Syntheses of flame-retardant cellulose esters and their fibers

Zheng, Yunbo; Song, Jun; Cheng, Bowen; Fang, Xiaolin

doi:10.1007/s12221-016-5394-2

Cited by 12 publications

(3 citation statements)

References 44 publications

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“…As previously reported, the viscosity of the spinning dopes has a significant influence on the spinning process, and most of cellulose composite fibers were prepared by dry spray wet spinning with the concentration of spinning dope 8–12%. − The concentration of spinning dope is 10% here, so that the viscosity of the spinning dope is not too high to ensure that the spinning can be carried out smoothly. The details of the preparation of MF/cellulose flame-retardant fibers are as follows: pre-MF and cellulose (polymerization degree: 550, mass ratio: 2:1) were dissolved in EmimDEP to form spinning dopes with solid content 10% at 70 °C.…”

Section: Resultsmentioning

confidence: 97%

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Chen

Sun

et al. 2020

ACS Sustainable Chem. Eng.

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The melamine fiber has been widely used because of its excellent flame retardancy. We tried to fabricate melamine fibers using ionic liquids (ILs) as solvents, melamine formaldehyde resin prepolymer (pre-MF) as flameretardant material, and cellulose as the supporter. The best ILs for dissolving water-insoluble pre-MF were screened by COSMO-RS, in view of the richness of ILs and the complexity of pre-MF. The logarithmic activity coefficients (ln γ) of three models were calculated to evaluate the dissolution ability of pre-MF in 432 ILs. According to the results of ln γ and excess enthalpies, anions play a leading role in the dissolution process of pre-MF in ILs, while cations have little effect on it. The solubility experiments of pre-MF in 8 ILs were determined, which are consistent with the trend of ln γ predicted. It is important that the ILs composed of OAc

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Section: Resultsmentioning

confidence: 97%

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Chen

Sun

et al. 2020

ACS Sustainable Chem. Eng.

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“…But the price is expensive, for the inorganic phosphorus system flame retardant, its chemical stability is poor, and it will cause a lot of losses in the flame retardant modification [6]. Carbon point flame [7] retardant(gCDs) is a new type of flame retardant material, which is improved by introducing carbon points into the polymer. However, the single addition effect is not ideal, and it can only be added together with other flame retardant agents to get the ideal flame retardant effect.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure Analysis of Different Flame Retardant Copolymers

Feng

Liu

2023

J. Phys.: Conf. Ser.

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In this paper, through the DSC rising and cooling scanning and non-isothermal crystallization tests of different flame retardant copolymers, the crystallization process of four types of copolymers formed by adding different flame retardants such as CEPPA, DDP, Carbon-dots (gCDs), and MOF materials was studied. Also, the crystallization kinetics and crystal structure were explored. The results showed that the flame retardant effect of the flame retardant copolymer was improved after adding gCDs. The subcooling temperature (ΔTmc) values of MOF material and CEPPA were both higher than those of the DDP flame retardant copolymer after the addition of carbon dots, indicating that the introduction of the carbon-dots material made crystallisation easier. With the increase of carbon dot content, the value first increases and then decreases, indicating that the crystallization is the easiest when the content is 1%, and 1% gCDs+8% DDP has a higher crystallization ability. Pure DDP has the highest mc values, which also shows good spinnability. Also, the cooling rate strongly influences the crystallisation process, with crystallisation being more rapid when the crystallisation rate is higher. Also, the cooling rate strongly influence the crystallisation process, with crystallisation being more rapid when the crystallisation rate is higher.

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“…6. Absorbance of pyrolysis products for NC and (DMMP/CP = 8/2)/NC containing 17 wt % of DMMP/CP: a) H 2 O, b) C-H, c) CO(DMMP/CP = 8/2)/NC decomposes at lower temperature and accelerates the dehydration action, thus protecting the NC from being attacked by flames[39]. In addition, the lower release of combustion gases (Fig.6) indicates the lower heat release rate for NC, which proves the improvement of the flame retardancy of NC.…”

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confidence: 99%

Self-extinguishing low-nitrogen nitrocellulose based on synergistic effect of dimethyl methylphosphonate and long-chain chlorinated paraffin

et al. 2018

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A series of flame retardant low-nitrogen nitrocelluloses (FR/NCs) containing different weight ratios of dimethyl methylphosphonate (DMMP) and long-chain chlorinated paraffin (CP) were directly prepared by blending method, and the burning behaviors, thermal and mechanical properties, pyrolysis process and char residues were investigated. The results showed that (DMMP/CP = 8/2)/NC at a total flame retardant loading of 17 wt % displayed the self-extinguishing behavior following a multiflame retardancy mechanism with synergistic effect that includes gas-phase effects, endothermic effects and slightly condensed-phase effects of flame retardancy. In addition, the tensile properties of the (DMMP/CP = 8/2)/NC revealed a synergistic plasticization effect, which could enhance the flexibility of NC. This new system provided a reference for improving a safety storage and widely application of NC in the future.

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Syntheses of flame-retardant cellulose esters and their fibers

Cited by 12 publications

References 44 publications

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Screening Ionic Liquids for Dissolving a Melamine Formaldehyde Resin Prepolymer to Fabricate Flame-Retardant Fibers

Crystal Structure Analysis of Different Flame Retardant Copolymers

Self-extinguishing low-nitrogen nitrocellulose based on synergistic effect of dimethyl methylphosphonate and long-chain chlorinated paraffin

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