JOURNAL OF CHEMICAL THERMODYNAMICS
·
2022
·
IF 3.269
Shumin Xue,Jun Chu,Huanxin Yin,Xunqiu Wang
The gravimetric method was used to determine the solubility of triphenylphosphine in four mono-solvents (acetonitrile, tetrahydrofuran, cyclohexane, ethyl acetate) and two binary mixed solvents (acetonitrile + tetrahydrofuran, ethyl acetate + tetrahydrofuran) at normal pressure and temperature range (288.15 K-328.15 K). The results show that the solubility of triphenylphosphine in the selected solvent increased with the increase of temperature within the temperature range studied. In the binary mixed solvent (ethyl acetate + tetrahydrofuran, acetonitrile + tetrahydrofuran), the solubility of triphenylphosphine increased with the increase of the mass fraction of tetrahydrofuran. In addition, the Hansen solubility parameter (HSP) was used to explain the dissolution behavior of triphenylphosphine. The solubility data were fitted by the modified Apelblat equation, van't Hoff equation, λh equation, Apelblat-Sun equation and NRTL model. The results show that the modified Apelblat equation and van't Hoff equation have a better fitting effect on the solubility data of triphenylphosphine in the mono-solvents used in the experiment, and the modified Apelblat equation has a better fitting effect on the solubility data of triphenylphosphine in the binary mixed solvent used in the experiment. The fitting results can provide some basic data for the optimization of the crystallization process of triphenylphosphine. The thermodynamic properties of the dissolution process of triphenylphosphine in the selected solvent were calculated and discussed by van't Hoff equation, and the thermodynamic properties of the solution (Δ dis H , Δ dis S and Δ dis G ) were all positive values, which increased that the mixing and dissolution of triphenylphosphine in the selected solvent are endothermic and entropy-driven. This study can provide basic thermodynamic data for the crystallization and industrial separation of triphenylphosphine.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 3
·46979
·
IF 1.901
Yuanbo Cai,Wu Yan,Xuesong Peng,Mei Liang,Lin Yu,Huawei Zou
In this work, the acrylonitrile (AN)-styrene (St)-divinylbenzene (DVB) resin was synthesized via suspension polymerization in the presence of inert porogens as diluent. The relationship of the solubility parameter (SP) of the materials and the porous properties of the resin was investigated. These porous spherical resin particles (0.25–0.84 mm) can be used as precursors of amidoxime resin which has a high metal ion chelating efficiency. The results showed that the porous properties (surface area and mean pore width) of the resin changed with variation in the compatibility between monomers and porogens. According to the the BET theory to N 2 sorption and scanning electron microscopy (SEM), the specific surface area of the obtained beads was strongly dependent on the compatibility of the components of the system and achieved values from 3.3 to 66.8 m 2 /g. The surface area of the terpolymer beads was found to rise with a decrease in the content of acrylonitrile or an increase in the SP of the porogens. However, the variation of the pore size was just the opposite. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 46979.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 9
·3750-3758
·
IF 3.665
Si Chen,Changbo Xu,Meng Ma,Yanqin Shi,Huiwen He,Kaiyun Yuan,Ruqing Xu,Xu Wang
In this paper, a novel kind of PMMA copolymer, P(MMA- co -MAA- co -SPMA), with permanently antistatic, high toughness, and high transparent properties, was synthesized via radical copolymerization. Herein, we selected the appropriate compatibilizer α-methacrylic acid (MAA) and release agent (lauryldiethanolamine) through the calculation of solubility parameters for industrial mass production. What is more, the polymer's molecular weight was increased by improving the polymer's synthesis process. The structure and properties of the obtained copolymer were characterized. With 0.6 wt% of the 3-sulfopropyl methacrylate potassium salt (SPMA), the copolymer exhibits nearly unchanged transparency with neat PMMA, and its unnotched impact strength reaches 16 kJ/m 2 . The surface resistance of the copolymer could be reduced to 10 10 Ω, which could be considered as antistatic materials. Finally, the antistatic mechanism was analyzed. The main reason is that the hydrophilic group absorbs water to form a conductive layer on the surface, and 3-sulfopropyl methacrylate potassium salt (SPMA) is an ionic monomer that can form ion channels in water molecules, further accelerating the leakage of accumulated electrostatic charges and improving the antistatic properties of the copolymer. The method of selecting compatibilizers and release agents through solubility parameters provides more opportunities for the development of PMMA with excellent comprehensive performance.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials
·
2018
·Vol. 11
·期 2
·247
·
IF 2.467
Quanguo He,Jun Liu,Jing Liang,Xiaopeng Liu,Du Tuo,Wen Li
Solubility parameter-dependent drug releasing property is essential in practical drug delivery systems (DDS), and how to combine magnetic nanoparticles(NPs) and suitable polymer coating towards DDS is always a crucial and valuable challenge in biomedical application. Herein, a controllable drug delivery model with a surface having a chemically tunable solubility parameter is presented using hollow magnetite/polyacrylic acid (Fe3O4/PAA) nanocomposites as nanocarrier towards DDS. This composite is prepared by simply coating the modified hollow Fe3O4with PAA. The coating amount of PAA onto the surface of Fe3O4(measured by TGA) is about 40% (w/w). Then, Rhodamine 6G (R6G) is selected as model drug in drug delivery experiment. The efficiency of drug loading and drug release of these Fe3O4/PAA nanocarriers are evaluated under various temperature, solvent and pH values. As a result, the best drug releasing rate was achieved as 93.0% in pH = 7.4 PBS solution after 14 h. The releasing efficiency is 86.5% in acidic condition, while a lower releasing rate (30.0%) is obtained in aqueous solution, as different forms (polyacrylic acid and polyacrylate) of PAA present different solubility parameters, causing different salt and acid effects in various solvents, swelling property of PAA, and binding force between PAA and R6G. Therefore, by changing the solubility parameter of coating polymers, the drug delivery properties could be effectively tuned. These findings prove that the DDS based on magnetic particle cores and polymer encapsulation could efficiently regulate the drug delivery properties by tuning surface solubility parameter in potential cancer targeting and therapy.Keywords:hollow Fe3O4NPs;Fe3O4/PAA composite NPs;solubility parameter;controlled release;drug delivery systems
研究领域:
材料科学
·
生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TEXTILE RESEARCH JOURNAL
·
2018
·
IF 1.54
Lili Wang,Songsong Cui,Huagang Ni,Minghua Wu
The color performances of disperse dye washing-free printing have tight connections with the solubility parameters of polymer binders. Based on the solubility parameter theory, ethylhexyl acrylate (EHA) and methyl methacrylate (MMA) were selected as monomers. A series of polyacrylate (PA) binders were prepared by mini-emulsion polymerization. The effects of the mixed emulsifiers and the EHA-MMA mass ratios on PA properties were investigated. Results showed that PA emulsion remained more stable, the particle size and distribution were smaller, and the film possessed better tensile performances at the mass ratio of sodium lauryl sulfate (SDS):fatty alcohol polyoxyethylene ether (O-10):propylene oxide propyl alkyl phenyl polyether ammonium sulfate (V-20S) of 1.5:1:1 at 6 wt %. The larger solubility parameter differences between monomers and disperse dyes could improve color yield of the washing-free printed polyester fabric to a greater extent. At the mass ratio of EHA and MMA of 11:9 (55 wt % EHA), PA achieved the best mechanical and washing-free printing properties and surpassed the commercial binders.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2013
·
IF 1.404
Zhihua Cui,Xin Li,Xidong Wang,Kemei Pei,Weiguo Chen
Two N -heterocycle-containing benzotriazole compounds ( CBHDCP , CBMPP ) were synthesized and their structures were confirmed by FT-IR, 1 H NMR, mass spectroscopy and elemental analysis. Their spectral properties compared with that of a common commercial benzotriazole UV absorber Tinuvin 326 in solvents were measured and analyzed using molecular orbital calculations. It was found that the experimentally obtained optical properties were in close agreement with the theoretically obtained results. Besides, CBMPP is much superior to CBHDCP acting as an effective UV absorber on polyethylene terephthalate fabric due to its combinative higher exhaustion and higher molar extinction coefficient. The exhaustion difference on polyethylene terephthalate fabric among N -heterocycle-containing benzotriazoles ( CBHDCP , CBMPP ) and Tinuvin 326 were then measured and explained by the solubility parameter theory. The results agreed with the rule that compounds with higher exhaustion on fiber have solubility parameter much closer to that of fiber polymer.
研究领域:
材料化学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 10
·1149
·
IF 2.935
Jing Liu,Zhenggang Gong,Guangxu Yang,Lihui Chen,Liulian Huang,Yonghui Zhou,Xiaolin Luo
Due to the invalidity of traditional models, pretreatment conditions dependent parameter of susceptible dissolution degree of xylan (dX) was introduced into the kinetic models. After the introduction of dX, the dissolution of xylan, and the formation of xylo-oligosaccharides and xylose during ethanol based auto-catalyzed organosolv (EACO) pretreatments of bamboo were well predicted by the pseudo first-order kinetic models (R2> 97%). The parameter of dXwas verified to be a variable dependent of EACO pretreatment conditions (such as solvent content in pretreatment liquor and pretreatment temperature). Based on the established kinetic models of xylan dissolution, the dissolution of glucan and the formation of degradation products (furfural and acetic acid) could also be empirically modeled (R2> 97%). In addition, the relationship between xylan and lignin removal can provide guidance for alleviating the depositions of lignin or pseudo-lignin. The parameter of dXderived novel kinetic models can not only be used to reveal the multi-step reaction mechanisms of xylan, but also control the final removal of main components in bamboo during EACO pretreatments, indicating scientific and practical significance for governing the biorefinery of woody biomass.Keywords:kinetic models;xylan;susceptible dissolution degree (dX);ethanol based auto-catalyzed organosolv (EACO) pretreatment;bamboo
研究领域:
生物质能
·
生物化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）