Bio-Based Waterborne PU for Durable Textile Coatings

Abstract

Polyurethane (PU) coatings are often applied on high added value technical textiles. Key factor to success of PU coatings is its versatility and durability. Up to today most PU textile coatings are solvent-based or water-based. Recent advances are made in applying bio-based PU on textiles. Currently, polymers made from renewable raw materials are experiencing a renaissance, owing to the trend to reduce CO2 emissions, the switch to CO2-neutral renewable products and the depletion of fossil resources. However, the application of bio-based coatings on textiles is limited. The present paper discusses the potential of a bio-based anionic PU dispersion as an environment friendly alternative for petroleum-based PU in textile coating. Coatings were applied on textile via knife over roll. The chemical, thermal and mechanical properties of the bio-based PU coating were characterised via FT-IR, thermogravimetric analysis, differential scanning calorimetry and tensile test. The performance of the coating was studied by evaluating antimicrobial properties, fire retardancy, the resistance to hydrostatic pressure initially and after washing, QUV ageing and hydrolysis test. The developed bio-based PUD coating complied to the fire retardancy test ISO 15025 and exhibited excellent hydrostatic pressure, QUV ageing resistance, hydrolysis resistance, wash fastness at 40 °C.

Review of Waterproof Breathable Membranes: Preparation, Performance and Applications in the Textile Field

“…Polyurethane (PU) is a typical thermoplastic elastomer applied in hydrophilic nonporous membranes [35], which has outstanding characteristics such as high mechanical strength, thermal stability, chemical resistance, wear resistance and simple machining. However, high surface energy (40 mJ/m 2 ) [36], poor hydrophobicity and low water vapor permeability of PU provide a poor experience for wearers, thus limiting its application to a certain extent. Figure 2b [34] illustrates the process principle diagram of PU synthesis.…”

Microencapsulation of Phase Change Materials with a Soy Oil-Based Polyurethane Shell via Pickering Emulsion Polymerization

“…In this paper, we innovatively synthesize a PU shell from biobased soy polyol. In addition to having an abundant supply and being affordable as vegetable oil, soybean oil is also a sustainable, environmentally beneficial, and renewable resource. , Moreover, in this investigation, the Stober approach was used to generate monodisperse SiO 2 nanoparticles at first, and then the SiO 2 particles were modified. Finally, modified SiO 2 nanoparticles were used as emulsion stabilizers, and a PU shell was used to encapsulate the PCM ethyl palmitate for the successful fabrication of microcapsules.…”

Preparation and characterization of soy polyols‐based PU shell microencapsulated phase change materials for reliable thermal energy storage

“…Vegetable oil, including castor oil and soy oil, is a renewable resource with abundant supplies, low toxicity, and low cost, and has emerged as one of the most promising raw ingredients for the creation of bio-based PU. 44 For example, Chen et al 45 successfully prepared bio-based PU by using modified-castor oil as polyols. Cifarelli et al 46 prepared bio-polyols by using epoxidized soybean and linseed oils as raw materials, and then produced water-blown PU foams with excellent mechanical properties.…”

“…The development of environmentally friendly MEPCMs with bio‐based PU shells is critically important and useful. Vegetable oil, including castor oil and soy oil, is a renewable resource with abundant supplies, low toxicity, and low cost, and has emerged as one of the most promising raw ingredients for the creation of bio‐based PU 44 . For example, Chen et al 45 successfully prepared bio‐based PU by using modified‐castor oil as polyols.…”