Kupanga hydroxyethyl cellulose (hec) kumaphatikizapo kusintha mitundu ingapo yosintha cellulose, chilengedwe chachilengedwe chochokera kuzomera. Hec imagwiritsidwa ntchito kwambiri mafakitale osiyanasiyana, kuphatikizapo mankhwala odzola, zodzoladzola, chakudya, ndi zomanga, chifukwa chokhazikika, komanso kukhazikika kwa madzi.
Kuyamba kwa Hydroxyethyl cellulose (hec)
Hydroxyethyl cellulose (hec) ndiopanda poizoni, kusungunuka police-madzi wochokera ku cellulose pogwiritsa ntchito mankhwala. Amagwiritsidwa ntchito ngati kukula, kuphatikiza, komanso kukhazikika kwa mafakitale osiyanasiyana.
Zida zogwiritsira ntchito
Cellulose: Zinthu zoyambirira zopangira HeC. Cellulose amatha kupangidwa kuchokera ku zinthu zosiyanasiyana zopangidwa ndi mbewu monga nkhuni zamkati, thonje, kapena zotsalira zaulimi.
Ethylene oxide (eo): Mankhwala ofunikira omwe amagwiritsidwa ntchito kuyambitsa ma hydroxyethyl magulu a ma hydroxyathyl kickbone.
Alkali: Nthawi zambiri sodium hydroxide (Naoh) kapena potaziyamu hydroxide (Koh) imagwiritsidwa ntchito ngati chothandizira pochita.
Kupanga
Kupanga kwa hec kumaphatikizapo kusinthika kwa cellulose ndi ethylene oxide pansi pa milkaline.
Zolemba zotsatirazi zimafotokoza izi:
1. Chithandizo cha cellulose
Te cellulose imayeretsedwa koyamba kuti ichotse zodetsa ngati Ligmin, Himillilose, ndi zowonjezera zina. Cellulose yoyeretsedwa ikuuma kukhala chinyezi.
2.
Kukonzekera kwa Alkaline Solution: The Aquaus yankho la sodium hydroxide (Naoh) kapena potaziyamu hydroxide (koh) yakonzedwa. Kukhazikika kwa njira ya alkali ndikofunikira ndipo akuyenera kuthandizidwa potengera digiri yofunikira (DS) yomaliza.
Kukhazikitsa: Cellulose yoyeretsedwa imabalalitsidwa mu njira ya alkali. The osakaniza amatenthedwa kutentha, makamaka pafupifupi 50-70 ° C, kuti apatsidwe cellulose kwathunthu ndipo amapezeka chifukwa cha zomwe akuchita.
Zowonjezera za ethylene oxide (eo): ethylene oxide (eo) imawonjezeredwa pang'onopang'ono ku mbiya pomwe mukusunga kutentha ndikusunthira mosalekeza. Zomwe zimachitikazo ndizochulukitsa, chifukwa chake kuwongolera kutentha ndikofunikira kuti mupewe kutentha.
Kuwunika: Kupita patsogolo kwa zomwe mwachita kumayang'aniridwa ndi kusanthula zitsanzo nthawi zonse. Maluso ngati masinthidwe anayi omwe amaperekedwa Spectroscopy (FTIR) akhoza kugwiritsidwa ntchito kudziwa kuchuluka kwa magulu a hydroxyethyl m'magulu am'madzi a cellulose.
Kusalutsira ndi kuchapa: Kamodzi DS yomwe mukufuna ikwaniritsidwe, zomwe zimachitika ndikusintha njira ya alkaline ndi acid, makamaka acetic acid. Zotsatira zake zimasambitsidwa bwino ndi madzi kuti muchotse zosungunulira ndi zosayera.
3. Kuyeretsa ndi Kuyanika
Msuzi wotsukidwa umayeretsedwanso kudzera mu kusefera kapena centrifigation kuti muchotse zodetsa zilizonse. Msuzi woyeretsedwa umawuma pamtundu wina wonyozeka kuti upeze zomaliza.
Kuwongolera kwapadera
Kuwongolera kwapadera ndikofunikira njira yonse yopanga hec kuti muwonetsetse kuti kusasinthika ndi kuyera kwa chinthu chomaliza. Magawo ofunikira kuti awonetsere kuti aphatikizepo:
Kuchuluka kwa zolowa m'malo (DS)
Kukweza
Zolemba
pH
Kuyera (kusapezeka kwa zosayera)
Njira zowunikira monga Ftir, muyeso wa mafayilo, ndipo kuwunika kwambili kumagwiritsidwa ntchito poyendetsa bwino.
Mapulogalamu a hydroxyethyl cellulose (hec)
Hec imapeza ntchito m'mafakitale osiyanasiyana chifukwa cha zinthu zomwe zili ndi zinthu zina:
Mankhwala opangira mankhwala: ogwiritsidwa ntchito ngati wothandizila wam'mimba, mapangidwe apamwamba, komanso makina operekera mankhwala osokoneza bongo.
Zodzikongoletsera: zomwe zimagwiritsidwa ntchito kawirikawiri m'madzi, zotupa, ndi shampoos ngati thiccener ndi kukhazikika.
Chakudya: Kuwonjezeredwa ndi zakudya ngati kukula ndi chopindika, emulsifier, ndi kukhazikika.
Ntchito Yomanga: Kugwiritsa ntchito matitoni a simenti ndi ma grout kuti athandize kusintha komanso kusungidwa kwamadzi.
Maganizo a chilengedwe ndi chitetezo
Zotsatira za chilengedwe: Kupanga kwa hec kumaphatikizapo kugwiritsa ntchito mankhwala monga ethylene oxide ndi alkalis, omwe amatha kukhala ndi tanthauzo lachilengedwe. Kutsatira zinyalala moyenera komanso kutsatira malamulo ndikofunikira kuti muchepetse mphamvu zachilengedwe.
Chitetezo: Ethylene oxide ndi mpweya wabwino kwambiri komanso woyaka, ndikuyika ziwopsezo zotetezeka panthawi yosungira ndikusungirako. Zabwino kwambiri mpweya wabwino, zoteteza zaumwini (PPE), ndi ma protocols otetezedwa ndikofunikira kuti ateteze ntchito yantchito.
Hydroxyethyl cellulose (hec) ndi polymer yofunika kwambiri yothandiza m'mafakitale ochokera m'mafakitale omanga. Kupanga kwake kumaphatikizapo kusinthika kwa cellulose ndi ethylene oxide pansi pa milkaline. Njira zowongolera zowongolera ndizofunikira kuti zitsimikizire kusasinthika ndi kuyera kwa chinthu chomaliza. Malingaliro achilengedwe ndi chitetezo ayeneranso kufotokozedwa konse. Potsatira njira zoyenera ndi ma protocols, hec imatha kupanga bwino pochepetsa mphamvu ya chilengedwe ndikuonetsetsa kuti agwire ntchito.
Kuwongolera kokwanira kumeneku kumakhudza kupanga hydroxethyl cellulose (hec) mwatsatanetsatane, kuchokera ku zida zopangira bwino kuwongolera komanso kugwiritsa ntchito moyenera za kupanga ndikofunikira kwa polima.
Post Nthawi: Apr-10-2024