Modified β-cyclodextrin microspheres towards the application in intumescent fire resistance and smoke-suppressing of bio-based poly(L-lactic acid)

Zhang, Xiaolei; Yang, Yunjie; Li, Meitong; Wu, Jingxuan; Zhu, Zhe; Bi, Chengliang; Xie, Yizhen; Wang, Taoyun; Sun, Yi; Yin, Jing; Xie, Zhanghua; Liu, Fude; Wang, Junsheng; Yang, Jinjun

doi:10.1016/j.ijbiomac.2023.123666

Cited by 6 publications

(3 citation statements)

References 61 publications

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“…With the increasing severity of plastic pollution, there has been a strong interest in biobased plastics from renewable resources. − Polylactic acid (PLA), a biobased polymer derived from renewable resources such as sugar beets and corn starch, is one of the most promising candidates for replacing traditional petrochemical polymers. , Due to its biodegradability, excellent biocompatibility, and mechanical properties, PLA is commonly used in this fields of biomedicine, food packaging, automotive sector, and textiles. − Unfortunately, PLA is a linear polymer with a large number of saturated alkane structures, which poses a highly flammable problem, severely limiting its application in some fields such as automotive interiors and electronics …”

Section: Introductionmentioning

confidence: 99%

Enhanced Flame Retardancy, Ultraviolet Shielding, and Preserved Mechanical Properties of Polylactic Acid with Fully Biobased Multifunctional Additives by a Green Method

Zhong,

Xu,

Niu

et al. 2024

ACS Sustainable Chem. Eng.

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Flammability, slow nucleation rates, and poor UV-shielding limit the widespread use of the bioplastic polylactic acid (PLA). Traditional functional additives usually have the disadvantages of complicated synthesis process, environmental unfriendliness, single function, etc., and after blending with PLA, it will also lead to the degradation of mechanical properties. In this work, fully biobased multifunctional additives (PN) were prepared by a simple and green aqueous phase electrostatic self-assembly method using biobased phytic acid and nicotinamide as monomers. Incorporation of only 2 wt % PN endowed PLA with the limiting oxygen index of 29.0% and the UL-94 rating of V-0, meeting the standard for flame-retardant materials. Flame-retardant mechanisms of PLA/PN composites were mainly gas phase. In addition, the UV protection factor value of PLA was increased to 90.8, showing good UV shielding ability. It was noteworthy that the incorporation of PN increased the nucleation density of PLA, thus maintaining better mechanical properties of PLA. Therefore, this work provides a green and efficient method for the large-scale preparation of fully biobased multifunctional additives, which is expected to expand the application areas of PLA.

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Section: Introductionmentioning

confidence: 99%

Enhanced Flame Retardancy, Ultraviolet Shielding, and Preserved Mechanical Properties of Polylactic Acid with Fully Biobased Multifunctional Additives by a Green Method

Zhong,

Xu,

Niu

et al. 2024

ACS Sustainable Chem. Eng.

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“…This fact means that the introduction of MCDPM, EG, and graphene can effectively inhibit the thermal degradation process of EP/SR, and this result can be confirmed by FTIR spectra with a specific temperature (Figure c,d). Furthermore, the total absorption intensity of various gaseous products has been determined in Figure e in which the characteristic peaks at 3519, 3020, and 2345 cm –1 are associated with H 2 O, hydrocarbons, and CO 2 , respectively . Especially for EP/SR-5, the generation of nonflammable gas (NH 3 ) at 941 cm –1 is also clearly detected, which can dilute the oxygen concentration and thus retard the thermal decomposition and combustion progress .…”

Section: Resultsmentioning

confidence: 97%

“…Furthermore, the total absorption intensity of various gaseous products has been determined in Figure 13e in which the characteristic peaks at 3519, 3020, and 2345 cm −1 are associated with H 2 O, hydrocarbons, and CO 2 , respectively. 62 Especially for EP/SR-5, the generation of nonflammable gas (NH 3 ) at 941 cm −1 is also clearly detected, which can dilute the oxygen concentration and thus retard the thermal decomposition and combustion progress. 63 In addition, the intensity of released CO 2 and hydrocarbons from the EP/SR and EP/SR-5 samples has also been compared in the range of 30−800 °C in Figure 13f,g.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Tang,

Gao,

et al. 2024

Langmuir

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Traditionally, many coatings were merely concentrated on settling the inherent fire protection problem of steel structures, while surface contamination and corrosion susceptibility should also be considered. Concurrently addressing these problems in fireproof efficiency and surface multifunctionality has become an issue of great significance in further expanding the application value in industrial and daily scenarios. Based on this condition, ecofriendly, graphene-based, and superhydrophobic coatings with multifunctional integration were constructed on steel via a one-step spraying method. The as-prepared coatings mainly consist of epoxy resin (EP), silicone resin (SR), a cyclodextrin-based flame retardant (MCDPM), expandable graphite (EG), and multilayered graphene (MG). The results demonstrate that the water contact angle (WCA) and water sliding angle (WSA) of asprepared coatings can reach 156.8 ± 1.6 and 5.8 ± 0.7°, respectively, revealing good water repellency and self-cleaning properties. The coatings can also exhibit adequate adaptability for various substrates including wood, polyurethane foam, and cotton fabrics. Besides, good durability and robustness of coatings have been also verified via acid/alkali immersion, outdoor exposure, O 2 /plasma etching, and linear abrasion tests. Simultaneously, the coatings can exhibit excellent anticorrosion capacity for steel materials via a double barrier effect. Most importantly, the coatings have exhibited the lowest backside temperature (234.5 °C) during fire impact tests, suggesting excellent fireproof and heat insulation performance. This fact can be ascribed to the conjunct action between the physical/chemical charring process of flame retardants and the remarkable thermal stability of graphene. Consequently, this article can be expected to further promote the development and application of multifunctional-integrated coatings for steel structures in more fields.

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Cyclodextrin-based host-guest hierarchical fire retardants: Synthesis and novel strategy to endow polylactic acid fire retardancy and UV resistance

Zhang,

Wang

et al. 2024

Carbohydrate Polymers

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Modified β-cyclodextrin microspheres towards the application in intumescent fire resistance and smoke-suppressing of bio-based poly(L-lactic acid)

Cited by 6 publications

References 61 publications

Enhanced Flame Retardancy, Ultraviolet Shielding, and Preserved Mechanical Properties of Polylactic Acid with Fully Biobased Multifunctional Additives by a Green Method

Enhanced Flame Retardancy, Ultraviolet Shielding, and Preserved Mechanical Properties of Polylactic Acid with Fully Biobased Multifunctional Additives by a Green Method

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Cyclodextrin-based host-guest hierarchical fire retardants: Synthesis and novel strategy to endow polylactic acid fire retardancy and UV resistance

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