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MATERIALS & DESIGN · 2016 · IF 3.997

Recyclable liquid-like POSS derivatives with designed structures and their potential for CO2 capture

Haipeng Bai,Yaping Zheng,Ruilu Yang

Six kinds of liquid-like trisilanol isobutyl-POSS derivatives are designed and synthesized to study the influences of their structures on capturing CO 2 . The derivatives are different in bonding types, NH content, flow ability, grafting ratio or molecular size. The CO 2 capture property of these derivatives is tested. It is found that bonding types can affect the recycle property, NH content can affect the chemical absorption , molecular size can affect the physical adsorption, and flow ability can affect both chemical absorption and physical adsorption. Furthermore, the physical adsorption is determining factor that cause differences from liquid-like derivatives to traditional amine based solvents CO 2 absorbents.

CAS / MDL: 919-30-2

研究领域: 材料科学 · 环境科学

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RSC Advances · 2017 ·Vol. 7 ·期 73 ·46139-46147 · IF 3.108

Highly transparent and flame-retardant epoxy composites based on a hybrid multi-element containing POSS derivative

Cheng Liu,Ting Chen,Conghui Yuan,Ying Chang,Guorong Chen,Birong Zeng,Yiting Xu,Weiang Luo,Lizong Dai

The development of a multi-element synergistic flame-retardant depends largely on the design and synthesis of flame-retardants comprising a mixture of elements such as P, N and Si. Herein, we prepare a novel POSS derivative named octa-(N,N-(bis-(9,10-dihydro-9-oxa-10-phosphaphenanthene-10-yl)methyl)aminopropyl) silsesquioxane (ODMAS) that features a high content of P. The chemical structure of ODMAS was confirmed by FT-IR, 1H NMR, 29Si NMR, 31P NMR and elemental analysis. Because of the excellent compatibility between ODMAS and epoxy resin, the as-prepared ODMAS/EP composites are highly transparent as well as possessing improved flame-retardancy and mechanical properties. The results show that the LOI value reaches 37.1% with a low phosphorus content (1.6 wt%), samples only 5 wt% loading are classified with the V0 rating in the UL-94 test, and the char yield significantly increased and the maximum weight loss rate decreased with increased ODMAS loading. Results of a three-point bending test show that the flexural modulus of ODMAS/EP is higher than that of the pure epoxy resin. All results indicate that this novel flame retardant not only has good solubility in the polymer matrix, but can also simultaneously improve the flame resistance and mechanical properties of the polymeric material.

CAS / MDL: 919-30-2

研究领域: 材料科学 · 化学工程

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Recyclable liquid-like POSS derivatives with designed structures and their potential for CO2 capture

Highly transparent and flame-retardant epoxy composites based on a hybrid multi-element containing POSS derivative