Polymers
·
2022
·Vol. 14
·期 23
·5161
·
IF 4.967
Jiawei Wang,Zihua Wu,Huaqing Xie,Tingting Wang,Yuanyuan Wang,Yueming Huang,Lan Dong
A series of polyurethane/graphene oxide (PU/GO) solid–solid phase change materials (SSPCMs) were synthesized by using GO as a light-absorbing filler and polyethylene glycol (PEG) as a phase change matrix. The effects of PEG content on the energy storage capacity, thermal stability and photo–thermal conversion performance of PU were investigated. The results show that the form-stability of PU/GO decreases while the phase change enthalpy and photo–thermal conversion efficiency of PU/GO increases with the increasing PEG content. The introduction of a very low content of GO can maintain comparable energy storage density and greatly improve light absorption by reasonably modulating the soft segment contents. The PU/GO composite with 92 wt% PEG has a phase change enthalpy of 138.12 J/g and a high photo–thermal conversion efficiency (87.6%). The composite solid–solid PCMs have great potential for effective energy storage and solar energy utilization.Keywords:photo–thermal conversion polyurethane;different soft segment content;energy storage capacity;shape-stabilized
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Xiang Li,Xilong Chen,Zicheng Shan,Guangtao Qian,Chuyang Luo,Hui Zhang,Liying Zhang,Jianyong Yu
Achieving high thermal conductivity of shape memory polyimides without compromising their shape memory performance and mechanical properties is challenging. To solve this issue, a molecular structure design strategy was employed to synthesize a range of sequence-controlled block copolyimides through the introduction of soft segments into rigid segments, thereby regulating molecular chain mobility. An intrinsically thermally conductive shape memory block copolyimides with rapid shape recovery speed, exceptional shape memory and mechanical properties were achieved. Through regulating the proportion of soft segments, strong physical cross-linking structures, including π-π stacking interactions and molecular chain entanglements, were generated, ultimately achieving shape fixity and recovery ratios of 97.4 % and 99.6 %, respectively. Owing to their relatively ordered molecular structures, which contributed to high intrinsic thermal conductivity, the developed copolyimides displayed a rapid shape recovery speed of 3.5 s at a trigger temperature of 275 °C. The molecular structure design strategies employed might offer deep insight into the exploration of shape memory polyimides.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2017
·Vol. 22
·期 4
·1109-1121
·
IF 2.316
Ren Naiqing,Song Youxin,Tao Can,Cong Bing,Cheng Qin,Huang Yiping,Xu Gewen,Bao Junjie
A series of waterborne polyurethane (WPU) with various hard segment and soft segment content were synthesized by hexamethylene diisocyanate (HDI), polyethylene glycol (PEG), dimethylol propionic acid (DMPA), and diethylene glycol (DEG). An increase in hard segment content decreased the crystallinity and thermal stability of WPU. Solid polymer electrolytes (SPEs) were prepared by complexing the as-prepared WPU with LiTFSI. The ionic conductivity increased first with the increasing of the hard segment content and then decreased. The compatibility of WPU-based SPEs with lithium electrode was influenced by the hard segment content. The electrochemical stability windows for all the SPEs have reached around 5.0 V (vs. Li + /Li) at 60 °C. A maximum ion conductivity of 5.14 × 10 −5 S cm −1 at 25 °C was found for WPU12-20%Li and 1.29 × 10 −3 S cm −1 at 60 °C for WPU12-25%Li. All-solid-state LiFePO 4 /SPE/Li battery based on WPU12-20%Li electrolyte delivered discharge specific capacities of 159 and 162 mAh g −1 under 60 and 80 °C at 0.1 C, respectively. Tuning the appropriate hard and soft segment composition of WPU may ultimately lead to the successful use of WPU-based SPEs for all-solid-state lithium ion batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2016
·Vol. 34
·期 7
·901-909
·
IF 1.811
Cui Bin,Wu Qing-Yun,Gu Lin,Shen Liang,Yu Hai-bin
In this work, a series of high performance bio-based polyurethanes (bio-PUs) were synthesized from polylactide (PLA)-based diols, different diisocyanates (TDI, MDI, HDI, IPDI) and chain extender 1,4-butanediol, in which different soft and hard segments are used to adjust their transition temperatures and mechanical properties. Poly(lactide- co -caprolactone) copolymer diols ( co -PLAols) instead of PLA diols as the soft segment improved the thermal stability and mechanical properties of the synthesized bio-PUs. Among them, MDI-based bio-PUs have the highest T
g (43.8 °C), tensile strength (23.5 MPa) and modulus (380.8 MPa), while HDI-based bio-PUs have the lowest T
g (21.4 °C) and highest elongation at break (580%). Especially, the bio-PUs synthesized from co -PLAols and MDI demonstrate better mechanical properties, closed to petroleum-based commodities. Furthermore, the obtained bio-PUs display good shape memory properties at body temperature and cytocompatibility. Therefore, these bio-PUs are promising for applications in biomedical fields.
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
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yujie Wang,Lili Wang,Hao Liu,Suqin He,Xuying Liu,Wentao Liu,Miaoming Huang,Chengshen Zhu
Development of smart polyurethane (PU) coatings for enhancing the biocompatibility of the metal scaffold has attracted great interest in the past few years, and the investigation of the relationship between phase structure and smart properties is necessary. Herein, two series of PU biocoatings with different hard segment structures and soft segment length were prepared, and the soft segments consist of the polycaprolactone diols (PCL) with different molecular weights, and the hard segments were made of 1, 4-butanediol (BDO) and hexamethylene diisocyanate (HDI) with linear structure, or BDO and isophorone diisocyanate (IPDI) with alicyclic structure, respectively. To understand the phase structures, the chemical structure, surface micromorphology, and segmental incompatibility of the PU films were characterized, which reveals that IPDI-based PU possesses a phase compatible structure with a single-phase transition above 0 °C. Besides, the IPDI-based PU shows the thermal-responsive deformation at the temperature of 45 °C, slightly higher than the human body temperature. In contrast, the HDI-based PU possesses the excellent shape memory property caused by the microphase separation structure, because of the crystallization of soft and hard segments from the melt. Further, based on the characteristics of phase structure, the potential application of the IPDI-based PU and HDI-based PU is explored, offering a useful approach to effectively design the structures and properties of PU coatings.
研究领域:
生物材料学
·
高分子化学
·
医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 1
·期 24
·3099-3106
·
IF 0
Chunfeng Ma,Liguo Xu,Wentao Xu,Guangzhao Zhang
Degradable polyurethane (PU) with copolyester oligomer consisting of ε-caprolactone (CL) and glycolide (GA) as the soft segments has been prepared by a combination of ring-opening polymerization and condensation reaction. Enzymatic and hydrolytic degradation experiments demonstrate that the PU can degrade in seawater. Such a polyurethane exhibit a more rapid degradation in comparison with that with poly(ε-caprolactone) (PCL) soft segments because the introduction of GA can reduce the crystallinity, as revealed by differential scanning calorimetry (DSC) and polarizing optical microscope (POM). Marine field tests show that the degradable polyurethane has good antifouling ability due to its self-renewal property. Besides, such polyurethane can serve as a carrier and controlled release system for an antifoulant, and the incorporation of an antifoulant in the polyurethane can significantly improve the antifouling ability and duration.
研究领域:
材料科学
·
海洋生物学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
ACS Omega
·
2017
·
IF 0
Weikeng Luo,Jiaxiang Qin,Min Xiao,Dongmei Han,Shuanjin Wang,Yuezhong Meng
High-molecular-weight poly(propylene carbonate) (PPC) [number-average molecular mass (Mn): 80 000–100 000] is readily alcoholized into PPC macrodiols in the presence of 1,2-propanediol (PDO), 1,4-butanediol (BDO), or 1,6-hexanediol (HDO). The high-molecular-weight PPC and small amount of diols, such as PDO, BDO, or HDO, were stirred at elevated temperatures to convert the extremely viscous high-molecular-weight polymer to low-molecular-weight macrodiols with gel permeation chromatography-measured Mn of about 3000 Da. The chopping reaction of the high-molecular-weight PPC was studied in detail, such as the influences of the catalyst residue, the kinds of alcoholysis agents, reaction temperature, and time. The reaction mechanism of alcoholysis is proposed according to the experimental results. The results indicate that the presence of a trace residue of zinc catalyst (Zn-G-III) in PPC, excess diol feeding, and higher temperature can accelerate the alcoholysis. Moreover, different diols can produce different PPC macrodiols with varying end-capping. Finally, polycarbonate ether urethane can be successfully synthesized using as-synthesized PPC macrodiols and poly(propylene glycol) (Mn ≈ 3000) as the soft segment and 4,4′-diphenylmethane diisocyanate or BDO as the hard segment. The full evaluation for the synthesized PPC macrodiols demonstrates their potential applications in the polyurethane industry.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
RSC Advances
·
2016
·Vol. 6
·期 98
·95527-95534
·
IF 3.289
Wei Liu,Ruoyu Zhang,Miaoming Huang,Xia Dong,Wei Xu,Yubin Wang,Guo-Hua Hu,Jin Zhu
A series of thermoplastic poly(ester urethane)s (PUs) containing poly(butylene 1,4-cyclohexanedicarboxylate) (PBC) as a soft segment were prepared for shape memory materials via a two-step synthesis, with isophorone diisocyanate and 1,4-butanediol as its hard segments. The isomerization of the 1,4-cyclohexylene ring moiety (CHRM) happened during the preparation of PBC oligomers with molecular weight of 1700, 2300 and 3300 g mol−1, but such phenomenon was not observed during the reaction for the synthesis of PU. The three PBC oligomers could all crystallize, but their crystallization ability was depressed after incorporation of PUs. Thermo, thermo-mechanical and mechanical properties of the corresponding PUs were studied to understand their structural information. It was found that the PU containing PBC1700 was an elastomer at elevated temperatures, and its shape memory properties were evaluated by DMA procedures. Regardless of its low degree of micro-phase separation, it was very interesting to find that the shape recovery ability of such PU was excellent, which was in contrast to traditional findings.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 7
·3139-3156
·
IF 3.442
Yang Zhihui,Wu Guangfeng
Traditional 3D printing materials are not suitable for tissue engineering due to their toxicity, low degradability and poor biocompatibility. In this study, a new amphiphilic biodegradable waterborne polyurethane (WBPU) was developed by a green and sustainable process without any organic solvents, catalysts or cross-linkers. The soft segments of this kind of WBPU were formed by replacing hydrophobic poly(ε-caprolactone) diol with hydrophilic poly(ethylene glycol) (PEG). Different block lengths of PEG were used for this purpose. The combination of ester and ether groups endowed WBPU with amphiphilic characteristics, which is important for regeneration and maintenance of tissue. The effects of composition and content of soft segments on the phase separation, thermal properties, mechanical properties, water absorption, biodegradability and cytotoxicity of WBPU were investigated. The results showed that the desired properties of WBPU could be achieved by tuning the block length of PEG and content of soft segments. The present work provided a new approach to prepare WBPUs with amphiphilic and biodegradable characteristics, which are promising candidates for 3D printing materials for tissue engineering scaffolds.
研究领域:
材料科学
·
生物医学工程
·
高分子化学
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2021
·Vol. 12
·期 23
·3427-3440
·
IF 5.582
Qun Jia,Zhi-Chao Yan,Yanan Li,Junfeng Liu,Yuansheng Ding,Yujian Liu,Jian Li,Yougen Chen
A series of well-defined di- and triblock acrylic copolymers consisting of hard poly(dicyclopentanyl acrylate) (PdcPA) and soft poly(alkyl acrylate) (PAA) blocks are synthesized by the N-(trimethylsilyl)bis(trifluoromethanesulfonyl)imide (Me3SiNTf2) catalyzed group transfer polymerization (GTP) of dicyclopentanyl acrylate (dcPA) and alkyl acrylate (AA) including n-butyl acrylate (nBA), n-octylacrylate (nOA), 2-ethylhexyl acrylate (EHA), and n-dodecyl acrylate (nDA). The distribution of the monomeric units of the copolymers is controlled through the addition sequence of the comonomers and by the used initiator. In greater detail, the mixed addition of AA and dcPA using the monofunctional 1-methoxy-1-triisopropylsiloxy-2-methylpropene (MTSiPr) as the initiator produces the statistical poly[(alkyl acrylate)-stat-(dicyclopentanyl acrylate)] (Poly(AA-stat-dcPA)), the sequential addition of AA and then dcPA using MTSiPr as an initiator produces the AB-type hard–soft diblock poly(alkyl acrylate)-block-poly(dicyclopentanyl acrylate) (PAA-b-PdcPA), the sequential addition of AA and then dcPA using the bifunctional 1,2-bis[2-methyl-1-(triisopropylsiloxy)prop-1-enyloxy]ethane (MTSiPr2) as the initiator affords the ABA-type hard–soft–hard triblock poly(dicyclopentanyl acrylate)-block-poly(alkyl acrylate)-block-poly(dicyclopentanyl acrylate) (PdcPA-b-PAA-b-PdcPA), and the reverse addition of the two monomers using MTSiPr2 affords the soft–hard–soft BAB-type triblock poly(alkyl acrylate)-block-poly(dicyclopentanyl acrylate)-block-poly(alkyl acrylate) (PAA-b-PdcPA-b-PAA). The formation of the statistical and block copolymers has been confirmed by 1H NMR spectroscopy and size exclusion chromatography (SEC) measurements. Afterwards, the glass transition behavior of the resulting copolymers is analyzed by both differential scanning calorimetry (DSC) and rheometry. A detailed discussion of this part is presented in the following sections.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wencai Wang,Siao Sun,Shikai Hu,Bin Yang,Shaoyun He,Runguo Wang,Liqun Zhang
Thermoplastic polysiloxane-based polyurethane (Si-TPU) has been attracting a great deal of attention because of the dual advantages of polysiloxane and polyurethane. However, the strength of Si-TPU with a traditional structure is low, and improvement is urgently needed for diverse applications. Herein, we design a polysiloxane-based soft segment (SS) with two urethane groups at the end of the polysiloxane chain, and then we prepare a series of Si-TPUs through a designed SS, isophorone diisocyanate and 1,4-butanediol. Such structural design improves the polarity of the SS and endows more regular hydrogen bonds to the polymer molecular chain. As a result, the prepared Si-TPUs exhibit a good microphase separation structure, unprecedentedly high strength, repeatable processing, noncytotoxicity, shape memory properties, and three-dimensional printing capabilities. Moreover, a maximum tensile strength of Si-TPUs can reach 20.3 MPa, exceeding that of other existing Si-based polymer materials. Si-TPUs show great potential for biomedical applications.
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
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Ruixue Gao,Jinggang Wang,Fei Liu,Hang Dai,Xiaoqin Zhang,Xiaoxing Wang,Yiguo Li,Jin Zhu
As a novel polyester possessing high melting temperature and well crystallization ability, poly(1,4-cyclohexanedimethylene furandicarboxylate) (PCF), produced from bio-based 2,5-furandicarboxylic acid and 1, 4-cyclohexanedimethanol, could be used as promising hard segment to develop new bio-based thermoplastic poly(ether-ester) elastomer (TPEE). Multiblock poly(ether-ester)s based on PCF, with molecular weight ( M n ) of soft segments poly(tetramethylene glycol) (PTMG) ranging from 250 to 2900 g/mol while maintaining the weight fraction at 70%, were synthesized to investigate the effects of soft segments length on microphase structure and thermodynamic properties of copolymers. The results show that the increase in M n of the soft segment promotes the microphase separation of the copolymers. Macroscopically, copolymers have excellent comprehensive properties. T m was promoted from 126.0 to 228.7 °C, and T d,5% was higher than 320 °C. The tensile strength and modulus of resulting copolymers were within the range of 14–26 MPa and 29–53 MPa, respectively, with elongation at break exceeding 550%. The copolymer exhibited elastic recovery ratio of 75.5% at 200% strain when the M n of PTMG unit was 2000 g/mol. This work introduces a new bio-based TPEE and enriches a detailed understanding of the impact of soft segments length on the structural properties of TPEE, which is fundamental to design tailor-made TPEE with desired properties.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）