作者机构：
[Luo, Yan; Liu, Xiaomei; Wan, Hui; Shmulsky, Rubin] Mississippi State Univ, Dept Sustainable Bioprod, Mississippi State, MS 39762 USA.;[Wu, Yiqiang] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wang, Xiaodong (Alice)] Lulea Univ Technol, Wood Prod Engn, Forskargatan 1, SE-93187 Skelleftea, Sweden.;[Chu, I. Wei] Mississippi State Univ, Inst Imaging & Analyt Technol, Mississippi State, MS 39762 USA.
通讯机构：
[Wan, Hui] M;Mississippi State Univ, Dept Sustainable Bioprod, Mississippi State, MS 39762 USA.
关键词：
Isocyanate resin;Molecular weights;Morphology and structure;Phenolic resins
摘要：
Co-polymer systems of methylene diphenyl diisocyanate (MDI) and phenol-formaldehyde (PF) resins with different molecular weights were characterized by infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The FTIR and TGA coupled with differential thermogravimetric (DTG) results showed that higher molecular weight of PF resins not only promoted the reaction of isocyanate and PF co-polymer system, but also resulted in a better thermal property of prepared co-polymers. The XRD results revealed that higher molecular weight led to a higher proportion of ordered or crosslinking structures in the hybrid resin system. The relationship between the thermal resistance, mechanical properties and the molecular weights of phenolic resins needs further study.
作者机构：
[Qin Y.; 彭辉艳; 邓凌峰; 吴义强] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
[Deng, L.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[左迎峰; 赵星; 吴义强] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha;410004, China;[张彦华; 顾继友] College of Material Science & Engineering, Northeast Forestry University, Harbin;150040, China;[左迎峰; 赵星; 吴义强] 410004, China
通讯机构：
[Wu, Y.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
作者机构：
[Li, Xingong; Li, Yun; Wu, Yiqiang; He, Xia; Cheng, Xiyi; Li, Xianjun] Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha 410004, Hunan, Peoples R China.;[Liu, Dandan] Nanjing Forestry Univ, Coll Furniture & Ind Design, Nanjing 210037, Jiangsu, Peoples R China.;[Huang, Qiongtao] Yihua Enterprise Grp Co Ltd, Yihua Timber Ind, Shantou 515834, Guangdong, Peoples R China.
通讯机构：
[Li, Xianjun] C;Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha 410004, Hunan, Peoples R China.
关键词：
Dimensional stability;Energy storage and saving;Polyethylene glycol (PEG);Thermal properties;Wood
摘要：
Green fir wood (Pseudotsuga menziesii) was modified with polyethylene glycol (PEG) to produce wood composites for energy storage and conversion. The PEG-modified wood composites were evaluated based on their dimensional stability, durability, and thermal properties by various analytical methods. The differential scanning calorimetry (DSC) results showed the melting temperature and the latent heat of the phase change material (PCM) composite were 26.74 °C and 73.59 J/g, respectively. Thermal cycling tests and thermogravimetric analysis confirmed the composite exhibited good thermal stability, reliability, and chemical stability. All treated specimens were free from noticeable defects, and the addition of a surface varnish coating prevented PEG from leaching. The PEG-modified composites exhibited improved dimensional and thermal performance, which makes this material a potential candidate for economical and green, lightweight building materials.
作者机构：
[李贤军; 夏燎原; 吴义强] College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;[胡云楚] College of Science, Central South University of Forestry and Technology, Changsha, 410004, China;[黄琼涛] Guangdong Yihua Timber Industry Corporation Limited, Shantou, 515834, China
通讯机构：
[Li, X.] C;College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[肖俊华; 左迎峰; 刘文杰; 吴义强; 赵星] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[肖俊华; 左迎峰; 刘文杰; 吴义强; 赵星] 410004, China
通讯机构：
[Wu, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
期刊：
建筑材料学报,2016年19(5):860-865 and 882 ISSN：1007-9629
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[李新功; 吴义强; 张新荔; 朱晓丹; 左迎峰; 李贤军] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
作者机构：
[Song, Kunlin; Li, Mei-Chun; Wu, Qinglin; De Hoop, Corneils F.] Louisiana State Univ, AgCtr, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA.;[Lee, Sunyoung] Korea Forest Res Inst, Dept Forest Prod, Seoul 130712, South Korea.;[Wu, Yiqiang; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wu, Qinglin] L;Louisiana State Univ, AgCtr, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA.
摘要：
This research aims to develop low cost, sustainable, environmentally friendly, and high performance water-based drilling fluids (WDFs) using bentonite (BT), polyanionic cellulose (PAC), and cellulose nanocrystals (CNCs). The effect of concentration of BT, PAC, and CNCs on the rheological and filtration properties of PAC/CNC/BT-WDFs was investigated. Eight empirical rheological models were applied to fit quantitatively the fluid properties. Results showed that the presence of PAC, CNCs, and BT improved the rheological and filtration properties of the WDFs. Among the eight empirical rheological models, the Sisko model performed the best in simulating the rheological behavior of the fluids. At the same concentration level of PAC and CNCs, CNCs had more impact on the rheological properties, whereas PAC had more influence on the filtration property. The incorporation of PAC resulted in very low permeable filter cakes, leading to the excellent filtration property. The combined use of PAC and CNCs yielded better rheological and filtration properties.
