POLYMER BULLETIN
·
2021
·Vol. 79
·期 6
·3541-3553
·
IF 2.87
Du Yonggang,Wang Yiming,Yu Yueru,Shi Gonghui,Zhou Shuai,Liu Mei,Ren Shitong,Jia Xiangxiang,Zhao Ge
In this work, the bio-based epoxy nanocomposites (GER/DOPO-POSS) were prepared, and AE-POSS was synthesized and used as compatibilizer for GER/DOPO-POSS nanocomposites. The effects of AE-POSS content on mechanical properties, thermal stability, compatibility and flame retardancy of GER/DOPO-POSS nanocomposites were discussed. The results showed that the addition of AE-POSS significantly improved the dispersity of DOPO-POSS in gallic epoxy matrix. AE-POSS can improve both the thermal stability and flame retardancy of GER/DOPO-POSS nanocomposites. When 6.0 wt % AE-POSS was added in GER/DOPO-POSS, the limiting oxygen index of it was 25.6%, and the initial thermal degradation temperature of it was 36 °C higher than that without AE-POSS. Graphic abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2022
·Vol. 37
·期 4
·765-772
·
IF 1.271
Du Yonggang,Shi Gonghui,Wang Jiaming,Wang Yiming,Wang Xuhua,Wang Liwei,Yang Jinhui,Ren Shitong
The bio-based epoxy nanocomposite (GAER/DOPO-POSS) was prepared from gallic epoxy resin (GAER) and polyhedral oligomeric silsesquioxane (which containing 9,10-dihydrogen-9-oxo-10-phosphorus-phenanthrene-10-oxide groups, called DOPO-POSS). The polyhedral oligomeric silsesquioxane containing epoxy groups (E-POSS) was grafted onto aminated graphene oxide (E-GO), then the novel POSS-E-GO was obtained. The POSS-E-GO was used as modifier for GAER/DOPO-POSS nanocomposite. The influences of POSS-E-GO content on mechanical properties, dynamic mechanical properties and thermal stability of GAER/DOPO-POSS nanocomposites were determined. The experimental results show that POSS-E-GO can significantly improve the toughness of the GAER/DOPO-POSS nanocomposite. When 0.5wt% POSS-E-GO was added in GAER/DOPO-POSS nanocomposite, the impact strength of the nanocomposite was 4.74 kJ/m 2 higher than that in the absence of POSS-E-GO, meantime the initial thermal degradation temperature was 277 °C.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55692
·
IF 2.7
Yang Meng,Mengke Shi,Wenbo Feng,Lingji Zhang,Hongzhong Zhang,Xiaojing Zhang
This study prepares a series of hollow-structured CS/SA/POSS composite gel spheres with a diameter of ~2.5 mm by using hydrophilic Janus-type polyhedral oligomeric silsesquioxane (AS-POSS) as a crosslinking agent in combination with sodium alginate and chitosan via electrostatic adsorption/free radical polymerization. As the content of POSS increases, the wall thickness of the gel spheres also increases from 20 to 30 μm, leading to a more compact and smooth wall structure in the polymerized CS/SA/POSS composite gel spheres. Additionally, the introduction and polymerization of POSS significantly enhance the stability, drug loading rate, and entrapment rate of the gel spheres, providing them with improved drug release capabilities. For hydrophilic drug doxorubicin, the loading rate and encapsulation rate reach 41.2% and 79.9%, respectively, while for the hydrophobic drug ibuprofen, they are 14.7% and 76.3%. Compared to some previously reported drug-loaded gel materials, the gels prepared in this study demonstrate relatively higher drug loading performance. Thus, these hollow-structured CS/SA/POSS composite gel spheres hold promise as innovative drug carriers in the biomedical field.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2021
·Vol. 21
·期 1
·316-326
·
IF 2.025
Bing Wang,Minxian Shi,Jie Ding,Zhixiong Huang
In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol polyhedral oligomeric silsesquioxane (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified phenolic resin (POSS-PR). Chemical structures of POSS-8SH, POSS-8Phenol, and POSS-PR were confirmed by FTIR and 1 H-NMR. TG and DTG analysis under different atmosphere showed that char yield of POSS-PR at 1,000°C increased from 58.6% to 65.2% in N 2 , which in air increased from 2.3% to 26.9% at 700°C. The maximum pyrolysis temperature in air increased from 543°C to 680°C, which meant better anti-oxidation properties. XRD results confirmed both POSS-8Phenol and POSS-PR-generated crystalline SiO 2 in air, which could explain the improvement of anti-oxidation properties. SEM showed that the POSS-PR had phase separation during curing process. Finally, carbon fiber fabric-reinforced POSS-PR (C-POSS-PR) was prepared to verify the anti-oxidation properties of POSS-PR.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2023
·
IF 3.2
Farooq Aslam,Guanghao Qu,Yang Feng,Shengtao Li
It is well known that the interfacial region between the polymeric matrix and nanofiller plays a very important role in tailoring the electrical insulation properties of nanocomposite. In this study two type of polyhedral-oligomeric-silsesquioxane (POSS) are doped into epoxy (EP) to investigate the tailoring of interfacial traps that can limit the mobility of charge carriers and enhance the breakdown strength . Incorporating acryloxypropyl POSS (AP-POSS) to EP matrix improves the breakdown strength than that of pristine EP and octaphenyl POSS (OP-POSS). The molecular simulation and experiments identifies that the compatibility between EP/POSS and trap depth is dependent on the interfacial interaction energy and crosslinking density. The side groups of AP-POSS has large number of localized energy states and higher electron affinity ( E A ) that can tailor deeper traps and restrain the mobility of electrons in EP/AP-POSS. The interfacial compatibility of POSS side groups with EP tune the interfacial traps and dielectric characteristics.
研究领域:
材料科学
·
电气工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 51
·40753-40763
·
IF 3.84
Junfen Sun,Lishun Wu,Fang Hu
Octa vinyl silsesquioxane (OvPOSS) was used to synthesis POSS grafted ethylene glycol (EG) (EG-POSS). EG-POSS was synthesized by a two-step route. OvPOSS was first oxidized to prepare Epoxy-POSS. EG was used to graft Epoxy-POSS to obtain EG-POSS by ring opening reaction of epoxy groups. A polyvinylidene fluoride (PVDF)/EG-POSS hybrid membrane was prepared by a phase separation process. POSS was characterized by FTIR, NMR and TEM. The hybrid membranes were characterized by pure water flux, retention ratio to BSA, contact angle, BSA adsorption capacity, mechanical properties, XRD, SEM and AFM. The hydrophilicity and anitifouling properties of the pure PVDF membrane were improved by incorporating EG-POSS. The pure water flux of the hybrid membrane reached a maximum when 0.5% EG-POSS was added in the casting solution. The addition of EG-POSS had a positive effect on the mechanical properties of the PVDF membrane.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2022
·
IF 2.776
Wenchao Zhao,Zhen Dong,Long Zhao
In this report, the cross-linked Vinyl-POSS gel (CVPG) polymer was firstly synthesized through a facile one-step ionizing radiation method. The structure and composition of the CVPG were characterized, and the results indicated that the CVPG contained a certain amount of unreacted vinyl group which can be further functionalization to tune the properties and expand the application range of the gel polymer.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·524
·
IF 3.164
Yi Chen,Yueyun Zhou,Wenyong Liu,Hejie Pi,Guangsheng Zeng
In order to improve the performance of traditional sodium alginate (SA) hydrogels cross-linked by Ca2+ions to meet greater application demand, a strategy was designed to structure novel SA-based gels (named OP-PN gels) to achieve both stimulus responsiveness and improved mechanical strength. In this strategy, the SA chains are co-cross-linked by CaCl2and cationic octa-ammonium polyhedral oligomeric silsesquioxane (Oa-POSS) particles as the first network, and an organically cross-linked poly(N-isopropyl acrylamide) (PNIPA) network is introduced into the gels as the second network. Several main results are obtained from the synthesis and characterization of the gels. For OP-PN gels, their properties depend on the content of both uniformly dispersed Oa-POSS and PNIPA network directly. The increased Oa-POSS and PNIPA network content significantly improves both the strength and resilience of gels. Relatively, the increased Oa-POSS is greatly beneficial to the modulus of gels, and the increased PNIPA network is more favorable to advancing the tensile deformation of gels. The gels with hydrophilic PNIPA network exhibit better swelling ability and remarkable temperature responsiveness, and their volume phase transition temperature can be adjusted by altering the content of Oa-POSS. The deswelling rate of gels increases gradually with the increase of POSS content due to the hydrophobic Si–O skeleton of POSS. Moreover, the enhanced drug loading and sustained release ability of the target drug bovine serum albumin displays great potential for this hybrid gel in the biomedical field.Keywords:octa-ammonium POSS;sodium alginate;hydrogels;temperature responsiveness
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
KEY ENGINEERING MATERIALS
·
2017
·
IF 0
Qiu Hong Mu,Dan Peng,Feng Wang,Wei Ju,Fang Zhi Zhang
Octavinyl polyhedral oligomeric silsesquioxane (POSS) were used to hybrid with polysiloxane matrix by two methods, physical blending (PB) and chemical modification (CM). Mechanical, thermal and morphological properties of composites were studied by changing the percentage of POSS and investigated by thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and wide angle X-ray diffraction (XRD) measurements. The results show that the hybrid composites have better mechanical and thermal property than the parent polymer matrix, and CM-prepared composites show better reinforcing role compared with PB-prepared samples. The CM method was hydrosilylation reaction of octavinyl-POSS with hydrogen terminated poly(methylphenylsiloxane) (HPMPS) and the FTIR and NMR results of modified POSS revealed that hydrosilylation reaction took place successfully but was not complete. The modified POSS consisting partial segments of HPMPS attached to the central POSS core showed better distribution in matrix than PB-prepared POSS hybrid composites.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
SYNTHETIC METALS
·
2021
·
IF 3.266
Xing Xin,Jiarui Yu,Nan Gao,Xiaowen Xie,Shuai Chen,Jiang Zhong,Jingkun Xu
In aqueous dispersion of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), the mixture dispersion containing different proportion of polyhedral oligomeric silsesquioxanes (POSS) and dimethyl sulfoxide (DMSO) were added. These three components were physically blended to fabricate composite films for improving the mechanical properties and the water resistance of PEDOT:PSS films; a strong drawback hindering their electrical properties. The effect of the ratio of POSS compared to PEDOT:PSS was in particular investigated. It was convincingly proven that the introduction of POSS unit and strong polar DMSO improved surface roughness , hydrophobicity , stability, friction resistance and electrical properties of PEDOT:PSS films.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2015
·Vol. 31
·期 3
·484-488
·
IF 0.875
Bai Haipeng,Zheng Yaping,Li Peipei,Zhang Aibo
The trisilanol isobutyl polyhedral oligomeric silsesquioxane(POSS) was fabricated into liquid-like nanoparticle organic hybrid materials(NOHMs) with γ-(2,3-epoxypropoxy)propytrimethoxysilane as corona and polyetheramine M2070 as canopy, and the product was called liquid-like POSS NOHM. The liquid-like POSS NOHM has a low viscosity at room temperature without any solvent and the mass fraction of trisilanol isobutyl POSS was 23.38%. The liquid-like POSS NOHM shows great CO 2 capturing property with a capacity of 2.108 mmol/g( p CO 2 =6 MPa). The physical adsorption increased obviously with the pressure going up and it may make a difference between liquid-like POSS NOHMs and traditional monoethamolamine(MEA) based CO 2 absorbent. The recycle property was also studied. The NOHM behaved as fresh product even after 10 cycles.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 7
·1426
·
IF 4.967
Baoliang Wang,Lili Xing,Tieling Xing,Guoqiang Chen
In this study, a superhydrophobic fabric was synthesized by modifying the fiber’s surface with dopamine-containing hydroxyl functional groups. Furthermore, we introduced mercapto-based functional groups by the hydrolysis of mercaptopropylmethyldimethoxysilane (MPMDS) and finally grafted POSS and mercaptans using a thiol–ene click reaction. These processes generated a superhydrophobic fabric with a static contact and a sliding angle of 162° and 8°, respectively. The superhydrophobic fabric’s compact and regular micro-nano rough structure based on POSS and mercaptans provides stable fastness and durability, as well as high resistance to organic solvents, acid–base environments, mechanical abrasion, UV rays, and washing. Moreover, it can be used for self-cleaning and oil–water separation, and it has a wide range of applications in the coating industry.Keywords:dopamine;click chemistry;POSS;oil–water separation
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）