Degree of crosslinked cotton cellulose with prereacted DMDHEU–AA

Chen, Jui‐Chin; Yao, Weihua; Chen, Chien‐Hsin; Chen, Cheng‐Chi

doi:10.1002/app.1996

Cited by 12 publications

(4 citation statements)

References 26 publications

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“…In Table 3, the Kjeldahl method for N -methylol resins (DMeDHEU) was used to determine the change of nitrogen content combined with the sensitized fabrics during storage, reflecting the degree of reaction between DMeDHEU and cotton fibers. 15,23 According to the established kinetic equation of the reaction and the Arrhenius formula, the relative error between the predicted value and the measured value of the sensitized fabrics stored at 20°C from 15 to 60 days was less than ±2.9%, indicating that the kinetic equation had a high degree of good reliability. The sensitized fabric had been stored at 20°C for 30 days, and the reaction degree reached 44.5%.…”

Section: Resultsmentioning

confidence: 99%

“…These methods were mostly qualitative or semi-quantitative when evaluating the degree of cross-linking between finishing agents and cotton fibers, [10][11][12][13] which resulted in low accuracy and efficiency. In addition, storage stability evaluation was performed by measuring changes in mechanical properties such as strength and wrinkle recovery angle (WRA) of the sensitized fabrics before and after storage; 14,15 the changes in of properties such as WRA and the strength of the fabric before and after storage were measured after storage for 2-3 months.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Storage Stability for Delayed-Curing Non-Iron Finishing Sensitized Fabrics via Characteristic Group and Cross-linking Reaction Kinetics

Lou

Cai²,

Sun³

et al. 2023

AATCC Journal of Research

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In delayed-curing and non-iron finishing, the sensitized fabric after low-temperature drying should have good surface planeness before curing at high temperatures, which implies that the finishing agent has not reacted with the cellulose fibers during storage; therefore, a suitable non-iron finishing agent is essential for achieving the above objectives. Meanwhile, there are currently no mature and efficient evaluation methods for the storage stability of sensitized fabrics. In this article, the content of characteristic groups of the sensitized fabrics with different storage conditions was measured. The storage time can be shortened from 30 to 6 days with high-temperature storage (40–60°C). The reaction kinetics equation was established under high-temperature storage; then using this equation to predict the cross-linking degree of sensitized fabrics during long-term storage at low temperature, the storage stability of sensitized fabrics can also be evaluated. The relative error of 2.5% between the predicted value and the measured value of the reaction degree showed the accuracy and effectiveness of the established method. This article provided a basis for the stability evaluation of the sensitized fabric and the selection of the finishing agent, finishing process, and storage conditions for the delayed-curing and non-ironing finishing process.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Storage Stability for Delayed-Curing Non-Iron Finishing Sensitized Fabrics via Characteristic Group and Cross-linking Reaction Kinetics

Lou

Cai²,

Sun³

et al. 2023

AATCC Journal of Research

View full text Add to dashboard Cite

show abstract

“…Using these two rate equations, the nitrogen content of the finished fabric after longterm storage at 20 • C and 30 • C was predicted and compared with the measured nitrogen content of the fabric, and the crosslinking degree between the 2D resin and the fabric was analyzed [31]. The calculated and measured values of the nitrogen content, and WRA after long-term storage at 20 • C and 30 • C are shown in Table 1.…”

Section: Accuracy Of the Reaction Rate Evaluation Methodsmentioning

confidence: 99%

New Method to Evaluate the Crosslinking Degree of Resin Finishing Agent with Cellulose Using Kjeldahl Method and Arrhenius Formula

Lou

Zhang²,

et al. 2021

Processes

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In anti-wrinkle finishing, the crosslinking degree of fabric is mainly determined by wrinkle recovery angle, stiffness, and viscosity, these indicators can only reflect the finishing effect from a macro perspective, which cannot reflect whether the crosslinking is sufficient, and it is difficult to quantify the crosslinking degree. In this paper, we combined the Kjeldahl method with the Arrhenius formula and proposed a method to analyze the crosslinking degree of dimethyloldihydroxyethyleneurea (two-dimensional (2D) resin) with cotton cellulose during delayed-cure finishing for the first time. The nitrogen content of completed fabrics during storage was measured by the Kjeldahl method, and the reaction rate equation of the 2D resin and cellulose under normal temperature conditions was calculated. The results show that the nitrogen content is more suitable to indicate the crosslinking degree, and the apparent activation energy was 28.271 kJ/mol and the pre-finger factor was 0.622, which indicated that the 2D resin was prone to cross-linking with cotton fabrics during storage. During long-term storage, the relative errors between the calculated and measured values of the nitrogen content were within ±5%, and the accuracy was higher than the traditional evaluation method. The stability of 2D resins during the storage of delayed-curing finishing was also analyzed through this method.

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“…Furthermore, whether there are amounts of monomeric acrylic acid in the treated wood needs to be considered. A previous study suggested that DMDHEU and acrylic acid could be used to synthesize the DMDHEU-AA products for cotton fabrics treatment, and the crosslinking between cellulose and the -COOH of the DMDHEU-AA was confirmed (Chen et al 2001). Therefore, the presence of unreacted monomers probably could be avoided.…”

Section: Sample Watermentioning

confidence: 98%

Comparison of physical-mechanical and mould-proof properties of furfurylated and DMDHEU-modified wood

Chen

2019

BioRes

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In this study, 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) and furfuryl alcohol (FA) modification catalyzed by acrylic acid were comparatively studied. The effects on physical-mechanical properties and durability against mould of Masson pine and Camphor pine wood were investigated, including weight gain rate (WPG), moisture uptake, equilibrium moisture content (EMC), anti-swelling efficiency (ASE), parallel-to-grain compressive strength (CS), modulus of rupture (MOR), and mould resistance. The wood samples modified with DMDHEU closely retained their original color and texture, whereas the color of furfurylated wood became dark brown and the texture became clearer. The WPG of DMDHEU-treated wood ranged from 17.9% to 29.3%, which was lower than that of furfurylated wood that ranged from 36.7% to 39.3%. The equilibrium moisture content of DMDHEU-modified wood was slightly higher than the untreated wood, while furfurylation decreased the EMC of wood by approximately 50% compared with the untreated wood. The dimensional stability, parallel-to-grain compressive strength, and mildew resistance of Masson pine and Camphor pine improved after both modifications noticeably. It was concluded that acrylic acid can be utilized as a catalyst to perform wood furfurylation and DMDHEU modification.

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Degree of crosslinked cotton cellulose with prereacted DMDHEU–AA

Cited by 12 publications

References 26 publications

Evaluation of Storage Stability for Delayed-Curing Non-Iron Finishing Sensitized Fabrics via Characteristic Group and Cross-linking Reaction Kinetics

Evaluation of Storage Stability for Delayed-Curing Non-Iron Finishing Sensitized Fabrics via Characteristic Group and Cross-linking Reaction Kinetics

New Method to Evaluate the Crosslinking Degree of Resin Finishing Agent with Cellulose Using Kjeldahl Method and Arrhenius Formula

Comparison of physical-mechanical and mould-proof properties of furfurylated and DMDHEU-modified wood

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