but also improve the mixing of incompatible compounds. Moreover, if one considers, for example, a textile application, the

**IV**

of the range of new polymer materials adapted to the different trapping techniques have made it possible to create new products and applications according to customer supply and demand or sometimes as a result of merged projects. The development of microencapsulation technology has been characterized in recent decades by rapid growth in patent applications and scientific articles, reflecting the interest of industrial and academic research in this subject. Thus, this technology has a host of potential applications in a wide range of industrial sectors, i.e., cosmetics, pharmaceutical and medical, electronic, waste treatment, printing, food, agriculture,

In the coming years, the size of the global microencapsulation market is expected to reach \$19.34 billion by 2025, with a compound annual growth rate of 13.6%. This increase is mainly driven by the food and beverage industry, where the demand for microencapsulated flavors, probiotic bacteria, and immobilized cells or enzymes will increase further. The microencapsulation markets are mainly dependent on geographical regions. In North America, for example, this technology has mainly been introduced in the pharmaceutical, food, and personal care industries, while the textile industry could also play a more critical role in the future. In Western Europe, the second largest regional market in 2017, the market is overgrowing regarding the availability of raw materials, coating technologies, and fields of application, and more specifically in the pharmaceutical and cosmetics industries. The Asia-Pacific market is expected to be one of the main growth areas, driven in particular by the rapid growth of the pharmaceutical and food industries and the

Microencapsulation is a process by which individual elements of an active substance are stored within a shell, surrounded or coated with a continuous film of polymeric or inorganic material to produce particles in the micrometer to millimeter range, for protection and/or controlled release. The particles obtained by this process are called microparticles, microcapsules, and microspheres according to their morphologies and internal structure. For particles with a size range below 1 µm, the terms nanoparticles, nanocapsules, and nanospheres are often used. When average diameters higher than 1000 µm are obtained, the term "macrocapsules" is adequate. The nomenclature used to define the different elements of the encapsulated product includes terms for the shell, i.e., wall, coating, membrane material, and for the core material, i.e., active agent, payload, or internal phase. Various compounds from different origins such as dyes, proteins, fragrances, monomers, catalysts, etc. can be encapsulated with different types of wall material, including natural polymer (gelatin, cellulose, chitosan, etc.), artificial polymer (cellulosic derivatives, etc.), and synthetic polymers (polyamide, polyester, etc.), for a loading content between

Microcapsules can exhibit a wide range of geometries and structures. The morphologies, geometries, or structures of the microcapsules depend mainly on the physicochemical characteristics of the core material and the process used to induce membrane formation. Thus, microparticles may have regular or irregular shapes, and their morphology may be described as mononuclear or core/shell structure, multinuclear or polynuclear particles, and matrix particle or microsphere. Microspheres consist of a polymeric network structure in which tiny particles of an

active substance are distributed homogeneously, whereas microcapsules or

biotechnology, chemical, textile, etc.

growth of the detergent market.

**Microencapsulation concept**

5 and 90% of the microparticles in weight.

effectiveness of a binder in fixing microcapsules on a surface depends on the compatibility of the different interfaces between the elements involved in the process, and is closely related to the individual nature and chemical structure of each component.
