HyDroxypyl Methyl Cellulose Hpmc, a makwaara dị ka hydromomellose, bụ grolu na-acha ọcha na-acha ọcha na-acha odo odo na mgbochi mmiri na-ekpo ọkụ karị na methy cellose. Gydroxyyl otu na otu methy na-eme nke ọma na glucose glucose mgbanaka nke cellulose jikọtara, bụ ụdị mkpụrụ ndụ cellulose agwakọta ether. Ọ bụ senyo na-aga, na-arụ ọrụ, viscoelastic polymerly nke a na-ejikarị dị ka igwe na-egbu egbu na Ophthalmology, ma ọ bụ dị ka ọgwụ ma ọ bụ nke na-enweghị atụ.
1. Usoro mmepụta
Krant pulp na ọdịnaya vissic nke 97%, gersinssic viscosity nke 720ml / g na nkezi Fiber Ogologo na 49% NaEh ngwọta na 40 ℃ maka sekọnd iri ise. Mgbe ahụ, e wepụrụ pulp iji wepu ngafe 49% naeh ngwọta iji nweta alkali cellulose. Ikike dị elu nke (49% na seh eah eah) ruo (akụrụngwa siri ike nke pulp) na nzọ dị na alkali cellulose siri ike na pulp bụ 1.49. A na-enwe ike inweta (20kg) ka a na-etinye ya na mmetụ ahụ na-eji mmegharị ahụ, wee kpochapụ ma kpochaa Nitrogen ruo na wepụ oxygy site na ihe. Mgbe ahụ, a na-achịkwa ọnọdụ okpomọkụ na ihe a na-achịkwa na 60 ℃ ebe a na-eme ka nduhie dị n'ime.
Mgbe ahụ, a gbakwunyere 2.4kg agbakwunye na ọnọdụ a na-achịkwa ihe nlere anya na 60 ℃. Mgbe mgbakwunye na dimethym ot, metylene chloride chloride chloride na alkaline Cellulose 1.97, a na-achịkwa ogo ogo nke proshugose 1.97, a na-achịkwa ogo nke ihe ahụ site na Puller ℃ ruo 80 ℃. Mgbe ịgbakwunye chloromethane na proplene oxide, a na-achịkwa ọnọdụ okpomọkụ ahụ na-achịkwa site na 80 ℃ ruo 90 ℃. Na mgbakwunye, mmeghachi omume dịgidere nkeji iri abụọ na 90 ℃.
A na-enweta ikuku ahụ site na ihe na-eme ihe na ihe na-egbu egbu hydroxypyl methy selli cellopse na-ewepụ ya na ihe. Ọnọdụ okpomọkụ nke crude hydropyylthyl cellulose bụ 62 ℃. Tụọ nha na-ejikọkarị nha nke na-eme ihe na-enweghị ngụkọta dabere na nha nke crude hydropyyl cellulose site na oghere nke na-agbagha, onye ọ bụla nwere oghere mmeghe dị iche.
N'ihi nke a, nkezi nha nke ihe ndị dị mma bụ 6.2mm. A na-ewebata Stroxyl Methyl Celllise na Biaxial ikpere (krc Shareder S1, L / D = 10.2 N'ihi nha ndị yiri ya na-eji nyocha ise nwere nha ime mmeghe dị iche iche, nkezi nkezi bụ 1.4mm. Dinggbakwunye 80 ℃ mmiri ọkụ na decomposed Cruzy Tred Methyppypylthyl cellulose na osobochi nke okpomoku nke jaket. Onu ogugu ibu nke decompod cred Methyppropyl methyl cellose na ngụkọta nke slurry bụ 0.1, a na-enwetakwa slurry. A na-akpali slurry n'oge okpomọkụ nke 80 ℃ ruo minit.
Mgbe ahụ, a na-enye ndị ahụ na-atụgharị ọsọ nke 0,5 rpm na pre-kpọnwụọ na-ekpo ọkụ nzacha rotary (bhs sonhofen ngwaahịa). Ọnọdụ okpomọkụ nke grout bụ 93 ℃. Jiri mgbapụta ka ọ bụrụ slurry, mwepu mgbapụta bụ 0.2Mpa. Ogo mmeghe nke nzacha rotary bụ 80μm, na mpaghara nzacha bụ 0.12m2. Ihe slurry enyere aka na nzacha nrụgide rotary na-enyocha site na nzacha ma tụgharịrị na achicha iyo. A na - eweta achicha nzacha na 0,3Mpa Steam na 95 ℃ mmiri ọkụ na-eme ka ihe dị arọ nke 10.0
A na-enye mmiri ọkụ site na mgbapụta na nrụgide nke 0.2MPA. Mgbe mmiri ọkụ na-enye ya, a na-enye mmiri nke uzuoku. Mgbe ahụ, mgbe a na-asacha ngwaahịa na nzacha ahụ site na scraper ma kpochapụ ya na igwe na-asa ahụ. Nzọụkwụ ndị a ga-esi na-ewepụta ihe a na-asacha ngwaahịa na-aga n'ihu. Dika eji eme oku - ihicha hygrometer, mmiri mmiri nke a na-asacha ngwaahịa a bụ 52.8%. Ngwaahịa a na-asa ahụ si na nzacha ikuku na-efe efe na 80 ℃, ma ℃, ℃ egwepịa na mmeri mmeri iji nweta hydropyyl na cellilose.
Isipoledication
A na-eji ngwa ahịa HPMC dị ka onye na-agbasa, na-agbasa, ihe mgbochi, emulsifier na mmachi ụlọ ọrụ stutry. A na-ejikwa ya n'ọtụtụ ebe, petrochemical, ceramiiki, mpempe akwụkwọ, akwụkwọ, akwụkwọ, nri, ihe nri, ihe ịchọ mma na ụlọ ọrụ ndị ọzọ.
Oge Post: Mar-23-2022