Amakuru

Hydroxypropyl methylcellulose – sima y'amabuye Ongera uburyo amazi afatanye n'ubuso bw'amabuye, kandi wongere ubushobozi bwo kubika amazi, kugira ngo imbaraga za sima zirusheho kuba nziza. Kunoza uburyo bwo gukoresha sima no kuyitunganya kugira ngo irusheho kuba nziza, koroshya kuyikoresha bikagabanya igihe kandi bikanoza...Soma byinshi»

Cellulose hydroxypropyl methyl ether ikorwa muri cellulose y'ipamba nziza cyane binyuze mu buryo bwihariye bwo gushyushya amazi mu gihe cy'ubushyuhe bwa alkaline. Ingaruka: 1. Inganda z'ubwubatsi: Nk'ikintu gifata amazi kandi kigabanya ubushyuhe bwa sima, gishobora gutuma ubushyuhe bushobora kuvomwa. Muri plaster, gypsum, putty powder cyangwa...Soma byinshi»

1. Ubushyuhe bwa jeli (0.2% by'umuti) 50-90°C. 2. Ishongesha mu mazi no mu gice kinini cya polar c n'igipimo gikwiye cya ethanol/amazi, propanol/amazi, dichloroethane, nibindi, ntishongesha muri ether, acetone, ethanol yuzuye, hanyuma ikabyimba ikagera mu gisubizo cya colloidal cy'amazi akonje. Amazi ...Soma byinshi»

MC ni methyl cellulose, ikorwa muri eteri ya cellulose binyuze mu gutunganya ipamba itunganyijwe na alkali, hakoreshejwe methane chloride nk'ikintu gitanga eteri, kandi ikanyura mu buryo butandukanye. Muri rusange, urwego rwo gusimbuza ni 1.6 ~ 2.0, kandi gushonga nabyo biratandukanye bitewe n'ibipimo bitandukanye ...Soma byinshi»

Hydroxypropyl methylcellulose yo mu rwego rwa buri munsi ni polymeri ikoze mu ipamba rya cellulose karemano binyuze mu guhindura etherification. Cellulose ether ni ikomoka kuri cellulose karemano. Ikorwa rya cellulose ether ritandukanye na polymeri zikoze. Ni polymeri y'ibanze cyane...Soma byinshi»

Kongeramo hydroxypropyl methylcellulose kugira ngo ikore ifu ya putty, ubukana bwayo ntabwo bworoshye kuyigira nini cyane, bunini cyane butera gukora nabi, none se ubukana bwa hydroxypropyl methylcellulose ku ifu ya putty bungana iki bukenewe? Reka tubisesengure kuri buri wese. Ni byiza kongeramo hydroxypropyl methylc...Soma byinshi»

Mu gishishwa cya sima n'igishishwa gishingiye kuri gypsum, hydroxypropyl methylcellulose igira uruhare mu kubika amazi no kuyakomeza, kandi ishobora kunoza neza uburyo igishishwa gifatana n'ubudahangarwa bwacyo. Ibintu nk'ubushyuhe bw'umwuka, ubushyuhe n'umuvuduko w'umuyaga bigira ingaruka ku ihindagurika ry'ikirere...Soma byinshi»

1. Ibibazo bikunze kugaragara mu ifu ya putty Kumisha vuba: Ibi biterwa ahanini n'ingano y'ifu ya kalisiyumu y'indimu yongewemo (ni nini cyane, ingano y'ifu ya kalisiyumu y'indimu ikoreshwa muri putty ishobora kugabanuka neza) bifitanye isano n'igipimo cyo kubika amazi muri fibre, kandi bifitanye isano n'uburyo ...Soma byinshi»

Ifu yumutse vuba Ibi biterwa ahanini no kongeramo ifu ya kalisiyumu y'ivu (ingano y'ifu ya kalisiyumu y'ivu ikoreshwa muri formula ya putty ishobora kugabanuka uko bikwiye) bifitanye isano n'igipimo cyo kubika amazi cya hydroxypropyl methylcellulose, kandi bifitanye isano no kuma k'urukuta. Gukuramo...Soma byinshi»

Hydroxypropyl methylcellulose ni ether ya cellulose idafite ionic itunganywa mu ipamba itunganyijwe binyuze mu buryo butandukanye bw'ibinyabutabire. Ni ikintu cy'umweru kidafite impumuro, kidahumanya, gishonga mu mazi kigatanga umuti wa colloidal usobanutse neza cyangwa ufite ibicu bike. Ifite imiterere ya t...Soma byinshi»

Izina ry'Igishinwa rya HPMC ni hydroxypropyl methylcellulose. Ntabwo ari ionic kandi ikunze gukoreshwa nk'ikintu kibungabunga amazi mu cyuma cyumye. Ni cyo gikoreshwa cyane mu kubika amazi mu cyuma. Ni ikintu gikomoka kuri polysaccharide gikozwe muri alkalizing na etherification. Nta...Soma byinshi»

1. Ibibazo bikunze kugaragara mu ifu ya putty yumuka vuba Ibi bifitanye isano ahanini n'ingano y'ifu ya kalisiyumu y'ivu yongewemo (ni nini cyane, ingano y'ifu ya kalisiyumu y'ivu ikoreshwa muri formula ya putty ishobora kugabanuka uko bikwiye) hamwe n'igipimo cyo kubika amazi cya hydroxypropyl methylcellulose (HPMC), kandi nanone...Soma byinshi»