Kodi zida zophika za HPMC ndi ziti?

Hydroxypropyll Methylcellulose (hpmc) ndi polima wowonda kwambiri wokhala ndi mapulogalamu osiyanasiyana m'mafakitale osiyanasiyana, kuphatikizapo zamankhwala osiyanasiyana, kuphatikizapo za mankhwala osiyanasiyana, kuphatikiza, chakudya, ndi zodzola. Zida zopangira zomwe zimagwiritsidwa ntchito popanga hpmc zimachokera ku zachilengedwe komanso zokonzanso.

HPMC ndi chotupa cham'madzi cham'madzi, polymer yachilengedwe imapezeka mu khoma la cell. Zida zopangira zopangidwa ndi HPMC zimaphatikizapo ma cellulose ndi ma propyd oxide. Zipangizo zopangira ndi kapangidwe kake zimafotokozedwa mwatsatanetsatane pansipa:

1. Cellulose:

Source: Zopangira zazikulu za HPMC ndi cellulose, yomwe imachotsedwa ku mitengo yamitengo kapena koloko fiber. Pulp Plpp ndi gwero lodziwika bwino chifukwa cha kuchuluka kwake ndi mphamvu yake.
Kupatukana: Kulekanitsa Cellulose ku zinthu zopangira pogwiritsa ntchito njira zosiyanasiyana zamankhwala. Pulp zamkati zimathandizidwa kuti zichotse zodetsa ndikuchotsa ma cellulose.

2. Mapulogalamu oxide:

Source: Progyyne oxide ndi gawo lofunikira pakupanga hpmc ndipo limachokera ku proplene, petrochemical yomwe idapezeka panthawi yamafuta oyenerera.
Kupanga: Propyyne oxide nthawi zambiri kumapangidwa kudzera mu mankhwala otchedwa chlorohydrins kapena epoxidation. Munjira iyi, Prodeyne adakumana ndi chlorine kapena hydrogen peroxide kuti apange ma probynes.

3. Intylation

Kusintha: kapangidwe ka HPMC kumafuna kusinthika kwa cellulose ndi ma propsyne oxide. Izi zimatchedwanso methylation, pomwe magulu a hydroxypyl amayambitsidwa m'matumbo am'madzi a cellulose.
Chithandizo cha alkali: Kuchitira cellulose ndi alkali (nthawi zambiri sodium hydroxide) kuyambitsa magulu a hydroxyl. Izi zimawapangitsa kuti azichita zogwira ntchito mopitirira muyeso ndi ma propylene oxide.

4. Kuchuluka kwa methylation:

Kuwongolera: kuwongolera digiri ya methylation (DS) pakuchita zomwe mukufuna ku HPMC. Mlingo wazolowa zomwe zimakhudza kusungunuka, mamasukidwe, ndi zina zomaliza.
Hydroxypylaty:

Kuchita: Cellulose yoyambitsidwa imachitikanso ndi ma propyne oxide pansi. Izi zimabweretsa m'malo mwa magulu a hydroxypyl m'mphepete mwa ma cellulose.
Kutentha ndi kupanikizika: Kuletsa mosamala, kuphatikizapo kutentha ndi kukakamizidwa, kuonetsetsa kuti njira ndi yabwinobwino.

5. Kusanja ndi kuchapa:

Asidi wa asidi: Pambuyo pochita, mankhwalawo salowerera ndale kuti achotse pansi.
Kusamba: HPMC imatsukidwa kuti muchotse zodetsa, zinthu zosasinthika, komanso zopangidwa ndi zinthu. Izi ndizofunikira kuti mupeze zopukutira kwambiri.

6. Kuyanika:

Kuchotsa madzi: Gawo lomaliza ndikupukuta hpmc kuti muchotse chinyontho chilichonse chotsalira. Izi zimapanga HPMC mu ufa wa ufa, womwe umatha kukonzedwa ndikugwiritsidwa ntchito m'njira zosiyanasiyana.

Zipangizo zopangira za HPMC zimaphatikizapo maseloji kuchokera ku progg zamkati kapena fibern fiber ndi ma propylene oxide omwe achokera ku PETrochemical Proside. Njira yophatikizira imaphatikizapo methylation, hydroxypropylaty, osalowerera, kuchapa ndi kuyanika, ndipo zomwe zichitika zimayendetsedwa mosamala kuti tipeze zomwe mukufuna. Zosiyanasiyana za HPMC zimayambira kuchokera papangidwe kwake yapadera ya mankhwala, ndikupangitsa kukhala chofunikira chofunikira pazogulitsa zosiyanasiyana.