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| Practice of Flipped Classroom in Comprehensive Experimental Teaching of Vegetable Fibers |
Yi YANG( ), Jun YE, Shenglong WU(), Wanfen HE |
| School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China |
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Abstract This comprehensive experimental teaching of vegetable fibers aimed to train innovative talents, and involved the idea of flipped classroom by evaluating feasibility of paper making of Hani rice straw and Guangdong rice straw. The undergraduate students analyzed the chemical components and physicochemical properties of the pulps according to the national standards and investigated the chemical structures and usability of the hand sheets by modern testing methods. The comprehensive experimental teaching experienced to transform from the simple operation training model to designing and exploring teaching model. Personalized development of the students was encouraged and supported. Their curiosities and interests were explored. Their innovation abilities were trained through succession, querying consciousness, practicalness and risk and so on.
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Received: 01 August 2016
Published: 10 July 2017
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| 漂白工艺参数 | 数量 | | P段 | H段 | | 浆浓/% | 10 | 8 | | 温度/°C | 80 | 42 | | 药用量/% | 4 | 8 | | 有效氯含量/(g·L-1) | — | 21.68 | | 有效H2O2含量/(g·L-1) | 32.32 | — | | 时间/min | 60 | 90 |
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| 项目 | 哈尼稻杆 | 广东稻杆 | | 水分 | 8.80±0.1 | 9.31±0.1 | | 灰分 | 12.29±0.1 | 14.62±0.1 | | 聚戊糖 | 19.58±0.3 | 27.08±0.3 | | 综纤维素 | 69.28±0.3 | 64.28±0.3 | | 抽出物: | | | 苯醇抽出物 | 3.43±0.2 | 4.48±0.2 | | 1%氢氧化钠碱抽提 | 0.55±0.01 | 0.52±0.01 | | 木素: | | | 酸不溶木素 | 14.9±0.1 | 12.2±0.1 | | 酸溶木素 | 0.64±0.01 | 0.78±0.01 |
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| 材料 | 数量平均
长度/cm | 质量平均
长度/cm | 一般范围/
cm | 数量平均
宽度/μm | 质量平均
宽度/μm | 一般范围/
μm) | 长宽比 | | 哈尼稻杆 | 1.01 | 1.08 | 0.46~2.22 | 9 | 10 | 5~18 | 112 | | 广东稻杆 | 0.54 | 0.57 | 0.30~0.9 | 10 | 11 | 4~23 | 54 |
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| 实验原料 | H Cell | G Cell | | 水分 | 4.48±0.1 | 4.96±0.1 | | 灰分 | 0.18±0.01 | 0.21±0.01 | | 二氯甲烷抽出物(%) | 0.41±0.02 | 0.46±0.02 | | 碱溶度: | | | | S10 | 10.3±0.2 | 14.0±0.2 | | S18 | 8.0±0.2 | 10.2±0.2 | | 抗碱度: | | | | R10 | 89.6±0.2 | 86.0±0.2 | | R18 | 91.9±0.2 | 89.6±0.2 |
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| 样品 | [η] | | DP | | 哈尼稻杆浆 | 148 | 51 528 | 286 | | 广东稻杆浆 | 118 | 40 178 | 223 |
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| 性能参数 | 哈尼稻杆浆 | 广东稻杆浆 | | 定量/(g·m-2) | 54.0 | 56.6 | | 打浆度/°SR | 44 | 42 | | 光泽度/GU | 5.2 | 4.8 | | 不透明度/% | 84.61 | 84.68 | | 抗张指数/(N·m·g-1) | 45.18 | 41.30 | | 白度/% | 73.91 | 69.47 | | 撕裂度/mN | 149 | 127 | | 耐破指数/(kPa·m2·g-1) | 2.67 | 2.12 | | 弯曲挺度/mN | 75 | 70 |
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2017, Vol. 36 
