Hydroxypropyl methylcellulose (HPMC) bụ ihe mgbakwunye dị mkpa na imepụta seramiki ebuanu. A na-eji seramiki mmanụ aṅụ mara site na nhazi pụrụ iche nke ọwa ndị yiri ya, nke na-enye ebe dị elu na nkwụsị nrụgide dị ala, na-eme ka ha dị mma maka ngwa dị ka ihe ntụgharị catalytic, nzacha, na ndị na-ekpo ọkụ. HPMC, ihe nrụpụta cellulose ether, na-arụ ọtụtụ ọrụ dị mkpa n'imepụta ceramik ndị a, na-emetụta nhazi, nhazi na arụmọrụ nke ngwaahịa ikpeazụ.
Njirimara nke HPMC
A na-enweta HPMC site na cellulose, polymer eke kachasị ukwuu, site na mgbanwe kemịkalụ na-ewebata hydroxypropyl na otu methyl. Mgbanwe ndị a kwalite solubility nke cellulose ether na mmiri na organic solvents, na ha na-emetụta rheological Njirimara nke HPMC. Njirimara ndị dị mkpa nke HPMC gụnyere:
Thermoplasticity: HPMC nwere ike ịmepụta ihe nkiri na gels n'elu ikpo ọkụ, nke bara uru na njikọ na ịmepụta seramiki.
Njide mmiri: O nwere ikike ijide mmiri dị elu, nke dị oke mkpa maka ịnọgide na-enwe mmiri na pasta seramiiki.
Mgbanwe Rheology: Ihe ngwọta HPMC na-egosipụta omume pseudoplastic, nke pụtara na ha na-adị ntakịrị viscous n'okpuru nrụgide shiee, nke na-enyere aka n'ịkpụzi na extrusion nke ihe seramiiki.
Ikike njide: Ọ na-arụ ọrụ dị ka ihe nkedo mara mma, na-eme ka ike ndụ ndụ nke anụ seramiiki dịkwuo mma.
Ọrụ HPMC na nrụpụta ceramics Honeycomb
1. Usoro mwepụ
Ụzọ bụ isi maka imepụta seramiki agbụ mmanụ aṅụ bụ extrusion, ebe ngwakọta nke seramiiki ntụ ntụ, mmiri, na ihe mgbakwunye dị iche iche na-amanye site na ịnwụ iji mepụta nhazi nke ebu aṅụ. HPMC na-arụ ọrụ dị oke mkpa na usoro a:
Njikwa Rheological: HPMC na-agbanwe njirimara eruba nke tapawa seramiiki, na-eme ka ọ dị mfe ịpụpụ site na nsị mmanụ aṅụ dị mgbagwoju anya. Ọ na-ebelata viscosity nke tapawa n'okpuru shear (nrụgide extrusion), na-eme ka ọ dị mma na-agba ọsọ na-enweghị mgbochi ma ọ bụ deforming ọwa ndị siri ike.
Njide ọdịdị: Ozugbo a kpochapụrụ ya, tapawa seramiiki ga-ejigide ọdịdị ya ruo mgbe akpọnwụwo nke ọma. HPMC na-enye iguzosi ike n'ezi ihe nwa oge (ike akwụkwọ ndụ akwụkwọ ndụ), na-enye ohere ka ihe owuwu ebuanu na-ejigide ọdịdị ya na akụkụ ya na-enweghị slumping ma ọ bụ agha.
Mmanya mmanu: Mmetụta mmanu mmanu nke HPMC na-enyere aka belata esemokwu n'etiti tapawa na anwụ, na-ebelata iyi na akụrụngwa yana melite arụmọrụ nke usoro extrusion.
2. Ike Green na njikwa
Mgbe extrusion gasịrị, seramiiki mmanụ aṅụ nọ na ọnọdụ "acha akwụkwọ ndụ akwụkwọ ndụ" - ọkụ adịghị ọkụ ma na-esighi ike. HPMC na-enye aka nke ukwuu n'iji njikwa seramiiki ndụ ndụ:
Ike Green emelitere: HPMC na-arụ ọrụ dị ka ihe nkedo, na-ejide akụkụ seramiiki ọnụ site na ihe na-emepụta ihe nkiri ya. Nke a dị oké mkpa maka nhazi na usoro nhazi na-esote, na-ebelata ihe ize ndụ nke mmebi n'oge ihicha na njikwa.
Usoro mmiri mmiri: Ike njide mmiri nke HPMC na-eme ka ntu ahụ na-adịgide adịgide ruo ogologo oge, na-ebelata ihe ize ndụ nke mgbawa na ntụpọ n'oge ọkwa mbụ ihicha.
3. Usoro ihicha
Ịkpọ nkụ bụ nzọụkwụ dị oke mkpa n'imepụta ceramics nke ebu mmanụ aṅụ, ebe iwepụ mmiri nwere ike ịkpata mbelata na ntụpọ ndị nwere ike ime dị ka mgbawa ma ọ bụ ịgbagha. HPMC na-enyere aka na ọkwa a site na:
Ịkpọcha Uniform: Njirimara njide mmiri nke HPMC na-enyere aka n'inweta ọnụ ọgụgụ ihicha otu nha n'usoro ụlọ mmanụ aṅụ, na-ebelata mmepe nke gradients nke nwere ike iduga mgbawa.
Mbelata nke a na-achịkwa: Site n'ịchịkwa ntọhapụ nke mmiri, HPMC na-ebelata mbelata dị iche iche, nke na-enyere aka n'ịkwado nhazi nhazi nke ọwa mmiri aṅụ.
4. Ịgba ọkụ na Ịgba Ọkụ
N'ebe a na-agba egbe, a na-ekpo ọkụ seramiiki akwụkwọ ndụ akwụkwọ ndụ na okpomọkụ dị elu iji nweta sintering, ebe seramiiki na-ejikọta ọnụ iji mepụta usoro siri ike, nke siri ike. HPMC, n'agbanyeghị na etinyeghị aka na usoro a, na-emetụta nsonaazụ ya:
Ọkụ: HPMC na-erepịa ma na-ere ọkụ mgbe a na-agbapụ, na-ahapụ n'azụ seramiiki matriks dị ọcha. Nbibi nke a na-achịkwa na-enye aka na mmepe nke otu pore nhazi na-enweghị nnukwu carbon fọdụrụnụ ma ọ bụ ihe mmetọ ndị ọzọ.
Mmepe Ọdịdị Pore: Mwepụ nke HPMC nwere ike inye aka n'ịmepụta porosity a chọrọ n'ime seramiiki, nke nwere ike dị oke egwu maka ngwa chọrọ nhazi ma ọ bụ njirimara nzacha.
Ngwa-Ntụle ndị akọwapụtara
Ihe Ntụgharị Catalytic
N'ime ihe ntụgharị catalytic, ceramik ebu aṅụ nke ejiri ihe ndị na-eme ka ahụ pụta na-eme ka mbelata ihe ọkụkụ na-emerụ ahụ. HPMC na-achọpụta na mkpụrụ osisi seramiiki nwere ike nrụpụta dị elu yana usoro na-agbanwe agbanwe, nke dị mkpa maka ịrụ ọrụ nke ọma nke onye ntụgharị n'okpuru nrụgide ọkụ na igwe dị elu.
Sistemụ nzacha
Maka ngwa nzacha, ịdị n'otu na iguzosi ike n'ezi ihe nke ihe owuwu mmanụ aṅụ bụ ihe kacha mkpa. HPMC na-enyere aka nweta ezigbo geometry na nkwụsi ike n'ọrụ achọrọ iji nzacha irighiri ma ọ bụ gas nke ọma.
Ndị na-agbanwe ọkụ
N'ebe ndị na-ekpo ọkụ na-ekpo ọkụ, a na-eji seramiki ebu aṅụ na-eme ka ọ dịkwuo ọkụ ka ọ na-ebelata nkwụsị nrụgide. The akara na extrusion na ihicha usoro nyere HPMC na-arụpụta a ọma kọwaa na edo chawa Ọdịdị na-ebuli thermal arụmọrụ.
Ihe ịma aka na ihe ọhụrụ
Ọ bụ ezie na HPMC na-enye ọtụtụ uru n'ichepụta ceramik mmanụ aṅụ, e nwere ihe ịma aka na-aga n'ihu na mpaghara maka imepụta ihe ọhụrụ:
Nkwalite nke usoro: Ịchọta ezigbo ntinye nke HPMC maka nhazi seramiiki dị iche iche na ngwa chọrọ nyocha na mmepe na-aga n'ihu.
Mmetụta gburugburu ebe obibi: Ọ bụ ezie na HPMC sitere na cellulose, mgbanwe kemịkalụ na nhazi usoro na-ebute nchegbu gburugburu ebe obibi. Ịmepụta ụzọ mmepụta ma ọ bụ ihe ndị ọzọ na-adigide bụ mpaghara nyocha na-arụsi ọrụ ike.
Ngwongwo arụrụ arụ emelitere: Ọganihu na usoro HPMC bu n'obi imeziwanye nkwụsi ike nke okpomọkụ, njide arụmọrụ, yana ndakọrịta na mgbakwunye ndị ọzọ iji welie arụmọrụ nke ceramik mmanụ aṅụ na-achọ ngwa.
Hydroxypropyl methylcellulose (HPMC) bụ ihe mgbakwunye dị mkpa na mmepụta nke ceramik mmanụ aṅụ, na-emetụta nhazi, nhazi, na arụmọrụ nke ihe ndị a. Site ikwado extrusion na-emewanye green ike na n'ịhụ edo ihicha, HPMC si Njirimara na-harnessed iji nweta elu-edu seramiiki ngwaahịa adabara dị iche iche ulo oru ngwa. Ihe ọhụrụ na nkwalite na-aga n'ihu na usoro HPMC na-aga n'ihu na-agbasawanye ọrụ ya n'ọhịa nke ceramics dị elu na-agbanwe agbanwe.
Oge nzipu: Jun-17-2024