Development of Waterproof Papers from Water Hyacinth Fibers Modified by Polylactide

2020 ◽  
Vol 1015 ◽  
pp. 89-93
Author(s):  
Thitipong Wutisart
Keyword(s):  
Water Absorption ◽  
Cross Section ◽  
Water Hyacinth ◽  
Barrier Properties ◽  
Hydrophobic Properties ◽  
Sem Images ◽  
Water Barrier

Paper made from water hyacinth which was modified by PLA solvent coating and the PLA content were varied for finding the most appropriate content. The SEM images of both surface and cross section were carried out for showing the interaction between the water hyacinth paper and PLA film. The water barrier properties of PLA content at 0.4 % (W/V) and 0.6 % (W/V) showed the hydrophobic properties of water hyacinth paper. The modified water hyacinth paper could resist water being indicated by water absorption which was over 90 minute/5µL in any PLA content.

The Study of Chitosan Solution Coating on Water Barrier Property of Seedling Paper Bag Made from Water Hyacinth

2021 ◽  
Vol 1047 ◽  
pp. 97-102
Author(s):  
Nattanicha Khamsao ◽  
Kornkamon Waengwan ◽  
Sunisorn Konchai ◽  
Poonnapat Patthong ◽  
Bpantamars Phadungchob ◽  
...  
Keyword(s):  
Water Hyacinth ◽  
Aquatic Plant ◽  
Water Resistance ◽  
Low Cost ◽  
Hydrophobic Surface ◽  
Chitosan Solution ◽  
Barrier Properties ◽  
Water Contact ◽  
Water Barrier ◽  
Spraying Method

Seedling bags are low cost and light weight containers used by farmers to germinate and sprout seeds into seedlings before transplanting into the ground. However, cutting and removing seedling bags before the transplantation can damage the plant roots and cause losses in their productivity. In addition, plastics used in conventional seedling bags contribute to more plastic waste during this process. This study offers a solution to these problems with alternative biodegradable materials; i.e. modified papers made from an invasive alien aquatic plant species—water hyacinth—and enhanced with Chitosan solution coating. Papers were made from water hyacinth and dipped or sprayed with Chitosan solution in acetic acid at concentrations of 1% wt., 1.5% wt., and 2% wt. The dipping method showed better water barrier properties than the spraying method in every concentration, with 2% wt. concentration having the best barrier properties. The 2% wt. concentration of Chitosan coating by dipping method changed the water contact angle of the water hyacinth paper from a hydrophilic to a hydrophobic surface. This enhancement in water resistance was confirmed by water absorption time, which reached over 1.5 hours—3 times longer than the spraying method.

Effect of DMDHEU treatment on properties of bacterial cellulose material

2021 ◽  
pp. 004051752199235
Author(s):  
Florentina Sederavičiūtė ◽  
Jurgita Domskienė ◽  
Lina Jurgelionytė ◽  
Audronė Sankauskaite ◽  
Dushan Kimmer
Keyword(s):  
Water Absorption ◽  
Bacterial Cellulose ◽  
Three Dimensional ◽  
Water Vapor Permeability ◽  
Barrier Properties ◽  
Absorption Capacity ◽  
Vapor Permeability ◽  
Crosslinking Reaction ◽  
Sem Images ◽  
Cellulose Material

The aim of this study was to estimate the influence of purification and treatment with textile finishing agent procedures on structural, mechanical, and water barrier properties of bacterial cellulose (BC) in order to predict the end-use properties. Kombucha fungus generated by Komagataeibacter xylinus species, formerly known as Gluconacetobacter xylinus, was used to produce the BC material. The BC was purified with 0.5% sodium hydroxide (NaOH) solution and treated with 5%, 10%, and 20% concentration of N, N-dimethylol 4,5-dihydroxy-ethylene urea (DMDHEU). By Fourier transform spectroscopy (FTIR) and X-ray diffractometer (XRD) was estimated, that the purification with a weak alkali solution was effective to remove amorphous matter of the BC material. Scanning electron microscope (SEM) images demonstrated the BC structure, similar to a non-woven textile fabric with clearly visible three-dimensional networks of fine cellulose fibers. After the purification process, the BC material tensile strength increased by 52%; however, the strain decreased by 93%. BC material after treatment with 20% DMDHEU regained deformability and tensile properties analogous to untreated samples. Water vapor permeability (WVP) values increased and water absorption capacity (WAC) decreased in BC material with increasing DMDHEU concentration. According to the FTIR results, the crosslinking reaction of DMDHEU and adjacent BC molecules was proved. The treatment with DMDHEU restores the amorphous properties of BC material, and therefore blocks water absorption, and the decrease in the water absorption parameter might be determined.

scholarly journals Evaluation of Coatings to Improve the Durability and Water-Barrier Properties of Corrugated Cardboard

Coatings ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 10
Author(s):  
Andrea Marinelli ◽  
Maria Vittoria Diamanti ◽  
Andrea Lucotti ◽  
Maria Pia Pedeferri ◽  
Barbara Del Curto
Keyword(s):  
Water Absorption ◽  
Surface Defects ◽  
Sol Gel ◽  
Colour Change ◽  
Barrier Properties ◽  
Contact Angles ◽  
Time Range ◽  
Water Barrier ◽  
Corrugated Cardboard ◽  
Drying Conditions

Recently, corrugated cardboard furniture gained interest from the market, yet is limited to indoor application. With an aim toward outdoor usage, water-barrier improvement of such products must be achieved. In this work, three commercially available coating grades (i.e., polymeric, mineral-filled polymeric, and hybrid silica sol-gel products) were spray-coated on corrugated cardboard using a facile, yet readily transferable, process. The investigation assessed the coating performance from the different drying conditions and natural UV-vis weathering effects, characterising their water absorption, hydrophobicity, coating morphology, and colour change. Results show a reduction in water absorption values (up to −98%) for both the polymeric coatings; instead, the hybrid sol-gel coating showed contact angles up to almost 150°. Generally, the SEM micrographs displayed some surface defects as well as good thickness homogeneity. A perceivable colour change occurred for each sample (CIEDE2000 up to 6.41), mainly occurring in the 0–100 h time range. This work provides promising results for the outdoor application of corrugated cardboard furniture.

Novel Whey Protein Isolate/Polyvinyl Biocomposite for Packaging: Improvement of Mechanical and Water Barrier Properties by Incorporation of Nano-silica

2021 ◽  
Author(s):  
Bruna Rage Baldone Lara ◽  
Paulo Sérgio de Andrade ◽  
Mario Guimarães Junior ◽  
Marali Vilela Dias ◽  
Lizzy Ayra Pereira Alcântara
Keyword(s):  
Whey Protein ◽  
Barrier Properties ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
Nano Silica ◽  
Water Barrier

Multifunctional hydrolyzed EVA membranes with tunable microstructure and water barrier properties

2015 ◽  
Vol 480 ◽  
pp. 93-103 ◽  
Author(s):  
Jorge A. Soto Puente ◽  
Kateryna Fatyeyeva ◽  
Stéphane Marais ◽  
Eric Dargent
Keyword(s):  
Barrier Properties ◽  
Water Barrier

Effect of Thickness on the Water-Barrier Properties of Silane Films

2007 ◽  
Vol 111 (42) ◽  
pp. 15325-15330 ◽  
Author(s):  
Guirong Pan ◽  
Erik Watkins ◽  
Jaroslaw Majewski ◽  
Dale W. Schaefer
Keyword(s):  
Barrier Properties ◽  
Water Barrier

scholarly journals Analysis on the barrier properties of thin film PLA/PBAT reinforced with microcrystalline cellulose

2021 ◽  
Vol 2129 (1) ◽  
pp. 012059
Author(s):  
Sitti Fatimah Mhd Ramle ◽  
Aqilah Abdul Rahim ◽  
Nur Hafizzah Jusoh ◽  
Nurul Fazita Mohammad Rawi ◽  
Che Ku Abdullah Che Ku Alam
Keyword(s):  
Thin Film ◽  
Water Absorption ◽  
Microcrystalline Cellulose ◽  
Absorption Rate ◽  
Barrier Properties ◽  
Poly Lactic Acid ◽  
Plastic Pollution ◽  
Water Absorption Rate ◽  
Environmental Friendly ◽  
Hydrolysis Process

Abstract In recent times, awareness on plastic pollution had increase which brings innovation on new productions to be environmental friendly. Various polymers has been used to analyse the suitability to produce thin films. In this study, Poly lactic acid (PLA) and Polybutylene adipate terephthalate (PBAT) reinforced with microcrystalline cellulose (MCC) were investigated. MCC were produced from selected bamboo for obtaining cellulose, then followed by an acidic hydrolysis process for the processing of microcrystalline cellulose (MCC). In this study, the thin film are focusing on the barrier properties such as water absorption, solvent resistance and absorption test. From the results shows that, the lowest rate of water absorption rate is 1.9% by 1% B-MCC/PLA/PBAT, meanwhile, the highest rate of water absorption is 60.1% by 5% C-MCC/PLA/PBAT. The water absorption rate decrease gradually with the decreasing of amount of MCC in the samples. Lastly, the thin film samples can resist with oleic acid solvents as the condition of thin film samples is still remain but they were not resistance with xylene as the thin film samples were shrinked and degraded. This thin film have a potential to replace the non-biodegradable petrochemical polymer based on their properties such as food contact, availability and cost.

Embedding Bio-Filler Materials to Enhance Physical-Mechanical-Thermal Properties of Concrete

2020 ◽  
Vol 1015 ◽  
pp. 3-8
Author(s):  
Nuchnapa Tangboriboon ◽  
Samit Niyasom
Keyword(s):  
Thermal Properties ◽  
Water Absorption ◽  
Water Hyacinth ◽  
Waste Materials ◽  
Filler Materials ◽  
Hydration Reaction ◽  
Insulation Material ◽  
Banana Fiber ◽  
The Cost ◽  
Water Hyacinth Fiber

At present, waste generation is fast-growing around the world due to the increasing of population. Therefore, recycling end-of life materials for sustainable and cleaner production is becoming a major target worldwide. The recycling waste materials is trend toward for many industries to reduce both the consumption of natural resources and the cost of products while protecting the environment from the harmful effects of waste materials. Adding water hyacinth fiber, banana fiber and eggshell powder can increase physical-mechanical-thermal properties of concrete. Concrete with/without adding 0, 0.02 and 0.05 wt% bio-filler via hydration reaction affects to good physical-mechanical-thermal properties. Especially adding 0.05 wt% eggshell powder into concrete has the highest compressive strength (22.08 ± 0.66 MPa) and lowest water absorption (1.62 ± 0.16 %) better than those of concrete without adding bio-filler. Furthermore, adding 0.05 wt% water hyacinth fiber affects to obtain the highest tensile strength equal to 187.63 ± 28.45 MPa. The obtained concrete added bio-filler samples have potential to be used as a good insulation material and building material due to low density, low water absorption, low price, good mechanical and thermal insulation.

Evaluation of mechanical and water barrier properties of transglutaminase cross-linked zein films incorporated with oleic acid

2016 ◽  
Vol 51 (5) ◽  
pp. 1159-1167 ◽  
Author(s):  
Kingsley Masamba ◽  
Yue Li ◽  
Joseph Hategekimana ◽  
Muhammad Zehadi ◽  
Jianguo Ma ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Barrier Properties ◽  
Water Barrier
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