Robust Effects of Graphene Oxide on Polyurethane/Tourmaline Nanocomposite Fiber

Abstract

The use of energy therapy including tourmaline/negative ions has gained huge popularity due to their long-standing historical evidence in improving human health and the technology development. However, the limitations of tourmaline based polyurethane fibers including the unsatisfied mechanical properties and negative ions releasing performances hind their further applications for wearable energy therapy. In this study, graphene oxide was modified within the polyurethane/tourmaline nanocomposite and then the wet-spinning method was used to prepare the fibers. As expected, the results proved that polyurethane/tourmaline/graphene oxide fiber had enhanced Young’s modulus (8.4 MPa) and tensile stain at break (335%). In addition, the number of released negative ions from polyurethane/tourmaline/graphene oxide fiber was significantly improved 17 times and 1.6 times more than that of neat polyurethane fiber and polyurethane/tourmaline fiber, respectively. Moreover, the releasing number of negative ions was significantly decreased after being applying voltage. We envision that the proposed polyurethane/tourmaline/graphene oxide fiber will provide valuable insights into the development of the wearable energy products.

Reducing High-Molecular-Weight Oligomers in Biobased Pentamethylene Diisocyanate Trimers

“…The basic building block of PU is the carbamate group, which is formed through the additional polymerization of isocyanates with diols or polyols . Owing to their excellent wear resistance, toughness, mechanical strength, corrosion resistance, and processability, − they are widely employed in various fields, including coatings, , adhesives, , fibers, , thermoplastics, , thermosetting materials, , biomimetic materials, , and nanocomposites. , Commonly used polyisocyanates include aromatic and aliphatic isocyanates, such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and hexamethylene diisocyanate (HDI), which are derived from fossil feedstocks. − However, with the increasing global demand for PU, traditional polyisocyanates are facing challenges caused by decreasing fossil resources and increasing environmental pollution. New biobased isocyanates have attracted widespread attention from researchers and industries because of their high biochar content.…”

“…1 The basic building block of PU is the carbamate group, which is formed through the additional polymerization of isocyanates with diols or polyols. 2 Owing to their excellent wear resistance, toughness, mechanical strength, corrosion resistance, and processability, 3−7 they are widely employed in various fields, including coatings, 8,9 adhesives, 10,11 fibers, 12,13 thermoplastics, 14,15 thermosetting materials, 16,17 biomimetic materials, 18,19 and nanocomposites. 20,21 Commonly used polyisocyanates include aromatic and aliphatic isocyanates, such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and hexamethylene diisocyanate (HDI), which are derived from fossil feedstocks.…”

Preparation and Performance of a Novel ZnO/TM/PET Composite Negative Ion Functional Fiber

“…At present, there are three main methods for the preparation of negative air ion textiles: (1) surface coating [9,10], (2) blending [11][12][13], and (3) copolymerization [14]. For example, Jishu Zhang et al used an ultra-fine tourmaline powder to finish their knitted cotton fabric and developed a negative ion functional knitted fabric [9].…”

“…Xinglei Zhao et al prepared polyvinylidene fluoride (PVDF) fibers containing negative ion powder (NIP) via electrostatic spinning to serve as air purification materials [11]. Yuanchi Zhang et al used graphene oxide to modify a polyurethane/tourmaline nanocomposite to prepare the fibers [12]. Zhi Chen Polymers 2024, 16, 1439 2 of 15 et al prepared a PET/Ge composite fiber with 1-3% mass fraction of inorganic germanium powder through the melt-composite-spinning method [13].…”

Effect of germanium particle size on the negative air ion release and antimicrobial performances of germanium–polyamide 6 composite fibers

“…8 The mineral stone tourmaline has received extensive attention in recent years because of its natural spontaneous and permanent NAI release that is caused by the spontaneous polarization of extranuclear electrons. [9][10][11] However, the inorganic multicomponent structure of tourmaline complicates obtaining submicron-sized particles with high purity and restricts its application.…”