Abstract
The speed of liquid planar transmission plays a key role in engineering applications, including baby wipes, wound dressings, and liquid filtration. This article reported a novel branched nonwoven consisting of melt-blown polyethylene glycol/polypropylene micro- and nanofibers. The formation mechanism of branched structures as well as the liquid planar transmission properties of the prepared polyethylene glycol/polypropylene micro-nanofibrous nonwovens was discussed in detail. The results showed that the diameter of melt-blown fibers could be controlled by changing the percentage of polyethylene glycol (0–15 wt%) and die temperature (230°C–250°C). Furthermore, micro- and nanofibers, which had three types of size: >2 μm, 800 nm–2 μm, and <800 nm, formed a three-level branched network, which greatly improved the liquid planar transmission capacity. This work suggested that the branched micro/nanofiber nonwovens could be employed in a wide range of potential engineering applications.
Highlights
Liquid planar transmission exists in industrial nonwovens, such as baby wipes, wound dressings, and liquid filtration.[1,2,3,4,5] And the speed of liquid planar transmission is a crucial factor that affects the properties and value of nonwoven products
The branched networks of the polyethylene glycol (PEG)/PP micro-nanofiber nonwovens were produced in one step by controlling the ratio of PEG in the blend and other process parameters
The fiber diameter distribution could be adjusted by the PEG percentage and the die template
Summary
Liquid planar transmission exists in industrial nonwovens, such as baby wipes, wound dressings, and liquid filtration.[1,2,3,4,5] And the speed of liquid planar transmission is a crucial factor that affects the properties and value of nonwoven products. Wang et al.[28] prepared the melt-blown nanofiber nonwovens of blended polymer with sulfopolyester and polybutylene terephthalate. It is possible to prepare micro-nanofiber nonwovens with a wide fiber diameter distribution by melt blowing a variety of noncompatible thermoplastic polymers with great viscosity difference. It is still a great challenge to realize the branched structure in micro-nanofiber nonwovens with the usage of a conventional melt-blowing process. Polyethylene glycol/polypropylene (PEG/PP) micro-nanofiber nonwovens with wide diameter distributions were successfully fabricated by the meltblowing process for fast water planar transmission. The samples were dried at 50°C after hydrophilic finishing (finishing agent in 1 wt%) Connector temperature (°C) Air temperature (°C) Air pressure (MPa) Collector speed (m/min) Die temperature (°C) Die hole diameter (mm) Air passage (mm) Metering pump frequency (Hz) Collector-to-die distance (mm)
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