Izici zobuchwepheshe bokushisa obuphakeme be-hydroxypropyllylylylylylyllose

I-Hydroxypropyl methylcellulose (HPMC)Ingabe impahla ebalulekile yamakhemikhali, esetshenziswa kabanzi ezintweni zokwakha, umuthi, ukudla kanye nezinye izinkambu. Ikakhulu embonini yezokwakha, i-HPMC isetshenziswa kabanzi ngenxa yokusebenza kwayo okuhle kakhulu. Ubuchwepheshe bokushisa okuphezulu budlala indima ebalulekile ekukhiqizweni nasekusetshenzisweni kwe-HPMC.

1. Iqhaza lobuchwepheshe obuphakeme bokushisa ku-HPMC

I-Productionhydroxypropyllylylylys itholakala ngochungechunge lokuphendula kwamakhemikhali njenge-alkalization kanye nokuthezeka kwe-cellulose yemvelo. Ubuchwepheshe obukhulu bokushisa busetshenziswa ikakhulukazi ekuchithweni, esomisiwe kanye nokubumba izigaba zenqubo yokusabela. Ukwelashwa okushisa okuphezulu akunakusheshisa kuphela isilinganiso sokuphendula, kepha futhi kuthuthukisa ubumsulwa nokuqina komkhiqizo.

Ukusebenza okuthuthukile kokuphendula

Ngaphansi kwezimo zokushisa eziphakeme, izinga lokuphendula le-cellulose ne-sodium hydroxide liyashesha, elikhuthaza ukunqwabelana kwe-hydroxypropyl kanye ne-methyl reateres ngaphakathi kwama-molecule we-cellulose, ngaleyo ndlela kuthuthukise izinga le-HPMC.

Susa ukungcola

Imvelo yokushisa ephezulu ingasusa ngempumelelo imikhiqizo eyenziwe ngempumelelo ngesikhathi sokusabela, njengesixazululo se-alkali esingafundile futhi solvent, futhi sithuthukise ubumsulwa be-HPMC.

Ukusebenza kahle komoya

Ngesikhathi senqubo yokumisa amazinga okushisa, umswakama we-HPMC uvele ngokushesha, ugweme umkhiqizo kusuka ku-agglomerating noma ekulweni namazinga okushisa aphansi, kanye nokwenza ngcono ukuqina nokusebenza kokusebenza komkhiqizo.

2. Umthelela wobuchwepheshe obuphakeme bokushisa ngokusebenza kwe-HPMC

Ubuchwepheshe obuphakeme bokushisa buhlale buthinta kuphela ukwakheka kwe-HPMC, kepha futhi kunomthelela omkhulu kwizakhiwo zayo zamakhemikhali kanye nemiphumela yohlelo lokusebenza.

Ukulungiswa kwe-Viscosity

Inqubo yokushisa ephezulu ingakwazi ukulawula ngempumelelo ukusatshalaliswa kwesisindo kwe-HPMC, ngaleyo ndlela kuguqule ukubonakala kwayo. Amazinga okushisa aphezulu asiza ukunciphisa amathuba okuphuka kwe-molecular chain, okwenza ukubonwa kwe-HPMC kusisombululo esinamanzi ezinzile.

Ukuvikelwa Ukushisa Okushisiwe

Ukuqina okushisayo kwe-HPMC kuthuthukiswa kakhulu ngokwelashwa okushisa okuphezulu. Ekwakhiweni kodaka kanye nama-tile anamathela, i-hpmc isengakwazi ukugcina ukunamathela okuhle nezindawo zokulwa namazinga ngaphansi kwezimo zokushisa eziphakeme.

I-solubity ethuthukisiwe

Ngesikhathi senqubo yokumisa amazinga okushisa aphezulu, i-MicrossCreacture ye-HPMC yenziwe kahle, okwenza kuncibilike kakhulu emanzini abandayo. Ikakhulu ezindaweni zokwakha eziphansi zokushisa, i-hpmc ingancibilika ngokushesha futhi yakha isixazululo se-colloidal eyunifomu.

3. Ukusetshenziswa okukhethekile kobuchwepheshe obuphakeme bokushisa kwinqubo yokukhiqiza ye-HPMC

Isigaba Sokuphendula Ukuphendula

Ngokwenza ukusabela okuthe xaxa ekushiseni okuphezulu kwe-80-100 ° C, ukusabela kokumiswa kwe-Hydroxypropyl kanye ne-methyls kungasheshiswa, ukuze i-HPMC inesilinganiso esiphakeme sokufaka esikhundleni kanye nokuqina okungcono.

Ukumiswa nokuchoboza isigaba

Ubuchwepheshe bokomisa komoya oshisayo ngenhla kwe-120 ° C abakwazi ukukhipha umswakama kuphela, kepha futhi vimbela i-HPMC powder kusuka ku-agglomerating ngesikhathi senqubo yomiswa. Kamuva, kusetshenziselwa ubuchwepheshe bokushisa okuphezulu kakhulu benziwa ukwenza izinhlayiya ze-HPMC Powder ezintekenteke futhi ziyunifomu, kanye nokungafani komkhiqizo kuyathuthuka.

Ukwelashwa okushisa okuphezulu kwelashwa

Lapho i-HPMC isetshenziswa ezintweni zokwakha noma embonweni, ukwelashwa okuphezulu kokulashwa kungathuthukisa ukumelana kwayo kokuqhekeka, ukumelana nokukhula kwamanzi nokusebenza kokugcinwa kwamanzi, ukuqinisekisa ukusebenza okuhle kokwakhiwa.

I-4. Izinzuzo zobuchwepheshe obuphakeme bokushisa ezinhlelweni zohlelo lokusebenza lwe-HPMC

Izinto zokwakha

Ngaphansi kwemvelo yokushisa ephezulu, i-HPMC ikhombisa ukuqina okuhle nokugcinwa kwamanzi ngodaka no-putty powder, ukuvimbela udaka ngowonakalisi ngokushesha nokuqhekeka.

Umkhakha Wokupenda

I-HPMC Synthessised ngokushisa okuphezulu inemiphumela emihle yokulinganisa futhi i-anti-sagging e-Latex Paint, ethuthukisa ukumelana nokugqoka ukumelana kwenhlanganisela.

Imboni yezemithi

Ubuchwepheshe obukhulu bokushisa bungathuthukisa ukufana kwe-HPMC ekubambeni kwezidakamizwa futhi baqinisekise ukuqina kwezidakamizwa ezilondolozwe izidakamizwa.

Ukusetshenziswa kobuchwepheshe bokushisa okuphezulu kwehydroxypropyl methylcelluloseAkugcini nje ngokuthuthukisa ukusebenza kahle kokukhiqiza, kepha futhi kuthuthukisa ukusebenza komkhiqizo. Ngokusebenzisa inqubo ephezulu yokushisa, i-viscosity, i-solubility kanye nokuqina okushisayo kwe-HPMC kulungiselelwe kakhulu, okwenza kube nethemba lesicelo ebanzi emikhakheni yokwakha, ukumboza kanye nemithi. Ngokuzayo, nokuqamba okusha okuqhubekayo kobuchwepheshe obuphakeme bokushisa, ukusebenza kwe-HPMC kuzothuthukiswa ngokwengeziwe, okwenza iminikelo enkulu ekuthuthukisweni kwezinto eziluhlaza eziluhlaza kanye nemvelo.