Focus on Cellulose ethers

Kini iyato laarin hydroxypropyl starch ether (HPS) ati hydroxypropyl methylcellulose (HPMC)?

Ni ode oni, ọpọlọpọ eniyan ko mọ pupọ nipa hydroxypropyl starch ether. Wọn ro pe iyatọ diẹ wa laarin hydroxypropyl starch ether ati sitashi lasan, ṣugbọn kii ṣe bẹ. Hydroxypropyl sitashi ether ni a lo ni iye diẹ ninu awọn ọja amọ-lile, ati iye ti a ṣafikun ti agbegbe pola le ṣe aṣeyọri awọn ipa didara to dara.

Hydroxypropyl sitashi ether (HPS) jẹ lulú itanran funfun ti a gba lati inu awọn ohun ọgbin adayeba bi awọn ohun elo aise, ti a ṣe atunṣe, etherified pupọ, ati lẹhinna fun sokiri, laisi awọn ṣiṣu ṣiṣu. O yatọ patapata si sitashi lasan tabi sitashi ti a ṣe atunṣe

Hydroxypropyl methyl cellulose, tun mo bi hypromellose ati hydroxypropyl methyl pupa Vitamin ether, ti wa ni ṣe ti gíga funfun owu cellulose bi aise ohun elo, ti a mu pẹlu lye ni 35-40°C fun idaji wakati kan, squeezed , awọn cellulose ti wa ni pulverized, ati awọn ti ogbo ni bojumu ni 35 ° C, ki iwọn apapọ ti polymerization ti okun alkali ti o gba wa laarin iwọn ti a beere. Fi okun alkali sinu kettle etherification, ṣafikun propylene oxide ati methyl chloride ni ọkọọkan, etherify ni 50-80 ° C fun awọn wakati 5, ati pe o pọju titẹ jẹ nipa 1.8MPa. Lẹhinna ṣafikun iye ti o yẹ ti hydrochloric acid ati oxalic acid si omi gbona ni 90 ° C lati wẹ ohun elo naa lati faagun iwọn didun, lẹhinna gbẹ rẹ pẹlu centrifuge, ati nikẹhin wẹ leralera si didoju. Ti a lo jakejado ni ikole, ile-iṣẹ kemikali, kikun, oogun, ile-iṣẹ ologun ati awọn aaye miiran, ni atele bi oluranlowo fiimu, binder, dispersant, stabilizer, thickener, bbl

Hydroxypropyl sitashi ether le ṣee lo bi adapo fun awọn ọja orisun simenti, awọn ọja orisun gypsum ati awọn ọja kalisiomu orombo wewe. O ni ibamu ti o dara pẹlu awọn admixtures ile miiran. Ti a lo pẹlu hydroxypropyl methylcellulose ether HPMC, o le dinku iwọn lilo ti hydroxypropyl methylcellulose (ni gbogbogbo fifi 0.05% ti HPS le dinku iwọn lilo HPMC nipasẹ 20%-30%), ati pe o le ṣe ipa ti o nipọn. Nse ti abẹnu be, dara kiraki resistance ati ki o dara workability.


Akoko ifiweranṣẹ: Oṣu Kẹrin Ọjọ 13-2023
WhatsApp Online iwiregbe!