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2.3. Characterization
The Fourier transform-infrared (FTIR) spectrum was obtained from a MAGNA 560 FTIR spectrometer (Thermo Nicolet Corporation, USA) using KBr discs in the range from 4000 cm−1 to 400 cm−1. Scanning electron microscopy (SEM) images were obtained using a FEI QUANTA 200 microscope. The swollen resin hydrogel were frozen in liquid nitrogen and immediately snapped and freezedried. The fractured surface of the resin hydrogel was observed.
Differential scanning calorimetry (DSC) was done using a DSC2004 heat flux differential scanning calorimeter (NETZSCH, Germany) at a temperature range from 293 K to 773 K with a heating rate of 10 K/min and an argon gas flow at 40 mL/min.
2.4. Swelling and absorbency of resins in chloride and pH buffer
Solutions NaCl, CaCl2, and AlCl3 solutions were prepared at different concentrations (0.1 mol/L, 0.05 mol/L, and 0.01 mol/L), where 0.1 g of
the resin products was mixed with 200 mL of each salt solution. The water absorbency was measured. Buffer solutions with pH values of 2, 4, 6, 8, 10, and 12 were prepared, where 0.1 g of the resin was mixed with 200 mL of the buffer solution at different pH values. After saturation, filtered and weighed, the hydrogel characteristics were determined, and the absorbency was calculated.
2.5. Determination of biodegradability Resin sheets measuring 1 cm × 2 cm were weighed and labeled separately. The sheets were then placed in 18 PDA plates containing mycete (six plates each of Penicillium, A. niger, and L. edodes), sealed with tape, and incubated at 30 ◦C. Afterwards, the resin products were filtered, dried, weighed, and the biodegradation was observed
every 3 days.

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1樓 2014-11-04 10:11:52

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2.3. 表征
傅里葉變換紅外（FTIR）光譜用MAGNA 560 FTIR光譜儀（Thermo Nicolet 公司，美國(guó)）獲得，KBr壓片的使用范圍為4000/厘米〜400/厘米。用FEI QUANTA 200顯微鏡獲得掃描電子顯微鏡（SEM）圖像。溶脹樹脂的水凝膠冷凍在液氮中，并立即折斷和冷凍干燥。觀察到樹脂的水凝膠有斷裂面。用DSC2004熱通量差示掃描量熱計(jì)（NETZSCH，德國(guó)）在溫度范圍從293K到773 K、加熱速率為10K/min、氬氣流量為40毫升/分鐘條件下得到差示掃描量熱（DSC）。
2.4. 樹脂在氯化物和pH緩沖液中的溶脹和吸水性
制備不同濃度（0.1摩爾/升，0.05摩爾/升和0.01摩爾/升）的氯化鈉，氯化鈣，和氯化鋁溶液，將0.1克樹脂制品與200ml各種鹽溶液混合。測(cè)定吸水性。制備pH值為2，4，6，8，10，和12的緩沖液，將0.1可樹脂與200mL具有不同pH值的緩沖溶液混合。飽和后，過濾并稱重，確定所述水凝膠的特性，并計(jì)算吸水率。
2.5. 樹脂生物降解性的測(cè)定
取1厘米×2厘米大小的樹脂片材，分別稱重并標(biāo)記。然后將片材置于含有霉菌的18 PDA平板（青霉屬，黑曲霉，和香菇各6個(gè)平板），用膠帶密封，并在30℃保溫。然后，將樹脂產(chǎn)物過濾，干燥，稱重，并每3天觀察其生物降解情況。

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2樓2014-11-04 11:23:29

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