PMID- 31269832
OWN - NLM
STAT- MEDLINE
DCOM- 20191230
LR  - 20191230
IS  - 1464-5246 (Electronic)
IS  - 0265-2048 (Linking)
VI  - 36
IP  - 4
DP  - 2019 Jun
TI  - Influence of synthesis parameters on properties and characteristics of poly 
      (urea-formaldehyde) microcapsules for self-healing applications.
PG  - 410-419
LID - 10.1080/02652048.2019.1638462 [doi]
AB  - Poly(urea-formaldehyde) (PUF) microcapsules filled with dicyclopentadiene (DCPD) 
      were prepared by in situ polymerisation and the effect of synthesis parameters, 
      such as pH of the solution and agitation rate, on microcapsules size and shell 
      thickness was evaluated. Scanning electron microscopy (SEM) and Fourier transform 
      infra-red spectroscopy (FTIR) were performed. Adjusted pH conditions (pH = 3.5) 
      and agitation rate (1350 RPM) were found using a design of experiments (DOE). SEM 
      results indicated that microcapsule size was directly affected by agitation rate, 
      whereas shell thickness was mostly affected by pH. After obtaining adjusted 
      synthesis conditions, microcapsules presenting mean size of 60 microm and mean shell 
      thickness of 4 microm were embedded in an epoxy matrix for evaluating the 
      self-healing effect. FTIR and SEM analyses in damaged samples suggested that a 
      healing agent was delivered to the crack location.
FAU - de Carvalho, Ana Claudia Medeiros
AU  - de Carvalho ACM
AD  - a Department of Materials Engineering , Federal University of Rio Grande do Norte 
      , Natal , Brazil.
FAU - Ferreira, Evans Paiva da Costa
AU  - Ferreira EPDC
AD  - b Department of Mechanical Engineering , Federal University of Rio Grande do 
      Norte , Natal , Brazil.
FAU - Bomio, Mauricio
AU  - Bomio M
AUID- ORCID: 0000-0001-9016-4217
AD  - a Department of Materials Engineering , Federal University of Rio Grande do Norte 
      , Natal , Brazil.
FAU - Melo, Jose Daniel Diniz
AU  - Melo JDD
AUID- ORCID: 0000-0002-3696-5133
AD  - a Department of Materials Engineering , Federal University of Rio Grande do Norte 
      , Natal , Brazil.
FAU - Cysne Barbosa, Ana Paula
AU  - Cysne Barbosa AP
AD  - a Department of Materials Engineering , Federal University of Rio Grande do Norte 
      , Natal , Brazil.
FAU - Costa, Maria Carolina Burgos
AU  - Costa MCB
AD  - a Department of Materials Engineering , Federal University of Rio Grande do Norte 
      , Natal , Brazil.
LA  - eng
PT  - Journal Article
DEP - 20190705
PL  - England
TA  - J Microencapsul
JT  - Journal of microencapsulation
JID - 8500513
RN  - 0 (Capsules)
RN  - 0 (Indenes)
RN  - 0 (Polymers)
RN  - 1HG84L3525 (Formaldehyde)
RN  - 37955-36-5 (polyurea)
RN  - 88Z4HUV8LI (dicyclopentadiene)
SB  - IM
MH  - Capsules/*chemical synthesis/chemistry
MH  - Chemistry Techniques, Synthetic
MH  - Drug Compounding
MH  - Formaldehyde/*chemical synthesis/chemistry
MH  - Hydrogen-Ion Concentration
MH  - Indenes/administration & dosage
MH  - Particle Size
MH  - Polymerization
MH  - Polymers/*chemical synthesis/chemistry
OTO - NOTNLM
OT  - polymerisation
OT  - Microcapsules
OT  - factorial design
OT  - poly(urea-formaldehyde)
OT  - self-healing
EDAT- 2019/07/05 06:00
MHDA- 2019/12/31 06:00
CRDT- 2019/07/05 06:00
PHST- 2019/07/05 06:00 [pubmed]
PHST- 2019/12/31 06:00 [medline]
PHST- 2019/07/05 06:00 [entrez]
AID - 10.1080/02652048.2019.1638462 [doi]
PST - ppublish
SO  - J Microencapsul. 2019 Jun;36(4):410-419. doi: 10.1080/02652048.2019.1638462. Epub 
      2019 Jul 5.