Reaction-Multi Diffusion Model for Nutrient Release and Autocatalytic Degradation of PLA-Coated Controlled-Release Fertilizer

Irfan, Sayed Ameenuddin; Razali, Radzuan; KuShaari, KuZilati; Mansor, Nurlidia

doi:10.3390/polym9030111

Cited by 13 publications

(7 citation statements)

References 41 publications

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“…In the case of our research, the presence of the hydrophilic segment in the polymer molecule affected the degradation rate. Moreover, degradation of polyesters can take place by autocatalytic hydrolysis [ 36 ]. We assume that hydroxyacids, which are the products of polyester degradation, enhanced protonation of the secondary amine groups in PDMAEMA, causing the electrostatic repulsion and higher affinity of PDMAEMA arms to water molecules.…”

Section: Discussionmentioning

confidence: 99%

PDMAEMA/Polyester Miktopolymers: Synthesis via In-Out Approach, Physicochemical Characterization and Enzymatic Degradation

Kupczak¹,

Mielańczyk²,

Neugebauer³

2021

Materials

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Synthesis, physicochemical characterization, and the enzymatic degradation of the amphiphilic miktoarm star-shaped polymers is reported herein. First, star-shaped macroinitiators, based on N,N′-dimethylaminoethyl methacrylate (DMAEMA) and glycerol dimethacrylate (GDMA) ((PDMAEMA)n-PGDMA), were synthesized. Due to the presence of hydroxyl groups in the macroinitiator core, polyesters such as poly(ɛ-caprolactone) (P(ɛ-CL)), polylactide (PLA) and poly(lactide-co-glycolide) (PLGA) were synthesized using ring opening polymerization (ROP). Comprehensive degradation studies on enzymatic degradation, using a lipase from Pseudomonas cepacia, were performed. Enzymatic degradation was monitored by weight measurements and nuclear magnetic resonance spectroscopy (1H NMR). The fastest degradation rate was observed for the polymer with the lowest molecular weight. Amphiphilic miktopolymers may find application as biomaterials for long- or mid-term period drug-delivery systems.

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Section: Discussionmentioning

confidence: 99%

PDMAEMA/Polyester Miktopolymers: Synthesis via In-Out Approach, Physicochemical Characterization and Enzymatic Degradation

Kupczak¹,

Mielańczyk²,

Neugebauer³

2021

Materials

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“…68,69 Second, the amorphous phase of PLA was preferentially hydrolyzed into small molecules, and the ester groups of the small molecules were hydrolyzed to form carboxyl and hydroxyl end groups, which could undergo autocatalytic reaction. 65,70,71 PLA and GEL could undergo mutually facilitated degradation. 35 A comparison of Figure 10a,c demonstrates the promotion of PLA degradation by GEL, the A-5 was 100% completely degraded on day 9, while the P-5 was only 6.8% degraded on day 9, thus indicating that the GEL could greatly promote the degradation of PLA.…”

Section: Degradation Behaviormentioning

confidence: 99%

Properties of polylactic acid/gelatin/acetyl tributyl citrate blend materials

He,

Tao,

Luo

et al. 2024

J of Applied Polymer Sci

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The inherent brittleness and high cost of polylactic acid (PLA) hinder its further application. Developing low‐cost, flexible, and biodegradable gelatin (GEL)‐modified PLA is a way to broaden the application prospects of PLA applications. Acetyl tributyl citrate (ATBC) was added to overcome the process difficulty of PLA/GEL melt blending and toughening the blends. Maleic anhydride (MAH) grafted PLA (PLA‐g‐MAH) was prepared to improve the compatibility of the PLA/GEL/ATBC. Because of the interface, physical and chemical interaction induced by PLA‐g‐MAH, the compatibility among PLA, GEL, and ATBC was enhanced, which significantly improved the plasticizing efficiency of ATBC. Results showed that the elongation at break of the blends can be improved by 491%, 68 times higher than that of pristine PLA. Moreover, the modified blends did not break under the conditions of notch impact, which exhibited excellent toughness. The blends possessed a high degradation rate owing to the hydrophilic gelatin and PLA‐g‐MAH, significantly accelerated the degradation process of PLA. The prepared PLA/GEL/ATBC/PLA‐g‐MAH biomass blended plastics exhibited good comprehensive performance, with true sustainability and environmental friendliness.

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“…The built-in two-tailed t -distribution function, T.DIST.2T in Microsoft Excel was then employed to take the t statistic value and return the corresponding p -value. Typically, Spearman’s rank correlation coefficient with p -value less than 0.05 is said to be statistically significant, , indicating strong evidence to accept the calculated rank correlation coefficient.…”

Section: Applications and Metrics For Sensitivity Analysismentioning

confidence: 99%

Sensitivity Analysis of Multi-Criteria Decision-Making Methods for Engineering Applications

Nabavi

Wang

Rangaiah

2023

Ind. Eng. Chem. Res.

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Optimization for multiple objectives (multi-objective optimization) has attracted significant attention from academia, particularly in the last 2 decades. It provides a set of optimal solutions (known as Pareto-optimal solutions). Multi-criteria decision making (MCDM) is necessary to rank and choose one of the optimal solutions for implementation. The overall purpose of this paper is to investigate extensively the sensitivity of MCDM methods including the phenomenon of rank reversal. The research evaluates the effect of three modifications, namely, linear transformation of objectives (LTO), reciprocal objective reformulation (ROR), and removal of alternatives (RA) in the decision or objective matrix (DOM) of alternatives, on the ranking of Pareto-optimal solutions. The basic design of the study includes the use of 8 MCDM methods, 2 weighting methods (namely, entropy method and Criteria Importance Through Intercriteria Correlation, CRITIC method), and DOM datasets of 16 diverse applications from engineering. The major findings of the study are as follows. First, certain MCDM methods such as gray relational analysis (without any weights), combinative distance-based assessment (coupled with entropy weights), and simple additive weighting (coupled with entropy or CRITIC weights) are less sensitive to the three modifications in DOM for the applications studied. Second, the results show that weights calculated by the entropy method are more sensitive to LTO, ROR, and RA, compared to those by the CRITIC method. Third, ROR has the largest effect on ranking by MCDM methods for all of the applications studied. These findings are useful for the application of MCDM as well as for further research.

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Reaction-Multi Diffusion Model for Nutrient Release and Autocatalytic Degradation of PLA-Coated Controlled-Release Fertilizer

Cited by 13 publications

References 41 publications

PDMAEMA/Polyester Miktopolymers: Synthesis via In-Out Approach, Physicochemical Characterization and Enzymatic Degradation

PDMAEMA/Polyester Miktopolymers: Synthesis via In-Out Approach, Physicochemical Characterization and Enzymatic Degradation

Properties of polylactic acid/gelatin/acetyl tributyl citrate blend materials

Sensitivity Analysis of Multi-Criteria Decision-Making Methods for Engineering Applications

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