Kodi kupanga kwa hydroxyethyl ndi chiyani cellulose?

Hydroxyethyl cellulose (hec) ndi polymer polymer yomwe imagwiritsidwa ntchito kwambiri pobowola mafuta, zomanga, zojambula, zojambula, mankhwala ena. Njira zake zopanga zimaphatikizapo zovuta zamankhwala komanso njira yoyendetsera zinthu.

(1) Kukonzekera Zinthu

Zida zazikulu za hydroxyethyl cellulose ndi kuphatikiza:
Cellulose: Nthawi zambiri amatulutsa ma cellon cellouse kapena mitengo yampuku mitengo imagwiritsidwa ntchito, yomwe imakonzedwa bwino kuti ichotse zosafunikira.
Ethylene oxide: Ino ndiye wothandizila kwambiri womwe umagwiritsidwa ntchito kuyambitsa magulu a hydroxyethyl.
Alkali Solution: Nthawi zambiri nthawi zambiri sodium hydroxide Solution, yomwe imagwiritsidwa ntchito kusinthidwa kwa cellulose.
Zosintha zodzikongoletsera: monga Isoppanol, omwe amagwiritsidwa ntchito kusungunula celloluse ndikupititsa patsogolo.

(2) Njira

Alkization of Cellulose:
Siyani cellulose mu zosungunulira zachilengedwe (monga isoppanol) ndikuwonjezera sodium hydroxide yankho la kupembedza.
Pofuna kutero, ma hydrogen courcer a cellulose amathyoledwa, ndikupanga magulu a hydroxyl ku tenerani mosavuta ndi ethylene oxide.
Njira yoyeserera imachitika nthawi zambiri imachitika pa kutentha kwina (monga 50-70 ° C) ndikupitiliza kwa nthawi yokhala pansi osasangalatsa.
Kutengera Kwakufuna:

Ethyle Coxide imawonjezedwa pang'onopang'ono ku ma cellikali oyikidwa pa cellulose.
Ethynen oxide akumana ndi magulu a hydroxyl pa cellulose kupanga hydroxethyl cellulose.
Kutentha kwamo nthawi zambiri kumachitika pakati pa 50-100 ° C, ndipo nthawi yopanga kumasiyana malinga ndi zomwe mukufuna.
Pakadali pano, zomwe zimachitika (monga kutentha, nthawi, kuchuluka kwa ethylene oxide, etc.) kudziwa kuchuluka kwa mpweya ndi kusungunuka kwa hydroxyethyl cellulose.
Kusintha ndi kuchapa:

Pambuyo pa zomwe zimachitika, asidi (monga Hydrochloric acid) amawonjezeredwa kuti athetse njira yowonjezera ya alkali, ndipo zomwe zimachitika zimatsukidwa kuti zichotse mankhwala osavomerezeka komanso zopangidwa ndi zinthu.
Kusamba nthawi zambiri kumachitika ndi kuchapa madzi, ndipo pambuyo pa kuchapa zingapo, mtengo wa malonda ndi osalowerera ndale.
Kuseza ndi Kuyanika:

Chuma chotsukidwa cha hydroxyethyl chimadutsa mu fyuluta kuti muchotse madzi owonjezera.
Zosavuta zimawuma, nthawi zambiri ndikuwuma kapena kuyanika kwa mpweya wotentha, kuti muchepetse chinyezi.
Zomera zouma zili mu ufa kapena mawonekedwe abwino granule.
Kuphwanya ndi kuwunika:

Chuma chouma cha hydroxethyl chimaphwanyidwa kuti tikwaniritse kukula kwake.

Katundu wosweka amawonetsedwa kuti apeze zinthu zosiyanasiyana kukula kosiyanasiyana kuti akwaniritse zosowa zingapo zofunsira.

Kunyamula ndi kusungira:

Malonda a hydroxyethyl cellulose amasungidwa malinga ndi kufotokozera.

Zinthu zomwe nthawi zambiri zimakhala chinyezi komanso chikwama cha pulasitiki kapena thumba la pepala, kuphatikiza thumba la nsalu kapena carton.

Sungani malo otetezeka, owuma, owuma bwino kuti mupewe chinyezi kapena kuwonongeka kwa kutentha.

(3) Control

Kuwongolera kwapadera ndikofunikira pakupanga hydroxyethyl cellulose. Zimaphatikizapo izi:

Zopangira zopangira bwino: onetsetsani kuti cellulose, ma cellolise, ma ethyle oxide ndi zinthu zina zothandiza kuzikwaniritsa.

Kupanga Njira Zowongolera Zowongolera: Kuwongolera molondola magawo okwanira monga kutentha, kukakamizidwa, nthawi, ndi sH yamtengo wapatali.

Kuyesedwa kwa mankhwala: Yesetsani kuwunika kothandiza, mamasukidwe, kusasinthika, kuyera ndi zisonyezo zina za chinthu chomaliza kuonetsetsa kuti zimakwaniritsa zofunika za makasitomala.

(4) Kuteteza zachilengedwe ndi chitetezo
Kupanga kwa hydroxyethyl cellulose kumaphatikizapo mankhwala monga ma ordic sols ndi ethylene oxide. Kuteteza zachilengedwe ndi chitetezo chitetezero ziyenera kumwedwa pakupanga:

Chithandizo chamadzimadzi: madzi otayika omwe amapangidwa pa nthawi yopanga ayenera kuthandizidwa asanatuluke kuti apewe kuipitsidwa kwa chilengedwe.

Chithandizo cha mpweya: ethylene oxide ndi poizoni komanso woyaka. Mafuta a mchira amafunika kuthandizidwa ndi zida monga mayamwidwe m'malo otentha kuti achepetse kuipitsa mpweya.

Chitetezo cha Chitetezo: Ogwiritsa ntchito amafunika kuvala zida zoteteza kuti apewe kulumikizana ndi mankhwala oyipa. Nthawi yomweyo, malo opangira zopanga ayenera kukhala ndi zida zoteteza moto, kupewa kuphulika kwa kuphulika ndi zida zina zachitetezo.

Kupanga kwa hydroxyethyl cellulose kumaphatikizapo kusintha kwamankhwala angapo komanso njira yoyendetsera zinthu. Kuchokera pakukonzekera kwa Riw kuti mutsirize katundu wa mankhwala, ulalo uliwonse umakhala ndi gawo lofunikira pakuchita ndi mtundu womaliza. Ndi kupititsa patsogolo ukadaulo ndi kusintha kwa zofunikira zachilengedwe, kupanga kwa hydroethyl cellulose ndikusinthanso mosalekeza kuti mupange malonda, kuchepetsa mtengo ndi kuchepetsa mphamvu.