Few durable layers suppress cotton combustion due to the joint combination of layer by layer assembly and UV-curing

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 71482-71490 ◽  
Author(s):  
Federico Carosio ◽  
Jenny Alongi
Keyword(s):  
Flame Retardancy ◽  
Uv Curing ◽  
Layer By Layer ◽  
Lbl Assembly ◽  
Layer By Layer Assembly ◽  
Innovative Solutions ◽  
Layer Assembly

In the last five years, Layer by Layer (LbL) assembly has proven to be one of the most innovative solutions for conferring flame retardancy to fabrics.

Electric-field induced layer-by-layer assembly technique with single component for construction of conjugated polymer films

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58499-58503 ◽  
Author(s):  
Shiwei Wang ◽  
Zhuo Chen ◽  
Ahmad Umar ◽  
Yao Wang ◽  
Peng-gang Yin
Keyword(s):  
Electric Field ◽  
Conjugated Polymer ◽  
Multilayer Films ◽  
Single Component ◽  
Layer By Layer ◽  
Lbl Assembly ◽  
Layer By Layer Assembly ◽  
Universal Approach ◽  
Assembly Technique ◽  
Layer Assembly

Single component was used to construct conjugated polymer multilayer films by electric-field induced layer-by-layer assembly technique, which provides a universal approach for CPs and broadens the applicable scope of LBL assembly technique.

Preprogrammed Microfluidic System for Parallel Anti-reflection Coating by Layer-by-layer Assembly

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Zhenglin Li ◽  
Bongjun Yeom ◽  
Sung-Jin Kim
Keyword(s):  
Microfluidic System ◽  
Coating Process ◽  
Layer By Layer ◽  
Microfluidic Platform ◽  
Lbl Assembly ◽  
Layer By Layer Assembly ◽  
Technology Applications ◽  
Layer Assembly

Layer-by-layer (LbL) assembly is a widely used method of nanofilm coating in various technology applications; however, the coating process is typically time-consuming and labor-intensive. This study presents a microfluidic platform...

scholarly journals Layer-by-layer assembly flame-retardant and anti-dripping treatment of polyethylene terephthalate fabrics

2019 ◽  
Vol 14 ◽  
pp. 155892501987030
Author(s):  
Yinchun Fang ◽  
Xinhua Liu ◽  
Cuie Wang
Keyword(s):  
Flame Retardant ◽  
Polyethylene Terephthalate ◽  
Flame Retardancy ◽  
Alkali Treatment ◽  
Ammonium Polyphosphate ◽  
Layer By Layer ◽  
Limiting Oxygen Index ◽  
Layer By Layer Assembly ◽  
Branched Polyethylenimine ◽  
Layer Assembly

Layer-by-layer assembly is a simple and effective method which has been widely studied to improve the flame retardancy of textiles in recent years. In this article, flame-retardant and anti-dripping polyethylene terephthalate fabrics were successfully prepared by layer-by-layer assembly branched polyethylenimine and ammonium polyphosphate on their surface. The results of limiting oxygen index values and vertical burning test revealed that the flame retardancy and anti-dripping performance of polyethylene terephthalate fabrics were improved after the layer-by-layer assembly treatment; especially, the dripping phenomenon was eliminated when the number of branched polyethylenimine/ammonium polyphosphate bilayers was over 10. The influence of alkali treatment of polyethylene terephthalate fabrics before layer-by-layer assembly was also investigated. The results showed that alkali treatment of the polyethylene terephthalate fabrics would promote the combination of polyethylene terephthalate fabrics and the charged flame retardants indicating better flame retardancy. The results of thermogravimetric analysis revealed that layer-by-layer assembly treatment of polyethylene terephthalate fabrics would promote char formation both under the nitrogen atmosphere and under the air atmosphere which may act through condensed phase action. The scanning electron microscopy images of the char residues revealed that the layer-by-layer assembly treatment of polyethylene terephthalate fabrics would promote the formation of a compact and intact char residue, which was beneficial for the improvement of flame retardancy and anti-dripping performance. This research would provide the experimental basis for the effective flame retardancy and anti-dripping performance of polyethylene terephthalate fabric.

Layer-by-layer assembly of versatile nanoarchitectures with diverse dimensionality: a new perspective for rational construction of multilayer assemblies

2016 ◽  
Vol 45 (11) ◽  
pp. 3088-3121 ◽  
Author(s):  
Fang-Xing Xiao ◽  
Mario Pagliaro ◽  
Yi-Jun Xu ◽  
Bin Liu
Keyword(s):  
Layer By Layer ◽  
Future Perspectives ◽  
Lbl Assembly ◽  
Layer By Layer Assembly ◽  
Multilayer Assemblies ◽  
Rational Construction ◽  
New Perspective ◽  
Layer Assembly

Layer-by-layer (LbL) assembly of versatile nanoarchitectures with diverse dimensionality was systematically elucidated and future perspectives and challenges were discussed.

scholarly journals Ultrafast layer-by-layer assembly of PDMS for boosting the H2 separation of a P84 membrane

2021 ◽  
Author(s):  
Guozhen Li ◽  
Zhihao Si ◽  
Shuai Yang ◽  
Tanlong Xue ◽  
Jan Baeyens ◽  
...  
Keyword(s):  
Gas Separation ◽  
Uv Curing ◽  
Separation Performance ◽  
Layer By Layer ◽  
Pdms Layer ◽  
Cycle Times ◽  
Assembly Strategy ◽  
Layer By Layer Assembly ◽  
Free Membrane ◽  
Layer Assembly

BTDA-TDI/MDI (P84) has been widely applied in gas separation, however, pinholes or defects on P84 membrane surfaces were formed in the membrane preparation process and directly weaken its separation performance. Herein, we developed an ultrafast polydimethylsiloxane (PDMS) layer-by-layer assembly strategy via spraying method to heal the defects of the P84 membrane. Firstly, a very short assembly time 20-30 s was achieved by a UV-curing method. Secondly, both the PDMS spraying concentration and cycle times were optimized to strengthen the healing ability of PDMS. The P84-PDMS membrane with 3 wt % PDMS spraying concentration and 2 spraying cycle times significantly improve the H2/CH4 selectivity from 62.99 to 231.92 with a satisfactory H2 permeance (20.85 GPU). The layer-by-layer PDMS assembly strategy for healing defects of P84 membrane displays outstanding comprehensive abilities, with an easy manufacturing based upon ultrafast curing and excellent gas separation performance based on the defect-free membrane structure.

Flame behavior and mechanical properties of polyester fabrics coated with intumescent coatings via layer-by-layer assembly

2019 ◽  
Vol 89 (21-22) ◽  
pp. 4691-4701 ◽  
Author(s):  
Warunee Wattanatanom ◽  
Sireerat Charuchinda ◽  
Pranut Potiyaraj
Keyword(s):  
Mechanical Properties ◽  
Flame Retardancy ◽  
Layer By Layer ◽  
Typical Structure ◽  
Polyester Fabrics ◽  
Intumescent Coatings ◽  
Layer By Layer Assembly ◽  
Assembly Technique ◽  
Coated Fabrics ◽  
Layer Assembly

Intumescent coatings consisting of branched-polyethyleneimine (BPEI) and ammonium polyphosphate (APP) solution were successfully applied on polyester fabrics by the layer-by-layer assembly technique to enhance the flame retardant and anti-dripping properties of polyester fabrics. The surface morphology of fabrics revealed that the coatings thoroughly covered the fabrics. The assessment of the vertical burning test of thin material (UL-94 rating VTM 0) indicated that the flame retardancy of coated polyester fabrics was improved significantly as compared with the uncoated fabric. The self-extinguishing ability and anti-dripping behaviors of coated polyester fabrics were also enhanced markedly. The improvement of flame retardancy depends on the number of coating layers and the amount of APP. However, after washing, the flame retardancy decreases to some extent. The morphology of char exhibits the typical structure of intumescent char on coated fabrics. The assessment of mechanical properties revealed that the intumescent coating via layer-by-layer assembly did not deteriorate the strength of the fabric. The increasing number of coated layers leads to the slight increase of the breaking force of the fabric; however, the increasing number of layers and the increasing amount of prepared APP lead to increased rigidity of the fabrics.

Layer by layer assembly of sulfonic poly(ether sulfone) as heparin-mimicking coatings: scalable fabrication of super-hemocompatible and antibacterial membranes

2015 ◽  
Vol 3 (7) ◽  
pp. 1391-1404 ◽  
Author(s):  
Lingren Wang ◽  
Baihai Su ◽  
Chong Cheng ◽  
Lang Ma ◽  
Shuangsi Li ◽  
...  
Keyword(s):  
Polymeric Membranes ◽  
Water Soluble ◽  
Layer By Layer ◽  
Quaternized Chitosan ◽  
Lbl Assembly ◽  
Layer By Layer Assembly ◽  
Layer Assembly

In this study, super-hemocompatible and antibacterial polymeric membranes with surface coated nanofilms were fabricated by LBL assembly of water-soluble heparin-mimicking polymer and quaternized chitosan.

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