Facile immobilization of graphene nanosheets onto PBO fibers via MOF-mediated coagulation strategy: Multifunctional interface with self-healing and ultraviolet-resistance performance

Hot water (HW), green liquor (GL), and sodium chlorite (SC) pretreatments were used to pretreat sugarcane bagasse (SCB) and spruce (SP) and then to prepare cellulose nanofibers (CNFs) through high-pressure homogenization to explore the effect of physicochemical properties on the thermal stability and ultraviolet (UV) resistance performance of CNF films. The results indicated that the lignin content of HW-pretreated CNFs was higher than that of GL- and SC-pretreated CNFs, and the hemicellulose content of HW-pretreated CNFs was lower than that of GL- and SC-pretreated CNFs. The synergy of lignin and hemicellulose impacted the thermal stability of CNF films. The thermal stability of all the SP CNF films was higher than that of all the SCB CNF films. Hot water pretreatment improved the thermal stability of CNF films, and green liquor and sodium chlorite pretreatment decreased the thermal stability of CNF films. The highest thermal stability of SP-HW CNF films reached 392 °C, which was 5.4% higher than that of SP-SC CNF films. Furthermore, the ultraviolet resistance properties of different CNF films were as follows: SCB-HW > SCB-GL > SCB-SC and SP-HW > SP-GL > SP-SC. Green liquor pretreatment is an effective method to prepare CNFs. Conclusively, this research provides a basic theory for the preparation of CNFs and allows the improvement of CNF films in the application of thermal stability management and UV resistance fields.

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Research Progress on Ultraviolet Resistance Performance of PMIA Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.463-464.773 ◽

2012 ◽

Vol 463-464 ◽

pp. 773-776 ◽

Cited By ~ 1

Author(s):

Shao Gui Wu ◽

Jun Zhou ◽

Ya Ru Fan

Keyword(s):

Mechanical Performance ◽

Ultra Violet ◽

Research Progress ◽

Structure Stability ◽

Melt Mixing ◽

Significant Drop ◽

Ultraviolet Resistance ◽

Uv Absorbers ◽

Promising Solution ◽

Resistance Performance

In this paper, the photodegradation mechanism of PMIA under ultraviolet light is described in detail. Due to the presence of amide groups, the molecular chains are easily to be broken by exposure to ultra-violet light, which leads to the significant drop of the PMIA’s mechanical performance and meanwhile the fiber’s color becomes dark. To improve the UV resistance performance of PMIA, two methods have been discussed. The first method is melt-mixing, by adding UV absorbers to PMIA, such as benzophenone, triazine, benzotriazole and hindered anime etc. These UV absorbers consume the ultraviolet light’s energy and protect polymeric and other light-sensitive materials from degradation by sunlight or UV. The second method is adding monomers with ultraviolet resistance during the polymerization. This is a promising solution allowing better structure stability of PMIA.

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Scalable Manufactured Self-Healing Strain Sensors Based on Ion-Intercalated Graphene Nanosheets and Interfacial Coordination

ACS Applied Materials & Interfaces ◽

10.1021/acsami.9b06208 ◽

2019 ◽

Vol 11 (26) ◽

pp. 23527-23534 ◽

Cited By ~ 4

Author(s):

Yumeng Tang ◽

Quanquan Guo ◽

Zhenming Chen ◽

Xinxing Zhang ◽

Canhui Lu ◽

...

Keyword(s):

Graphene Nanosheets ◽

Strain Sensors ◽

Self Healing

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Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

Polymer Chemistry ◽

10.1039/d0py01034k ◽

2020 ◽

Vol 11 (41) ◽

pp. 6549-6558

Author(s):

Yohei Miwa ◽

Mayu Yamada ◽

Yu Shinke ◽

Shoichi Kutsumizu

Keyword(s):

Mechanical Properties ◽

Room Temperature ◽

Self Healing ◽

High Modulus ◽

Disordered Crystals ◽

Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

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