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学者姓名：林巧佳
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Abstract ：
Wood based composites are widely used in furniture and other building construction, but the majority of which are bonded with formaldehyde-based resins that may cause serious health concern. This study presents an environmentally-friendly soybean based resin via combination of waste newspaper powder (WNP), soybean flour (DSF), and polyamidoamine-epichlorohydrin for woody composites, and its adhesion properties as investigated via shear strength. The results showed that the developed DSF-WNP resin (or soybean based resin) cured well at currently commercial plywood manufacture temperature (130 degrees C) and could be cured at a lower temperature of 85 degrees C for energy saving as well, through chemical cross-linking reactions between hydroxyl-azetidinium ring groups in the polyamidoamine-epichlorohydrin and hydrophilic groups, such as amido, carboxyl and hydroxyl in other components. WNP with particle sizes ranging from 120 mu m to 250 mu m were suitable for the resin applications. WNP resulted in poor dispersion, but lowered water absorption and increased insoluble fraction content and tensile strength in the cured resin. The wet shear strength of plywood bonded with DSF-WNP resin with a 2/5 dry weight ratio of WNP/DSF was 1.24 MPa, which met the requirements of the Chinese National Standard GB/T 9846-2015 for interior plywood. The resin characteristics including fast curing and excellent wet-cohesion performance are comparable to the mostly used urea-formaldehyde adhesives, which showed great potential in wood composites as an alternative to formaldehyde-derived adhesives.
Keyword ：
Adhesion Adhesion Adhesive Adhesive Fiber Fiber Protein Protein Waste newspaper Waste newspaper Wood Wood
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| GB/T 7714 | Yin, Hao , Zheng, Peitao , Zhang, Erbing et al. An environmentally-friendly soybean based resin as an alternative to formaldehyde-based counterpart for biomass composites [J]. | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES , 2021 , 104 . |
| MLA | Yin, Hao et al. "An environmentally-friendly soybean based resin as an alternative to formaldehyde-based counterpart for biomass composites" . | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES 104 (2021) . |
| APA | Yin, Hao , Zheng, Peitao , Zhang, Erbing , Rao, Jiuping , Lin, Qiaojia , Fan, Mizi et al. An environmentally-friendly soybean based resin as an alternative to formaldehyde-based counterpart for biomass composites . | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES , 2021 , 104 . |
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Abstract ：
Efficient enzymatic hydrolysis of cellulose in lignocellulose to glucose is one of the most critical steps for the production of biofuels. The nonproductive adsorption of lignin to expensive cellulase highly impedes the development of biorefinery. Understanding the lignin-cellulase interaction mechanism serves as a vital basis for reducing such nonproductive adsorption in their practical applications. Yet, limited report is available on the direct characterization of the lignin-cellulase interactions. Herein, for the first time, the nanomechanics of the biomacromolecules including lignin, cellulase, and cellulose were systematically investigated by using a surface force apparatus (SFA) at the nanoscale in aqueous solutions. Interestingly, a cation-pi interaction was discovered and demonstrated between lignin and cellulase molecules through SFA measurements with the addition of different cations (Na+, K+, etc.). The complementary adsorption tests and theoretical calculations further confirmed the validity of the force measurement results. This finding further inspired the investigation of the interaction between lignin and other noncatalytic-hydrolysis protein (i.e., soy protein). Soy protein was demonstrated as an effective, biocompatible, and inexpensive lignin-blocker based on the molecular force measurements through the combined effects of electrostatic, cation-pi, and hydrophobic interactions, which significantly improved the enzymatic hydrolysis efficiencies of cellulose in pretreated lignocellulosic substrates. Our results offer quantitative information on the fundamental understanding of the lignin-cellulase interaction mechanism. Such unraveled nanomechanics provides new insights into the development of advanced biotechnologies for addressing the nonproductive adsorption of lignin to cellulase, with great implications on improving the economics of lignocellulosic biorefinery.
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| GB/T 7714 | Zheng, Peitao , Xiang, Li , Chang, Jian et al. Nanomechanics of Lignin-Cellulase Interactions in Aqueous Solutions [J]. | BIOMACROMOLECULES , 2021 , 22 (5) : 2033-2042 . |
| MLA | Zheng, Peitao et al. "Nanomechanics of Lignin-Cellulase Interactions in Aqueous Solutions" . | BIOMACROMOLECULES 22 . 5 (2021) : 2033-2042 . |
| APA | Zheng, Peitao , Xiang, Li , Chang, Jian , Lin, Qiaojia , Xie, Lei , Lan, Tu et al. Nanomechanics of Lignin-Cellulase Interactions in Aqueous Solutions . | BIOMACROMOLECULES , 2021 , 22 (5) , 2033-2042 . |
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Abstract ：
Development of eco-friendly adhesives from renewable biomass has attracted considerable attention in recent years. Here, we present a novel approach via combination of waste newspaper (WNP) powder, oxidized glutinous rice starch, and polyamidoamine-epichlorohydrin (PAE) to prepare a formaldehyde-free starch-cellulosic adhesive (SCA) for woody composites. The oxidation treatment made the carboxyl/carbonyl groups more available in starch. Plywood bonded by the optimum SCA with 50 wt% of the WNP powder showed a wet shear strength of 0.83 MPa exceeding that of the oxidized starch adhesive by 130.5 %. During the curing process of SCA, the oxidized starch and WNP fiber participated into the crosslinking reaction with PAE via ester and ether bonds, as evidenced by FTIR analysis. The resulting cured adhesive had enhanced crystalline structures, thermal properties, hydrophobicity, wet-cohesion, rheological properties, and adhesiveness to wood. The SCA showed great potential in wood composites as an alternative to formaldehyde-derived adhesives.
Keyword ：
Carbohydrate Carbohydrate Formaldehyde-free Formaldehyde-free Newspaper Newspaper Resin Resin Wood Wood
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| GB/T 7714 | Yin, Hao , Zheng, Peitao , Zhang, Erbing et al. Improved wet shear strength in eco-friendly starch-cellulosic adhesives for woody composites [J]. | CARBOHYDRATE POLYMERS , 2020 , 250 . |
| MLA | Yin, Hao et al. "Improved wet shear strength in eco-friendly starch-cellulosic adhesives for woody composites" . | CARBOHYDRATE POLYMERS 250 (2020) . |
| APA | Yin, Hao , Zheng, Peitao , Zhang, Erbing , Rao, Jiuping , Lin, Qiaojia , Fan, Mizi et al. Improved wet shear strength in eco-friendly starch-cellulosic adhesives for woody composites . | CARBOHYDRATE POLYMERS , 2020 , 250 . |
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Abstract ：
本发明公开了一种生物质浸渍胶膜纸及其制备方法，其是先将含植物蛋白的生物质原料制备成含微胶囊结构的生物质胶黏剂，再用其对碱处理过的原纸进行施胶，并经烘干制成所述生物质浸渍胶膜纸。在热压或模压制作木制品的过程中，涂覆在原纸上的生物质胶黏剂中的微胶囊受压力破裂，与胶黏剂中其它组分及木质纤维发生交联反应而固化，以快速实现胶接，且制备的木制品有较好的耐水性，可用于各种室内场合。
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| GB/T 7714 | 陈奶荣 , 李吉庆 , 张二兵 et al. 一种生物质浸渍胶膜纸及其制备方法 : CN202010833925.X[P]. | 2020-08-18 . |
| MLA | 陈奶荣 et al. "一种生物质浸渍胶膜纸及其制备方法" : CN202010833925.X. | 2020-08-18 . |
| APA | 陈奶荣 , 李吉庆 , 张二兵 , 朱志强 , 赵建良 , 赵丹丹 et al. 一种生物质浸渍胶膜纸及其制备方法 : CN202010833925.X. | 2020-08-18 . |
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本发明公开了一种压力响应的室温固化木材胶黏剂及其制备方法，其是以含植物蛋白的生物质为原料，经酸处理后过滤分离，分别获得含植物蛋白和含可溶性多糖的两部分物质，然后将含可溶性多糖的物质与交联剂、扩链剂混合反应制成微胶囊，再将所得微胶囊与含植物蛋白的物质混合，以制得所述压力响应的室温固化木材胶黏剂。在外界压力作用下，所述胶黏剂中的微胶囊破裂，使其中含有的成分释放而与含植物蛋白的部分发生交联固化，以实现胶接，其无甲醛释放，适用期长，且无需高温条件，应用方便，具有良好市场推广前景。
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| GB/T 7714 | 陈奶荣 , 殷豪 , 张二兵 et al. 一种压力响应的室温固化木材胶黏剂及其制备方法 : CN202010833000.5[P]. | 2020-08-18 . |
| MLA | 陈奶荣 et al. "一种压力响应的室温固化木材胶黏剂及其制备方法" : CN202010833000.5. | 2020-08-18 . |
| APA | 陈奶荣 , 殷豪 , 张二兵 , 朱志强 , 赵建良 , 赵丹丹 et al. 一种压力响应的室温固化木材胶黏剂及其制备方法 : CN202010833000.5. | 2020-08-18 . |
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This study investigated the feasibility of an environmentally friendly incense consisting of a soy-based adhesive and miscellaneous wood powder (MWP). Key properties, such as water absorption, burning speed, density, and tensile strength, were examined. The suitable adhesive usage amount for the preparation of incense was 31.8%. When the soy-based adhesive contained 3% polyvinyl alcohol (PVOH), the water absorption, burning speed, density, and tensile strength of the incense were 24.6%, 13.93%, 0.713 g/cm(3), and 1.01 MPa, respectively. Incense made of soy-based adhesive with PVOH displayed a higher tensile strength and decreased moisture resistance. The denser structure and even distribution of the MWP was observed via scanning electron microscopy of the incense with soy-based adhesive modified by 3% PVOH. When paraffin wax was added with the MWP, the incense had a higher moisture resistance, but the effects on the tensile strength were negligible. A combination of PVOH-modified soy-based adhesive, paraffin wax, and MWP was found to be suitable for preparing an environmentally friendly incense.
Keyword ：
Incense Incense Paraffin wax Paraffin wax Soy-based adhesive Soy-based adhesive Wood powder Wood powder
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| GB/T 7714 | Yin, Hao , Lin, Qiaojia , You, Zeming et al. Investigation of an Environmentally Friendly Incense Consisting of Soy-based Adhesive and Wood Powder [J]. | BIORESOURCES , 2019 , 14 (3) : 5097-5108 . |
| MLA | Yin, Hao et al. "Investigation of an Environmentally Friendly Incense Consisting of Soy-based Adhesive and Wood Powder" . | BIORESOURCES 14 . 3 (2019) : 5097-5108 . |
| APA | Yin, Hao , Lin, Qiaojia , You, Zeming , Qiu, Jiugen , Zhang, Erbing , Chen, Nairong . Investigation of an Environmentally Friendly Incense Consisting of Soy-based Adhesive and Wood Powder . | BIORESOURCES , 2019 , 14 (3) , 5097-5108 . |
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This study reports on the preparation and application of bio-based adhesive derived from renewable defatted soy flour (DSF) and epichlorohydrin (ECH), aiming at substituting formaldehyde-based adhesives in the wood industry. DSF was treated with Viscozyme((R)) L to hydrolyze plant cell wall carbohydrates and then adjusted to an extremely low pH with hydrochloric acid containing ferric chloride to unfold the tertiary and/or quaternary structure of soy protein and expose its functional groups. The treated DSF was then glycidized with ECH to obtain the bio-based adhesive. The resulting adhesive contained epoxy groups, which were evidenced by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and H-1 nuclear magnetic resonance. After curing, the epoxy groups contributed to good thermal stability and gluability of the adhesive. The grafting ratio of ECH decreased by 37.8% as the mass fraction added was increased from 5 to 25%, whereas the viscosity increased sharply by 2889.5% and the solid content increased slowly by 10.5%. Wet shear strength of Pinus massoniana plywood bonded with the bio-based adhesive with an ECH mass fraction of>10% of the DSF mass was higher than 0.93MPa, which met the requirements of the Chinese National Standard for plywood for interior/exterior applications. These results support the use of soy flour-based adhesives for plywood and provide data for evaluating their use as sustainable materials for other applications.
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| GB/T 7714 | Chen, Nairong , Lin, Qiaojia , Zheng, Peitao et al. A sustainable bio-based adhesive derived from defatted soy flour and epichlorohydrin [J]. | WOOD SCIENCE AND TECHNOLOGY , 2019 , 53 (4) : 801-817 . |
| MLA | Chen, Nairong et al. "A sustainable bio-based adhesive derived from defatted soy flour and epichlorohydrin" . | WOOD SCIENCE AND TECHNOLOGY 53 . 4 (2019) : 801-817 . |
| APA | Chen, Nairong , Lin, Qiaojia , Zheng, Peitao , Rao, Jiuping , Zeng, Qinzhi , Sun, Jianping . A sustainable bio-based adhesive derived from defatted soy flour and epichlorohydrin . | WOOD SCIENCE AND TECHNOLOGY , 2019 , 53 (4) , 801-817 . |
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Soy-based bio-adhesives are considered as potential substitutes for formaldehyde-based wood adhesives due to their environmental safety and broad availability. However, high curing temperatures (120-180 degrees C) makes them less energy efficient for wood processing. In the present study, an ambient temperature-curable soy-based adhesive was prepared via the emulsion polymerization of soy flour and styrene. The results of Fourier-transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ((HNMR)-H-1) confirmed that N-methylolacrylamide had grafted onto the soy flour components, and subsequently copolymerized with styrene. The developed soy-based adhesive achieved a wet shear strength of 1.04 MPa with 5% styrene and 8% pMDI, which exceeded the bonding strength requirements of plywood for exterior applications. Soy flour components are essential for this ambient temperature-curable adhesive system. The emulsion soy-based adhesive facilitates moisture evaporation at ambient temperature, and polymeric methylenediphenyl diisocyanate (pMDI) was introduced to produce a crosslinked structure with high water resistance and thermal stability. The soy-based adhesive developed in this study showed great potential in wood composites thanks to its high performance and low curing temperature.
Keyword ：
Adhesives for wood Adhesives for wood Composites Composites Macro-shear Macro-shear Water resistance Water resistance
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| GB/T 7714 | Zheng, Peitao , Zeng, Qinzhi , Lin, Qiaojia et al. Investigation of an ambient temperature-curable soy-based adhesive for wood composites [J]. | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES , 2019 , 95 . |
| MLA | Zheng, Peitao et al. "Investigation of an ambient temperature-curable soy-based adhesive for wood composites" . | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES 95 (2019) . |
| APA | Zheng, Peitao , Zeng, Qinzhi , Lin, Qiaojia , Fan, Mizi , Zhou, Jianhui , Rao, Jiuping et al. Investigation of an ambient temperature-curable soy-based adhesive for wood composites . | INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES , 2019 , 95 . |
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With rising environmental and human health concerns, the development of wood adhesives has shifted from petrochemical feedstocks to low-cost biobased feedstocks. Here we report a novel approach to prepare a sustainable and environmentally friendly soy adhesive. A low-cost fermentation broth of Aspergillus niger contained an enzyme complex that showed excellent performance in hydrolyzing polysaccharides in defatted soy flour (DSF). Efficient hydrolysis of polysaccharides in DSF by this enzyme complex was proved by the increased reducing sugar concentration in hydrolysate, the decreased content of water-insoluble substances, and the weakened rheological properties of the slurry. It was further demonstrated that the resultant hydrolysate, namely, reducing sugars, could be cross-linked with soy protein, based on the thermogravimetric analyses, Fourier-transform infrared spectroscopy, atomic force microscopy nanomechanical mapping, and sol-gel tests. With the self-cross-linked structure, the enzyme-treated soy adhesive had significantly improved adhesive strength and water resistance as compared to that without the enzymatic hydrolysis. Particularly, the wet bonding strength of two-layer plywood increased by over 30%, showing great potential for preparing all-biomass composite materials in an industrial scale.
Keyword ：
All-biomass composite All-biomass composite Aspergillus niger Aspergillus niger Enzyme broth Enzyme broth Self-cross-linked Self-cross-linked Soy adhesive Soy adhesive
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| GB/T 7714 | Zheng, Peitao , Chen, Nairong , Islam, S. M. Mahfuzul et al. Development of Self-Cross-Linked Soy Adhesive by Enzyme Complex from Aspergillus niger for Production of All-Biomass Composite Materials [J]. | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2019 , 7 (4) : 3909-3916 . |
| MLA | Zheng, Peitao et al. "Development of Self-Cross-Linked Soy Adhesive by Enzyme Complex from Aspergillus niger for Production of All-Biomass Composite Materials" . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING 7 . 4 (2019) : 3909-3916 . |
| APA | Zheng, Peitao , Chen, Nairong , Islam, S. M. Mahfuzul , Ju, Lu-Kwang , Liu, Jing , Zhou, Jianhui et al. Development of Self-Cross-Linked Soy Adhesive by Enzyme Complex from Aspergillus niger for Production of All-Biomass Composite Materials . | ACS SUSTAINABLE CHEMISTRY & ENGINEERING , 2019 , 7 (4) , 3909-3916 . |
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Abstract ：
本发明属于木材胶黏剂技术领域，具体涉及一种自然发酵胶黏剂及其制备方法。所述一种自然发酵胶黏剂，原料包括以下组分：按重量份计，蛋白原料200‑1000份、酸35‑150份、碱45‑180份、盐类0.5‑6份、维生素0.1‑0.6份、水1000‑5000份。将蛋白原料与水混合，搅拌；加入盐类，继续保温搅拌；以酸、碱调节pH；再加入维生素；在25℃，密闭于耐压容器中发酵，释放压力，获得自然发酵的胶黏剂；本发明胶黏剂无甲醛等有毒有害物质释放，环保性能好；可采用滚涂或喷涂等方式施胶；胶黏剂中活性官能团多，特别是羧基含量高，固化后耐水性好；在160℃，1min/mm，1.0MPa条件下压制的3层马尾松胶合板的胶合强度可达到GB/T9846‑2014中II类胶合板的要求。
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| GB/T 7714 | 陈奶荣 , 殷豪 , 张二兵 et al. 一种自然发酵胶黏剂及其制备方法 : CN201910152847.4[P]. | 2019-02-28 . |
| MLA | 陈奶荣 et al. "一种自然发酵胶黏剂及其制备方法" : CN201910152847.4. | 2019-02-28 . |
| APA | 陈奶荣 , 殷豪 , 张二兵 , 彭志翔 , 陈麦全 , 程生媛 et al. 一种自然发酵胶黏剂及其制备方法 : CN201910152847.4. | 2019-02-28 . |
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