The preparation of dissolved liquid crystal of chitosan grafted polylactic acid includes vacuum deairing of chitosan for 1 hr, charging nitrogen, adding toluene as dispersant, dripping toluene solution of aluminium ethide as catalyst in 1-3 molar times of chitosan, ring opening polymerization of lactide inside solution to produce grafted copolymer of chitosan and polylactic acid.
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nitrogen charging group 充氮装置组件
nitrogen charging procedure 充氮步骤
nitrogen charging equipment 充氮设备
nitrogen charging group connection 充氮装置组件连接
Drain the oil before demount accumulator. First let out the nitrogen with the charging device, then the parts can be demounted.
卸下蓄能器前必须卸去压力油，使用充气工具放掉皮囊中的氮气，然后才能拆下各零部件。
If it has large charging requirements, please adjust nitrogen outlet flow, slowly pause in the charging operation and regulate the sealing speed at the same time.
若需充气量大，请调整氮气出口流量，在充气操作时稍作停顿缓行即可，封口速度也可自行调节。
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