Focus on Cellulose ethers

Kini ilana iṣelọpọ etherification ti hydroxypropyl methylcellulose?

Hydroxypropyl methylcellulose ni a lo bi sobusitireti ohun elo aise lati ṣe epo, eyiti o le mọ lilo gaari lapapọ, mu iwọn lilo ti awọn ohun elo aise dara, dinku iye to ku ti sobusitireti ninu broth bakteria, ati dinku idiyele itọju omi idọti. Yi hydroxypropyl methylcellulose Awọn abuda akọkọ jẹ itọsi si iṣapeye ti ipele, ifunni-ipele ati awọn ilana bakteria lemọlemọfún, yago fun lẹsẹsẹ awọn iṣoro bii iṣakoso ti akopọ alabọde ati oṣuwọn dilution; o tun jẹ itara si ilana ilana ilana bakteria.

Hydroxypropyl methylcellulose, cellulose ohun elo aise, le jẹ owu ti a ti mọ tabi ti ko nira igi. O jẹ dandan lati fọ o ṣaaju ki o to alkalization tabi nigba alkalization. Awọn fifun pa ni lati run ohun elo aise cellulose nipasẹ agbara ẹrọ. Eto ipinlẹ apapọ ti awọn macromolecules cellulose le dinku iwọn ti crystallinity ati polymerization, mu agbegbe dada rẹ pọ si, nitorinaa imudarasi iraye si ati agbara ifaseyin kemikali ti reagent ifaseyin si awọn ẹgbẹ hydroxyl mẹta lori ẹgbẹ oruka glukosi ti macromolecule cellulose.

Botilẹjẹpe ilana iṣelọpọ ti etherification ti hydroxypropyl methylcellulose ko ni idiju, ọpọlọpọ awọn agbegbe ti alkalization, fifọ ohun elo aise, etherification, imularada epo, ipinya centrifugal, fifọ ati gbigbẹ jẹ nọmba nla ti awọn imọ-ẹrọ bọtini ati awọn itumọ oye ọlọrọ. Fun awọn oriṣiriṣi awọn ọja, agbegbe kọọkan ni awọn ipo iṣakoso tuntun, gẹgẹbi iwọn otutu, akoko, titẹ ati iṣakoso ṣiṣan ohun elo. Ohun elo iranlọwọ ati awọn ohun elo iṣakoso jẹ awọn iṣeduro ọjo fun didara ọja iduroṣinṣin ati awọn eto iṣelọpọ igbẹkẹle.

Niwọn igba ti iṣẹ ti hydroxypropyl methylcellulose jẹ iru si awọn ethers miiran ti omi-tiotuka, o le ṣee lo bi oluranlowo fiimu, ti o nipọn, emulsifier ati imuduro ni awọ latex ati awọn ohun elo kikun resini ti omi-tiotuka.

Ṣe awọn ti a bo fiimu ni ti o dara yiya resistance, ipele ati adhesion, ki o si mu awọn dada ẹdọfu, iduroṣinṣin to acid ati alkali, ati ibamu si ti fadaka pigments. Hydroxypropyl methylcellulose ni ipa ti o dara bi ohun ti o nipọn fun awọ polyvinyl acetate ti o da lori omi funfun. Iwọn iyipada ti ether cellulose ti pọ si, ati pe resistance si ogbara kokoro arun tun ni ilọsiwaju.


Akoko ifiweranṣẹ: Oṣu Kẹta-17-2023
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