Khoa hoc va Cong nghe 132 (2019) 081-086
Nghien ciiii kha nang sfr dung xff da thuoc de che tao vat lifu compozit nln nhya epoxy
Study on the Possibility of using Leather Fibers to Make Epoxy Composite
Biii Vdn Hu&n '*, Boan Anh VU ', Nguyin Pham Buy Linh ', Ngo Thi Kim Thoa^
' Trudng Dgi hoc Bdch khoa Ha Noi - Sd 1, Dgi CS Viet. Hai Bd Trung. Hd Ngi
^ Trudng Dgi hpc Cong nghiep Det may Hd Npi. Xd Le Chi, huyen Gia Ldm, thdnh phd Hd Ndi Din Toa sogn: 23-01-2018; chap nhdn ddng: 18-01-2019
Tom tat
Ng^nh san xuit giay va sin phim da noac ta tao ra loang l&n da thuoc phi lieu va vi§c xir ly chung g$p nhieu kho khan. Trong nghien ciiv nay, da thuoc phi lieu doge nghien xe thanh dang xa da co daang kinh 0.08 -^ 0,3 mm, chieu dai 5 ^ 15 mm. Xa da doge tron vai nhua nin epoxy (co cac phu gia) va dagc ep ihanh vat lieu compozit (co ty le xa da/nhga nin khac nhau) vai cac chi do cong nghe ep khac nhau. Cac miu vat lieu compozit dagc thir nghiem do ben dui, do bin uon, do ben va dap. Hinh thai hoc cua v$t lieu compozit doge quan sat bang kinh hiin vi dien tu- quet hieu ong traang (FE-SEti/l). Vat lieu compozit co cac tlnh chit tit v&i ty le pha tron xa da la 40%. Chi do ep vat lieu compozit phii hgp: ap suit ep 5 atm. nhiet dg ep 60 °C va thai gian ep 2 h.
Tif khoa: Compozit xo da, xo da thugc, xa da epoxy Abstract
yietnames footwear and leather goods industries generate large amounts of chrome tanned leather wastes and their treatment is difficult. In this study, the dry leather waste was grounded In a hammer miller, to get short leather fibers with a diameter of 0.08 ^ 0.3 mm, length 5-15 mm. Fibers are mixed with epoxy resin (with additives) and pressed into composite materials (with different ration of epoxy resin/leather fibers) by different press technology parameters. Composite samples were tested for breaking strength, bending strength and impact strength. The morphology of the composite material was observed by field effect electromagnetic microscope (FE-SEM). Composite materials have good properties with a leather fibers ratio of 40%. The suitable press technology parameters for the composite are pressure of 5 atm, pressing temperature of 60 °C and pressing time of 2h.
Keywords: Composite epoxy/leather, composite leather, leather fiber
l.Datvande phd lieu da thudc, da cd nhieu nghign eiiu su dung _, , ; - „ , , cac nen polyme khde nhau nhu nhua nhiet ran (epoxy Theo ket qua Du an Khao sat, danh gia th^c ^ ^ ^ =^ l^^^^l ^^^ ^ ^ ^ ^.g^ ^.^ ^ , j , rang tieu hao cac oai nguyen vatJieu va chat thai ran ^^ ^^^ i j ^ j ^ ^ ^ ^4 ^^ polyraethyl metha
^ongnganh da giay Viet Nam' do Vien Ngh.en crai , , ^ , , t . . \ ca^c loai cao su tdng hop (butadien, styren Da giay diuc hien, nara 20I4,_a nuoc ta, hang nam, J^^J ^^^ ^^ ^,^^., _j ^ - ^ ^^ ^-^ ,ig„
cac doanh nghiep san xuat giay ddp va tui cap thai ^^^ ^^^^ ^^ j ^ ^ . ^ ^^^ ^^ g^ ^.^
k r S vl I "^^'"J^.^'^'^t / ' ! l ' - ' T - ' vl vdt iidu corapozit epoxy vdi pha phan tdn Id xo da.
QO khoang 60% la da thudc phe heu. Vdl tdc do phdt F H J t- F ^ tnen nhu hien nay, ddn nara 2025, lugng chdt thdi rdn Nhua epoxy la radt loai nhua nhiet rdn tdn tai d cua nganh Da gidy nude ta dat khoang 300 nghin tdn. trang thai ldng nhdt, khi cd raat cua chdt ddng rdn se Hien nay, tai Viet Nara chdt thai rdn cua nganh Da chuydn sang irang^ ran. Nhua epoxy dugc su dung giay dugc xir ly bdng each chdn ldp hoac ddt bd nen nhidu trong sdn xuat vdt lieu compozit. Trong nghien gay 6 nhiera mdi trudng, lang phi ngudn xo collagen cuu ndy, tidn hanh khao sat kha nang su dungloai t\r nhien ttong da, nhua nay kit hgp vdi xo da thudc phe lieu dd che tao
T " tu' -• - , , . , , . , , . ; , » ; vdt heu compozit.
iren the giai, giai phap dugc su dung nhieu doi
vm phe thai ran dang xo sgi la sii dung ldm thanh 2. Thyc nghiem
piiln phdn tan eho vat lieu compozit [1-6]. Ddi vdi 2.1. Hoa chat vd xff da su dung
— Nhua epoxy (ER) Epikote 828, cd xudt xir tir
'Bia chi hen he' Tel.: (+84) 989890521 W . ham lugng nhdra epoxy 22,63%, dd nhdt 12-14
Email' huan.buivan@hust.edu.vn P^-s (25"),
Tap chf Khoa Chat ddng ran dietyltriamin (DETA), cua Trung Qudc. Khdi lugng chdt dong rdn KL cho vao nhua epoxy Id ] 1,5% vd dugc xac dinh theo cdng thuc:
KL = (M*a''k)/(43''n).
trong dd: M Khdi lugng phan tu DETA;
k: He sd phu thudc thdi tidt;
43: Khdi lugng phan tir nhdra epoxy;
n: Sd nguyen tu hydro hoat dgng Uong amin;
a: % nhdm epoxy cd trong nhua epoxy.
Dung radi axeton cua Trung Qudc.
Chdt hoat ddng be mat Levotan: Day la hgp chdt huu eg cd tdc dung lam tang khd nang tham udt cua nhua ngn epoxy vao xa da.
X o da rain cd dudng kinh 0,08 ^ 0,3 ram, chigu dai 5 - ^ 1 5 mm thu dugc sau qud trirdi nghien xe khd (bang may nghign biia) tu phg lieu da bd cat klidng nhudm mdu.
2.2. Cdc npi dung nghien cuu
Khdo sat kha nang ddng ran cua epoxy vdi chat khau raach DETA khi cd raat xa da thdng qua xdc dinh ham lugng phdn gel,
Khao sat anh hudng cua dp luc, nhiet do vd thdi gian nen ep dinh hinh tdi dp bdn co hpc cua vdt lieu corapozit epoxy/xa da- Thu: nghiera ep radu vdi cdc digu kien ep khac nhau: nhiet do 50, 60 va 70 °C, thdi gian I, 2 va 3 h, ap suat 3, 5, 10 atm. Ddnh gia cac tinh chat co hoc ciia cac mdu vat lieu.
Khao sat anh hudng cua ty le pha tron epoxy/xa da, chat hoat ddng be mat (chat HDBM) tdi dd bgn ca hgc cua vat lieu compozit epoxy/xa da, su phan tan xo da trong vdt lieu corapozit
2.3. Phuffng phdp vd trang thiet hi nghien cuu Chudn bi raau thi nghigm cho cdc ndi dung nghien cdu theo quy trinh nhu tren hinh I,
Dg chudn bj mdu, su dung cac dung cu va thiet bi cua Trung tam Nghien ciiu Vdt heu Polyrae, trudng dai hoc Bach khoa Hd Ngi, cu thg Bd soxhlet;
Can dien hi DJ-300TW, VIBRA, SHINKO; Khudn ep radu kich thudc 20x20 cm. Id lan; May khudy ca hgc; Mdy ep mau Gotech cd lua ep ddn 30 tan.
Tieu chudn vd thiet hi thu mdu: Do bgn keo dirt cua raau thu dugc xac dinh theo ISO 527-1993, dd bdn udn theo ISO 178: 1993 tren raay INSTRON 5582, do bdn va dap theo ISO 179:1993 trgn rady TINIUS OLSEN, Hinh thai hgc cua vdt lieu dugc danh gid thdng qua su phdn bd cua cac pha trong vdt lieu theo dnh chup be mat cua vat lieu bang may chup hidn vi dien tu quet (SEIVl) JEOUSM-7600F. Danh
gid do hut nude, do truang nd cua vat lieu bang phuong phdp cdn, do. Xac dinh ham lugng phan gel su dung bd soxhlet.
Nhua Epoxy
Chat dong ran
Khuay 5 ph, t" thirdng
Chat hoat dpng bS
mat
Tron 5 ph, t° thudng mg
Chong dinh khuon
Ep mau: Nhie! do (50, 60, 70 °C), thai gian (1,2, 3h), apluc(3,5,
10 atm)
cat mlu (24 h sau khi ldy mlu khoi khuon ep)
Thu nghiem mau Hinh 1. Quy trinh chuan bi mdu thi nghiem 3. Ket qua va ban luain
3.1. Ket qua khdo sdt dnh huffng cua hdm luffng xff da t&i ham luffng phan gel
Hinh 2. Hdra lugng phdn gel theo ty !e pha trdn epoxy/xa da
Ket qud tren hmh 2 cho thdy ham lugng phdn gel ty le nghich vdi hara iugng xa. Khi ham luang xa ttong raau tang tu 20% len toi 35%, hdm lugng phdn gel giam 21,74% Nhu vay, su c6 mat x o lara giam hieu sudt phdn irag ddng rin Vd ly thuydt, dd rapt phan ling hda hgc xay ra thi didu kien cdn thidt ca bdn nhdt la phai cd su tiep xuc giua cac thanh phdn tham gia phan iing. Do do, mudn tang hieu sudt phan dng dong ran thi can tang cudng digu kien ddp xuc bdng each bd sung dp lire va thai gian ep nhdm khde phuc s ^ c a n trd ciia cdc xa da ddi vdi su tigp xiic cua cac phan tir nhua epoxy va cac phdn td chdt ddng rdn
iSMi
hi Khoa hgc va C6ng nghe 132 (2019) 081-086
3.2. Kit qua khdo sdt dnh hu&ng cua dp luc, nhiet
^ va th&i gian nen ep Mnh hinh t&i do ben cff hgc cua vat li^u compozit epoxy/xff da
3.2.1. Ketqud khdo sdt dnh huong cua dp luc ep KSt qud thu nghiem trong bang 1 cho thdy khi ap lire ep mdu thay ddi tang tu 3 atm ldn 5 atra, ca 3 chi tieu dp hgn da do dgu tang ldn dang ke (khoang 9- 12%) Tuy nhien, khi tang hep ap luc ep dinh hinh ciia mdu tu 5 atm len 10 atm, ca 3 ehi tieu do bdn thu duoc lai gidm xudng rat nhanh. Nhu vdy vdi vat heu epoxy/xo da, nen ep dinh hinh d ap luc qua cao hay qua thdp deu lam cho su tham udt, bao phu thuc te ciia nhua len be mat xa giara. Vdi dp luc nhd, nhua khdng phdn bd dugc deu vao khoang trdng giua cac xo de hinh thanh su tham udt; vdi ap luc qua ldn, nhira se bi ddy khdi khudn ldm giara lugng nhua thuc t§ lien ket vgi xa da. Do vay, muc nen ep phii hop dd dinh hinh vdt lieu compozit epoxy/xa da trong nghien Cliu nay la 5 atm va muc nen ep nay se dugc su dung trong qua trinh tao radu d cac nghien ciiu tiep theo.
Bang 1. Kgt qud xdc dinh tmh chdt co hgc cua vdt lieu compozit epoxy/xa da vdi cac ap luc khac nhau
Tinh chat Do ben keo, MPa Do ben uon, MPa Do ben va dap, KJ/m-'
Ap luc ep, atm 3
17,3 34,7 17,6
5 18,9 38,8 19,1
10 15,8 30,9 15,5 ill. Ket qud khdo sdt dnh hu&ng ciia thai gian ep Bang 2. Kgt qud xdc dinh tinh chdt co hgc cua vdt heu compozit epoxy/xa da vdi thdi gian ep khac nhau
Tinh chat Do hka keo, MPa Do ben uon, MPa Do ben va dap, KJ/m^
Thai gian ep, h 1
17,1 2 6 , 6 15,1
2 18,9 38,8 19,1
3 19,4 39,1 19,7 Tir cac sd lieu trong bang 2 nhan thay ca 3 chi tieu do ben do dugc cua cdc mau epoxy/xa da dgu tang len khi keo ddi thdi gian dinh hinh. Digu nay la hop ly vi thdi gian cang ddi thi cdc phdn tu chat ddng ran cdng cd khd nang khudch tan va phdn bd tdt trdn toan fad mdu do vay ty le hinh thanh raang khdng gian se tang len. Tuy nhien, rairc do thay ddi cac do bgn Widng hoan toan tuygn tinh vdi mdc thay ddi vd thdi gian nen ep. Vdi thdi gian nen ep chua dai thi khi ldng thdi gian, do bgn ciia mdu tang lgn rat nhieu, Cu the khi tang thdi gian nen ep tit I h len 2 h, do ben uon fang tdi 45%, dg bdn va ddp tdng thdm 26%. Khi Sng thai gian ddng rdn tir 2 h lgn 3 h, nhin chung cd 3 chi tieu dd bdn vdn lang len nhung muc do tang cham han rdt nhidu (khoang 3%). Ddy cd thd coi la mirc tang khdng that su hidu qua Do vdy dd dam bao thu dugc mdu cd dg bdn ca hgc tdt nhung kliong keo
ddi qua trinh gia cong vdt lieu, nen nen ep dinh hinh vat lieu compozit epoxy/xo da vdi thai gian 2 h.
3.2.3. Ket qud khdo .'idt dnh hudng ctia nhiet do ep Sd lieu trong bang 3 cho thdy nhiet do gia cong cd anh hudng dang ke ddn tinh chdt cua vdt lieu compozit epoxy/xo da. O nhigt do dC'C, cac dnh chdt CO hgc cua vdt lieu dat ldn nhdt: Do bdn udn, do bdn keo, dd ben va dap cao hon so vdi gia cdng d nhiet dd 50^C ldn lugt khoang 19,01%, 8%, 21,11% va d nhidt do 70''C khoang 24,95%, 6,29%, 12% 6 nhiet dd gia cdng 50°C vd 70°C cac tinh chdt co hoc ciia vdt lieu kem hon, Kdt qua nay cd the la do chdt ddng ran amin DETA cd phdn ung xay ra nhanh d nhiet do tuong ddi thdp, de bay hgi, nen khi gia cdng d nhiet dd 70^C cd the chat ddng ran bi bay hai mdt phdn Iam sai Idch ty le ddng ran. Hon nira d 70''C phdn img ddng ran xay ra nhanh, tda nhigu tdiiet lara anh hudng den tinh chat vat heu. Ben canh dd, kgt qua khdo sdt vg dnh hudng cua xo da den khd nang ddng ran cua nhua epoxy (hara lugng phdn gel hda) d rauc 3.1 cho thdy su cd mat ciia xa da lara giam khd nang ddng ran cua nhua epoxy do x a da can u d kha nang tigp xiic cua chat ddng ran vdi nhua nen. O nhiet dd SO^C su can trd nay vdn cdn khd raanh nen cdc tinh chat co hgc cua vat lieu khdng cao. O nhiet do 60*'C, do nhdt cua nhua epoxy dugc giara di ddn den tang kha nang bao phii va khd ndng tiep xuc giua DETA va epoxy nen lara tang tinh chdt co hgc cua vdt Heu. Do vdy nen ep dinh hinh vdt lieu corapozit epoxy/xo da d nhiet dd 60°C
Bang 3. Ket qua xac dinh tinh chat co hoc cua vdt lieu compozit epoxy/xa da vdi nhidt dd ep khde nhau
Tinh chat Do ben keo, MPa Do ben uon, MPa Do b^n va dap, O / m ^
Nhiet do ep 50 24,1 35,5 17,9
60 26,2 43,8 22,9
• c 70 24,6 32,9 19.9
55/45 E0;50 Tyl^ phalr^nnhua/MTda
Hinh 3. Anh hudng cua ty Id pha trdn epoxy/xo da, chdt HDBM ddn do bdn keo cua vdt lieu corapozit epoxy/xo da
Tap chi Khoa h 3.3. Ket qud nghien cuu dnh hu&ng cua ty le pha tron epoxy/xff da, ch&t hogt dpng be mat t&i dg bin Cff hpc cda vat li$u compozit epoxy/xff da 3.3.1. Anh hu&ng den do ben keo
Sd lieu h-en hinh 3 cho thay, d ty Id pha trgn epoxy/xa da la 60/40, do ben keo dat gia tri cao nhat, Dieu ndy cd thd giai thfch la do ty le pha trdn nay la vira du dd nhua ddm nhan vai trd bao bgc va ket dinh giira cdc x o phdn tdn. Luc keo tdc ddng ldn mau se dugc nhua ndn truyen den cac xo ket dinh vdi ndn epoxy (qua cac cdu ndi lien ket la nhua nen) nen do ben keo dirt dat muc cao nhdt. O cac raau cd hdra lugng x a da nho, nhua cd xu hudng di chuydn ve be raat x a da, nhd vdo khd nang thara hiit tdt cua x a da se gay ra hien tugng tach ldp, lam gidra dd bdn cua vdt lidu, Vdi ty le pha trdn cd ham lugng xo da Idn, xo chidra phdn Idn the tich raau (do ty trgng ciia xo da Id rat nhd), nen cdng tang ham lugng xo, khd nang tham udt x a cua nhua cang gidm, xo khdng phdn bd tot, giira cac xo cd thg thigu can ndi lidn kdt, be raat xo da khdng dugc thara udt ddu tao ngn khuyet tat lam giara dp ben cua vat lieu, Ngodi ra, hara lugng x o da Idn cung gay can trd cho qud ttinh ddng ran ciia nhua, do dd lam gidra do ben keo ciia nhua epoxy,
Vdi tat ca cac ty Id pha trdn nhua/xo khde nhau (tir 80/20 ddn 50/50), khi cho thera chdt boat ddng bd raat, do bgn kdo cua radu dgu tang khodng 25%. Dieu nay cho thay khd nang ket dinh eiia nhua va xo tang Ien khi cd chdt boat ddng bg raat. Vdi cac radu khdng cd chat boat dgng be raat, do sue cang be mat giiia cac pha ldn nen khd nang phdn bd pha kem, khd nang bao phu cua nhua tren be mat xa khdng boan toan ddng nhdt, nen tdn tai khuyet tat lara gidra tinh chdt cua vat lieu.
3.3.2 Anh hu&ng den do ben uon
Hinh 4. Anh hudng cua ty le pha ttdn epoxy/xa t chdt HDBM ddn dd ben udn cua vat hdu corapozit epoxy/xo da
Tu kdt qud thi nghiera tren hinh 4 thay rang vdi hdu hdt cac ty le pha trdn, do bdn udn cua mdu khdng cd sir bign ddi nhidu, tru raau cd ty le pha trgn la 60/40. Do bin udn d ty Id pha trdn 60/40 cao hon han
so vdi cdc radu cdn lai. Trong %'dt lieu corapozit, thanh phdn x o sai gia cudng la ydu td chiu uon ctunh vi vdy su lign ket cac x a nay la ydu to quyet d p h toi do bdn udn. Dd bdn udn chi dat dugc ket qud tdt nhat khi cac x o dugc lien kdt tdt vdi nhau. Ham lugn^ x a qud thdp hay khi khdng du hdm lugng nhua de ket dinh cac xa ddu lam giara dd bdn udn cua vat lieu corapozit.
Tai tdt ca cac ty Id pha Udn nhua/xa (tir 80/20 ddn 50/50), khi cho thdm chdt hoat ddng bd m | t , do ben udn cua raau ddu tang tren 20%i. Ket qua ndy hoan toan tuang thich vdi kdt qud ve do ben keo thu dugc trong muc 3.3.1.
3.3.3. Anh hu&ng den do ben va ddp
Sd lieu thd hien trdn hinh 5 cho thdy mdu cd ty Id pha trgn 60/40 eho gia tti do bdn udn cao nhdt la 19,1 KJ/m-, Do tac ddng va dap la tac dgng tdc thdi, tap trung va khdng cd tinh chu ki nen cd dnh hudng rat raanh lara phd vo radi lidn ket be mat giiia xo va nhua. Su bien ddi tinh chat cua dg bdn va dap thu dugc trong thuc nghiera ndy hodn toan phu hgp vdi cac ket qud ve do bdn keo vd do ben udn da duac phan tich d cac rauc 3.3.1 va 3.3.2.
Hinh 5. Anh hudng ciia ty Id pha trgn epoxy/xo da, ehdt HDBM den do ben va dap cua vdt lieu compozit epoxy/xa da
Vdi tat ca cdc ty Id pha ttrdn nhua/xa khac nhau (td 80/20 ddn 50/50), xo da dugc xu ly bdng chdt boat dong ben raat Iam tang dp bdn udn cua radu khoang 16 - 18%. Ket qua nay hodn todn tuong thich vdi kdt qua vd do ben keo va dd bdn udn da ttinh bay d cdc muc 3.3.1 va 3.3 2.
Nhu vay, vat lieu polyme compozit cd ty le nhga epoxy/xa da 60/40 cho cac tinh chdt ca hgc tdt nhdt, Vai cac ty Id pha tt-gn da tidn hdnh khao sdt su CO radt cua chdt hoat ddng be raat ldm cho tinh ch4t CO hoc cua vdt hdu tang len Su cd mat cua chdt hoat dpng be mat lara tang kha nang thdm udt cua x o nen lam tang kha nang tuang hgp giua hai pha xo - nhua.
3 3.4 Anh hu&ng ciia ty le pha ngn i&x ^Q ^^^ „ „ ^ ^ va kha nang trucmg na cua vgt heu
hi Khoa hgc v^ Cong ngh6 132 (2019) 081-086 f Bang 4 Ket qua xac dmh do hut nuoc trung binh cua
cac mdu vdt lieu corapozit epoxy/xa da (60/40)
MIJC tang khoi luona mau, %
Thai gian ngam nuac, h 2
0,01 4 0,01
26 0,03
50 0,06 Bang 5. Ket qua xac dinh do truong nd ciia cac radu vat ligu compozit epoxy/xa da (60/40)
Kich thuoc trung bmh cua 3 mlu, mm Mlu ban dan Sau khi ngam nuoc 50 h Chenh lech
Kich thurac ralu, mm Rong
55,50 55,50 0,00
Dai 56,23 56,23 0,00
Day 6,40 6,60 0,20 Cac sd heu thi nghiem trong cac bang 4 vd 5 cho thay cac mdu vdt lieu corapozit epoxy/xo da hau nhu khdng hut nude. Sau 50 gid ngara trong nude, eac mau vdt Heu cd dg hut nude rat nhd, dat 0,06%. khdi lirong mdu ban ddu. Sau 50 gid ngdra nude, cac mdu vat lieu corapozit nghien cdu khdng thay ddi kich thudc theo chidu dgc vd chieu ngang, Ridng kich thudc theo do day tang tir 1,56 den 4,68%.
Hinh 6. Hinh dnh FE-SEM ciia cac radu vdt lieu epoxy/xa da cd do phdng dai 500 ldn: a, b, c, d, e, f, g tuong duong ty Id pha ndn: 80/20, 75/25, 70/30, 65/35, 60/40, 55/45, 50/50
3.3.5. Ket qud khdo sdt dnh hu&ng ciia ty le pha Iron epoxy/xa da den hinh thdi hoc cua vgt lieu compozit
Dd cd thd danh gid radt each true quan ve can ttdc hmh thai va su phan bd pha Q-ong vat lieu, da chup be mat cac mau vat heu cd ty Ie x o da hi 20 den 80%
bdng kinh hidn vi dien tu quet vdi do phdng dai 500
Tap chi Khoa 1 ldn. Ket qua dugc thd hien tren hinh 6.
4. K i t luSn
Co the su dung xo da thudc phd lieu ket hgp vdi nhua nen epoxy dg che tao vat lieu corapozit cd cac tinh chdt co hgc tdt va kha nang hut nude, truang nd thap. X a da cdn trd va lam chara toe do va hieu suat cua phdn ung ddng ran khau raach cua nhua epoxy.
Do vay, voi loai vdt lieu epox>/xa da, qud trinh ddng ran can cd su hd ttrg ciia dp luc, nhiet do va thdi gian.
Vdi cdc didu kien da khdo sat, dp luc, nhiet do va thdi gian nen ep dinh hmh phu hgp dd chd tao vat hdu epoxy/xa da la 5 atra, 60 "C va 2 h. Dieu kidn nay vua dam bao thu dugc vat lieu cd dac tinh ca hgc tdt vira dara bdo thdi gian gia cdng phu hgp. Chat boat dgng be raat Lavotan phii hgp de giara sue cang be raat phdn chia pha giira epoxy va xg da, iam tang kha nang ttjong hgp cua chung, tang cdc chi tidu do ben CO hgc cua vdt lieu corapozit epoxy/xo da. Trong khoang ty le pha trgn da khdo sat, radu cd ty Id epoxy/xa da 60/40 cd dp bdn ca hgc va hinh thdi hgc tot nhat. Cac ket qua thu dugc trong nghien ciru nay Id CO sd quan trpng de tigp tue nghien cim vg vat lieu corapozit epoxy/xa da.
T a i lieu thara khao
[1]. Rethmam Sendiil, Sathyaraj Wesien Vedakuman, Leather fibers as reinforcement for epoxy composites- A novel perspective. Fibers and Polymers, Vol.16, No.l (2015) 181-187.
[2]. B. Ramaraj, Mechanical and thermal properties of ABS and leather waste composiies, Jouraal of Applied polymer science. Vol. 101 (2006) 3062- 3066.
[3]. J.D. Ambro' sio, A.A, Lucas. H. Otaguro, L.C, Costa, Preparation and characterization of poly (vinyl butyral)-leather fiber composites. Polymer Composites (2011),
[4], J Tomaz, S Madera, CT. Albeno and A.M. Lucedo, Extmsion and mechanical characterization of PVC- leather fiber composites, J. Polymer Composites, Vol, 19, N o 4 (1998) 431-439.
[5]. A. G. Andreopoulos and P.A. Tarantili, Waste leather particles as a filler for poly (vinyl chloried) plastisols, Jouraal of MacromoSecular Science, Part A' Pure and Applied cheraistty, A37 (i 1) (2000) 1353-1362.
[6], M, Ashokkumar, P. Thanikaivelao, R. Murali, Preparation and characterization of composite sheets from collagenous and chromium-collagen complex wastes using polyvinylpyrrolidone: Two problems, one solution, Waste Biomass Valor, (2010) 347-355.