Co-reporter:Saleem Raza, Xueyong Yong, Bowen Yang, Riwei Xu, and Jianping Deng
ACS Sustainable Chemistry & Engineering November 6, 2017 Volume 5(Issue 11) pp:10011-10011
Publication Date(Web):September 25, 2017
DOI:10.1021/acssuschemeng.7b01956
A novel type of hollow polymer particles containing carboxyl groups was prepared from a widely available biophenylpropene trans-anethole (ANE). To prepare the hollow particles, we first prepared polymeric particles using vinyl acetate and maleic anhydride (MAH), and then such particles were taken as sacrificial templates for the subsequent formation of core/shell particles, which were synthesized by using ANE and MAH as comonomers and divinylbenzene (DVB) as cross-linking agent through precipitation polymerization. After removing the core in the prepared core/shell particles, we obtained hollow particles and then hydrolyzed the anhydride groups into carboxyl functional groups. The hollow particles were characterized by FT-IR, SEM, and TEM, and further used as absorbents. The maximum adsorption toward Cu2+ and methylene blue reached 270 and 940 mg/g, respectively. The recycling study showed that the biobased hollow particles can be easily restored and reused. The hollow particles may find practical applications as sustainable absorbents. The established methodology for preparing hollow polymer particles is expected to be applicable for other biophenylpropenes.Keywords: Biomass; Green absorbents; Hollow particles; trans-Anethole;
Co-reporter:Maoshan Niu;Tao Li;Riwei Xu;Xiaoyu Gu;Dingsheng Yu ;Yixian Wu
Journal of Applied Polymer Science 2013 Volume 129( Issue 4) pp:1833-1844
Publication Date(Web):
DOI:10.1002/app.38877
Abstract
Polystyrene (PS)-incorporated polyhedral oligomeric silsesquioxanes (POSS) organic–inorganic hybrid graft copolymer could be achieved by click coupling reaction between alkyne groups in POSS and azido groups in PS via “graft onto” strategy. Alkyne-functionalized POSS was synthesized via thiol-ene facile click reaction and subsequent amidation reaction with very high yield. Azido-multifunctionalized PS could be synthesized by chloromethylation and subsequent azido reaction. The chemical structures of PS-(CH2Cl)m, PS-(CH2N3)m, and PS-g-POSS were determined by Fourier transform infrared and 1H NMR characterization. PS-g-POSS presented a better hydrophobic property with contact angle of 113° than that of PS (85°). And PS-g-POSS with ≤5% of grafting degree had lower glass transition temperature (Tg) than that of PS and then it increased up to 112°C with grafting degree. An obvious aggregation of POSS phase with 10–80 nm in size was formed in PS-g-POSS matrix. In addition, 5 wt % of PS-g-POSS was added to general purpose polystyrene (GPPS) to remarkably improve its tensile strength from 45 to 57 MPa. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Co-reporter:Maoshan Niu, Riwei Xu, Pei Dai, Yixian Wu
Polymer 2013 Volume 54(Issue 11) pp:2658-2667
Publication Date(Web):9 May 2013
DOI:10.1016/j.polymer.2013.02.042
A novel organic–inorganic hybrid copolymer has been achieved by incorporating polyhedral oligomeric silsesquioxanes (POSS) into the hard polystyrene segments in thermoplastic elastomer of poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) via click coupling reaction of alkyne group in POSS with azido groups in SEBS by Cu(I)-catalyzed 1,3-dipolarcycloaddition. The alkyne-functionalized POSS could be synthesized via thiol-ene facile click reaction and subsequent amidation reaction with high conversion near to 100%. Azido-functionalized SEBS (SEBS–CH2N3) with different functionalities could be synthesized by chloromethylation of phenyl groups and subsequent azido reaction. The obvious POSS inorganic phase aggregates of around 30 nm in size formed and homogeneously dispersed in SEBS matrix. The SEBS-g-POSS copolymer presented a good hydrophobic property with contact angle of 94.8°. The final decomposition temperature was increased by c.a. 20 °C in comparison with that of SEBS. SEBS-g-POSS makes a contribution to improvements in tensile stress and modulus of PS/SEBS-g-POSS composites due to the hard core with Si–O–Si inorganic structure of POSS. Compared to parallel PS/SEBS composite without any inorganic phase, tensile strength and modulus of PS/SEBS-g-POSS (90/10) blend could be increased by 35% and by 10% respectively.
Co-reporter:Lei Wang;Wenjie Du;Yixian Wu;Riwei Xu;Dingsheng Yu
Journal of Applied Polymer Science 2012 Volume 126( Issue 1) pp:150-155
Publication Date(Web):
DOI:10.1002/app.36490
Abstract
In this article, a novel latent curing agent, octa(paratoluenesulfonic acid ammomium salt) (OPAAS) polyhedral oligomeric silsequioxane was synthesized and used in modifying the polybenzoxazine/2,2′-(1,3-phenylene)-bis(4,5-dihydro-oxazoles) (PBO) (PBZ/PBO) resin. The liberated octa(aminophenyl) silsesquioxane and paratoluenesulfonic acid can catalyze the ring-opening reaction of benzoxazine (BZ) resin. The initial curing temperature (Ti), peak curing temperature (Tp) and the Enthalpy of the curing temperature had significantly decreased with respect to pristine BZ/PBO resin. When the OPAAS amount was 3 wt %, the peak curing temperature decreased from 233.7 to 218.2°C. Also, PBZ/PBO/OPAAS composites exhibited better storage modulus than pure PBZ/PBO resin. Meanwhile, PBZ/PBO/OPAAS composites are more thermally stable than PBZ/PBO resin. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Co-reporter:Wenjie Du, Jiajia Shan, Yixian Wu, Riwei Xu, Dingsheng Yu
Materials & Design (1980-2015) 2010 Volume 31(Issue 5) pp:2698
Publication Date(Web):May 2010
DOI:10.1016/j.matdes.2010.01.024
Co-reporter:Wenjie Du, Jiajia Shan, Yixian Wu, Riwei Xu, Dingsheng Yu
Materials & Design (1980-2015) 2010 Volume 31(Issue 4) pp:1720-1725
Publication Date(Web):April 2010
DOI:10.1016/j.matdes.2009.01.050
The benzoxazine/incomplete trisilanol POSS mixtures were prepared by solvent method, and the corresponding composites were obtained after curing. The structures, curing behavior and thermal properties were characterized by FTIR, X-ray diffraction, DSC, DMA and TGA. The results showed that chemical bonds have been formed between trisilanolphenyl POSS and PBZ, and trisilanolphenyl POSS possessed better compatibility with the matrix than trisilanolisobutyl POSS; the dynamic viscoelastic properties and thermal stability of the composites have been greatly enhanced by the incorporation of trisilanolphenyl POSS. However, the improvements on the dynamic viscoelastic properties of PBZ/trisilanolisobutyl POSS were not so markedly.
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