Wet Spinning Fibre
Chemically modified cellulose with EDTA fiber was dissolved in precooled NaOH/urea or LiOH/urea or concentrated H2SO4. Chitosan and alginate were added at different proportion and stages to enhance the properties of the regenerated cellulose fibers. Other nanoparticles such as limonite, graphene oxide, graphene quantum dot, magnetite and maghamite were added at different proportion. The cellulose solvent was spin and regenerated in non-solkvent of coagulant bath with mild H2SO4 or (NH4)2SO4 or Na2SO4. The coagulant temperature and its turbulence of the bath were controlled. The long fiber formed were dried using drum dryer or air dry or IR drying method.
INSPIRATION OF THE INVENTION
Regenerated cellulose fiber has limited applications, which are primarily used in the textile industry. Therefore, the fiber formed can also be used in the medical industry for wound dressing, drug delivery systems and smart textile for censoring purposes.
PROBLEM STATEMENT & CURRENT ISSUES
- Commercial viscose-CMC fiber has high absorbance and strong adherence of the fiber to each other in wet conditions. However, this hinders the production of this product in the typical commercial process.
- Cellulose is an ecologically friendly material that causes various microbes to grow and produces an unpleasant smell.
- Uneven distribution of metal/inorganic material in the cellulose had caused a major disadvantage for it to be used in the e-textile industry.
- Low dissolved cellulose yield by using alkali/urea solvent had increase cost for raw material of the cellulose.
INVENTIVENESS & NOVELTY
Cellulose dissolved in one-step precools dissolution process.
The addition of organic and inorganic materials is to boost the application of the product.
USEFULNESS & APPLICATION
The product can be used in the medical field, electric and electronic, wastewater treatment, etc.
- In the medical field, regenerated cellulose fiber can be used as wound dressing material. This can be applied to woven and non-woven dressing.
- Cellulose fiber can also be used for e-textile production, which increased the demand for sport wear because it is more comfortable and user-friendly.
- For wastewater treatment, woven and non-woven fiber can be used as filtration material. This filter can also be used for air and other applications
IMPACT OF THE PRODUCT
- Offer alternative use of the biomass, especially from the oil palm industry
- Diminish dependency on high-end cotton quality for high-end textile product
- A more sustainable product means a greener economic values are embarked.
Textile, wastewater treatment, wound dressing etc.
TRL : 5
- Plantation for water holding materials/fertilizer
- Sanitary and hygienist: diapers, absorbance sheets (hospital use) etc.
- Plant pot and decorations
TRL : 5
Project Leader : Prof. Dr. Sarani Zakaria
Co-Researcher : Prof. Madya Dr. Chia Chin Hua, Puan Nyak Syazwani Nyak Mazlan
Dept./Fac./Inst : Applied Physics
Expertise : Lignocellulose composite, pulp and paper, biorefinery, nanotechnology, cellulose derivatives and regenerated products, Bioresin.
Phenolic Resin-Based Fibre
Bio-novolac fibre made from phenol-formaldehyde-derived oil palm empty fruit bunch (EFB) was produced using the electrospinning method. The bio-novolac phenol-formaldehyde was prepared via liquefaction and resinification at two different molar ratios of formaldehyde to liquefied EFB (LEFB) (F:LEFB = 0.5:1 and 0.8:1). Electrospinning was applied to the bio-novolac phenol-formaldehyde (BPF) to form a smooth and thin as-spun fibre. The BPF was electrospun at 15 kV and 15 cm distance between needle and collector at a flow rate of 0.5 mL/h. At the lower molecular weight of BPF resin, beads formation was observed. The addition of poly(vinyl) butyral (Mw = 175,000 - 250,000) has improved the fibre formation with lesser beads hence produced more fibre. Polymer solution with higher molecular weight produced better quality fibre