Kraft lignin ameliorates degradation resistance of starch in urea delivery biocomposites

Majeed, Zahid; Mansor, Nurlidia; Ajab, Zainab; Man, Zakaria; Sarwono, Ariyanti

doi:10.1016/j.polymertesting.2017.12.011

Cited by 10 publications

(3 citation statements)

References 15 publications

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“…Loamy sand soil samples were collected from the Titi Gentang rice field (Perak, Malaysia). Soil sampling and physicochemical properties are already described in our earlier publications [ 14 ].…”

Section: Experimental Methodsmentioning

confidence: 99%

Effect of varying thickness properties of the slow release fertilizer films on morphology, biodegradability, urea release, soil health, and plant growth

et al. 2023

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Green biomass is a renewable and biodegradable material that has the potential use to trap urea to develop a high-efficiency urea fertilizer for crops’ better performance. Current work examined the morphology, chemical composition, biodegradability, urea release, soil health, and plant growth effects of the SRF films subjected to changes in the thickness of 0.27, 0.54, and 1.03 mm. The morphology was examined by Scanning Electron Microscopy, chemical composition was analyzed by Infrared Spectroscopy, and biodegradability was assessed through evolved CO2 and CH4 quantified through Gas Chromatography. The chloroform fumigation technique was used for microbial growth assessment in the soil. The soil pH and redox potential were also measured using a specific probe. CHNS analyzer was used to calculate the total carbon and total nitrogen of the soil. A plant growth experiment was conducted on the Wheat plant (Triticum sativum). The thinner the films, the more they supported the growth and penetration of the soil’s microorganisms mainly the species of fungus possibly due to the presence of lignin in films. The fingerprint regions of the infrared spectrum of SRF films showed all films in soil changed in their chemical composition due to biodegradation but the increase in the thickness possibly provides resistance to the films’ losses. The higher thickness of the film delayed the rate and time for biodegradation and the release of methane gas in the soil. The 1.03 mm film (47% in 56 days) and 0.54 mm film (35% in 91 days) showed the slowest biodegradability as compared to the 0.27 mm film with the highest losses (60% in 35 days). The slow urea release is more affected by the increase in thickness. The Korsymer Pappas model with release exponent value of < 0.5 explained the release from the SRF films followed the quasi-fickian diffusion and also reduced the diffusion coefficient for urea. An increase in the pH and decrease in the redox potential of the soil is correlated with higher total organic content and total nitrogen in the soil in response to amending SRF films with variable thickness. Growth of the wheat plant showed the highest average plant length, leaf area index and grain per plant in response to the increase in the film’s thickness. This work developed an important knowledge to enhance the efficiency of film encapsulated urea that can better slow the urea release if the thickness is optimized.

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Section: Experimental Methodsmentioning

confidence: 99%

Effect of varying thickness properties of the slow release fertilizer films on morphology, biodegradability, urea release, soil health, and plant growth

et al. 2023

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“…Since TOL has low solubility in water, modifying it with a highly hydrophilic polymer is a logical option for increasing its water solubility. , Starch is a natural and abundant polymer available at a relatively low production cost and is the primary form of polysaccharides found in various plant species. , Starch has an exceptionally high molecular weight and many hydroxyl groups. Thus, it is an excellent candidate for modifying TOL. , However, past studies primarily focused on the physical blending of starch and lignin, − and the generation of covalently bound starch-lignin macromolecule was rarely studied. Therefore, the first objective of this work was to make water-soluble TOL-starch copolymers with a high molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Generation of Sulfonated Lignin-Starch Polymer and Its Use As a Flocculant

2023

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This paper reports the polymerization of tall oil lignin (TOL), starch, and 2-methyl-2-propene-1-sulfonic acid sodium salt (MPSA), a sulfonate-containing monomer, in a three-component system to generate flocculants for colloidal systems. By utilizing the advanced 1 H, COSY, HSQC, HSQC-TOCSY, and HMBC NMR techniques, it was confirmed that the phenolic substructures of TOL and the anhydroglucose unit of starch were covalently polymerized by the monomer to generate the three-block copolymer. The molecular weight, radius of gyration, and shape factor of the copolymers were fundamentally correlated to the structure of lignin and starch, as well as the polymerization outcomes. The deposition behavior of the copolymer, studied by a quartz crystal microbalance with dissipation (QCM-D) analysis, revealed that the copolymer with a larger molecular weight (ALS-5) deposited more and generated more compact adlayer than the copolymer with a smaller molecular weight on a solid surface. Owing to its higher charge density, molecular weight, and extended coil-like structure, ALS-5 produced larger flocs with faster sedimentation in the colloidal systems, regardless of the extent of agitation and gravitational force. The results of this work provide a new approach to preparing a lignin-starch polymer, i.e., a sustainable biomacromolecule with excellent flocculation performance in colloidal systems.

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“…5,7 Referring to some superabsorbents studies for CRF, the utilization of smectite material as a raw material for in addition to producing new technology in the field of agricultural technology could be developed. [4][5][6][7][8] Previous investigations revealed the feasibility of polymeric compound/clay composite including sodium alginate/clay composites for slow release microbial fertilizer and other agrochemicals. 9,10 In more specific kind of polymeric compound, alginate is a natural polymer has been used as matrices for some controlled release of active compounds consist of pesticide, fertilizer and herbicides by previous works.…”

Section: Introductionmentioning

confidence: 99%

Alginate-Modified Saponite and Study for Ureaslow Released Fertilizer Application

Faishol¹,

Rubiyanto²,

Chuenchom³

et al. 2019

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Preparation on polymer-modified clay of alginate-saponite composite for urea slow-released fertilizer application has been conducted. The material was prepared by intercalating alginate into saponite structure followed by composite formation using urea. Material characterization was performed by x-ray diffraction, gas sorption analysis, and Fourier-Transform Infra-Red (FTIR) spectroscopy. Swelling, diffusion and network parameters of the composite were studied. The results indicated that the increasing physicochemical character was found as identified by the increasing basal spacing d 001 of saponite as well as increasing specific surface area after intercalation and composite formation. The increasing water sorption and urea adsorption rate were obtained by the modification. Study on the effect of pH on urea desorption rate composites showed that the kinetics are fit with Ritger-Peppas, first-order desorption and Higuchi models. The higher acidity enhances the rate of urea desorption. By Ritger-Peppas model, n values of desorption kinetics at all pH variation are at the range of 0.81-0.91 The values describe that the release mechanism is controlled by the diffusion and relaxation rate and it depends on water migration and urea diffusion.

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Kraft lignin ameliorates degradation resistance of starch in urea delivery biocomposites

Cited by 10 publications

References 15 publications

Effect of varying thickness properties of the slow release fertilizer films on morphology, biodegradability, urea release, soil health, and plant growth

Effect of varying thickness properties of the slow release fertilizer films on morphology, biodegradability, urea release, soil health, and plant growth

Generation of Sulfonated Lignin-Starch Polymer and Its Use As a Flocculant

Alginate-Modified Saponite and Study for Ureaslow Released Fertilizer Application

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